Medicinal and Aromatic Plants in Agricultural Research When Considering Criteria of Multifunctionality and Sustainability

A special issue of Agriculture (ISSN 2077-0472). This special issue belongs to the section "Crop Production".

Deadline for manuscript submissions: closed (10 December 2021) | Viewed by 68660

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Guest Editor
Department of Agricultural, Food and Forest Sciences, Università degli Studi di Palermo, 90128 Palermo, Italy
Interests: agronomy and crop sciences; constructed wetlands; wastewater reuse in agriculture; phytoremediation of polluted water and soil; industrial crops for energy use; aromatic and medicinal plants; turfgrass for sport fields; green roof ecosystem functioning
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Guest Editor
Department of Biological, Chemical and Pharmaceutical Sciences and Technologies, Università degli Studi di Palermo, 90128 Palermo, Italy
Interests: natural compounds; organic chemistry; secondary metabolites from Mediterranean plants; volatile component

E-Mail Website
Guest Editor
Department of Agricultural, Food and Forest Sciences, Università degli Studi di Palermo, 90128 Palermo, Italy
Interests: agronomy and crop sciences; aromatic and medicinal plants; constructed wetlands; wastewater reuse in agriculture; turfgrass; green roofs; industrial crops

E-Mail Website
Guest Editor
Department of Agricultural, Food and Forest Sciences, Università degli Studi di Palermo, 90128 Palermo, Italy
Interests: agronomy and crop sciences; aromatic and medicinal plants; constructed wetlands; wastewater reuse in agriculture; turfgrass; green roofs; industrial crops

Special Issue Information

Dear Colleagues,

Over the last twenty years, agriculture has witnessed significant changes in terms of energy requirements, advanced technologies, and practices. This is in response to the impacts of crop production on the climate and environment and increasing awareness of the importance of agricultural sustainability through organic farming. Agriculture encompasses complex production systems, and certain aspects of multifunctionality and sustainability have become fundamental for these systems. Agricultural activity can provide various functions in agro-ecosystems, such as producing food, managing natural resources, and conserving landscape and plant biodiversity, contributing to the cultural, historical and economic viability of rural areas. Agriculture must now adopt scientific innovations in order to produce food which takes into consideration not only human wellbeing and the environment but also the requirements of farmers. Aromatic and medicinal plants (MAPs), as open field crops, can play an important role in multifunctional and sustainable agriculture, due to low energy requirements for cultivation and their many uses, from the production of nutraceuticals, phytonutrients, and phytotherapy to land valorization. Various MAPs are used in the food sector to flavor foods or prolong shelf-life, while others are used in modern and traditional medicine in the production of phytocomplexes for human health and well-being. The cultivation of MAPs, when based on an integrated and sustainable approach, can contribute to the conservation and increase of biodiversity in agro-ecosystems, as well as to the recovery of degraded and marginal lands. This Special Issue of Agriculture on “Medicinal and Aromatic Plants in Agricultural Research when Considering Multifunctionality and Sustainability Criteria” aims to illustrate the role of MAPs in agriculture under low-impact farming practices and the benefits they can generate in terms of functional products. This Special Issue accepts contributions that cover all research aspects related to MAPs, and a number of scientific macro-areas can also be included, such as agronomy, chemistry and pharmacy, ethnobotany and ethnopharmacology, food and nutrition, and ecology.

Original research and review papers are welcome. Papers chosen for publication will be selected by a rigorous peer-review procedure with the aim of rapid dissemination of the research results.

Key topics in this Special Issue include but are not limited to the following:

  • Sustainable agricultural practices of MAPs;
  • Breeding and germplasm preservation of MAPs;
  • Biodiversity of MAPs;
  • Conservation of cultivated and wild MAPs;
  • Ethnobotany and ethnopharmacology;
  • Phytotherapy, phytochemistry, and phytopharmacology;
  • Essential oils and secondary metabolites;
  • Functional foods and MAPs;
  • MAPs and degraded and marginal land recovery;
  • Global marketing of MAPs;
  • Legislation of MAPs.

Dr. Mario Licata
Dr. Antonella Maria Maggio
Prof. Salvatore La Bella
Prof. Teresa Tuttolomondo
Guest Editors

 

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Keywords

  • Agricultural techniques
  • Biodiversity
  • Conservation
  • Essential oils
  • Ethnobotany and ethopharmacology
  • Functional foods
  • Legislation and market
  • Natural products
  • Nutraceuticals
  • Phytochemicals
  • Phytotherapy
 

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Published Papers (14 papers)

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Editorial

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4 pages, 180 KiB  
Editorial
Medicinal and Aromatic Plants in Agricultural Research, When Considering Criteria of Multifunctionality and Sustainability
by Mario Licata, Antonella Maria Maggio, Salvatore La Bella and Teresa Tuttolomondo
Agriculture 2022, 12(4), 529; https://doi.org/10.3390/agriculture12040529 - 8 Apr 2022
Cited by 6 | Viewed by 2891
Abstract
Over the last twenty years, agriculture has witnessed significant changes regarding energy requirements, advanced technologies and practices [...] Full article

Research

Jump to: Editorial, Review

11 pages, 2037 KiB  
Article
Iron Chelate Improves Rooting in Indole-3-Butyric Acid-Treated Rosemary (Rosmarinus officinalis) Stem Cuttings
by Zeinab Izadi, Abdolhossein Rezaei Nejad and Javier Abadía
Agriculture 2022, 12(2), 210; https://doi.org/10.3390/agriculture12020210 - 1 Feb 2022
Cited by 5 | Viewed by 2456
Abstract
Adventitious root formation in stem cuttings is affected by exogenous and endogenous factors. The study assessed the effect of Fe(III)-EDDHA (ethylenediamine-N,N-bis 2-hydroxyphenyl acetic acid) on the rooting of 4 indol-3-butyric acid (IBA)-treated hardwood cuttings of the aromatic and medicinal [...] Read more.
Adventitious root formation in stem cuttings is affected by exogenous and endogenous factors. The study assessed the effect of Fe(III)-EDDHA (ethylenediamine-N,N-bis 2-hydroxyphenyl acetic acid) on the rooting of 4 indol-3-butyric acid (IBA)-treated hardwood cuttings of the aromatic and medicinal species Rosmarinus officinalis. Cuttings treated with 0, 1000, 2000 or 3000 mg L1 IBA were placed in pots filled with sand:perlite mixture and irrigated daily with nutrient solution pH 5.8, containing 0, 5, 10 or 20 µM Fe(III)-EDDHA. Ten days later, the number of new emerging roots were recorded. After 20 days, leaf photosynthetic pigments and morphological traits, including root number, fresh (FW) and dry weight (DW), shoot FW and DW, mean length of the longest roots, number of new shoots and new growth in old shoots, were measured. Finally, plants were transplanted to pots filled with a sand:soil mixture and survival was measured after 10 days. Results indicate that Fe application promotes root emergence and improves root and shoot biomass, leaf photosynthetic pigment concentrations and survival percentage. This indicates that using low concentrations of Fe(III)-EDDHA (5–20 µM) in the growth medium could be a good management strategy to facilitate the production of vigorous R. officinalis plants from hardwood cuttings. Full article
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16 pages, 2259 KiB  
Article
The Use of Compost Increases Bioactive Compounds and Fruit Yield in Calafate Grown in the Central South of Chile
by Fernando Pinto-Morales, Jorge Retamal-Salgado, María Dolores Lopéz, Nelson Zapata, Rosa Vergara-Retamales and Andrés Pinto-Poblete
Agriculture 2022, 12(1), 98; https://doi.org/10.3390/agriculture12010098 - 11 Jan 2022
Cited by 14 | Viewed by 3331
Abstract
Different concentrations of compost applied as organic fertilizer can modify productive, quality, and chemical parameters in several fruit tree species. The objective of this study was to determine the effect of increasing applications of compost on physiological, productive, and quality parameters in calafate [...] Read more.
Different concentrations of compost applied as organic fertilizer can modify productive, quality, and chemical parameters in several fruit tree species. The objective of this study was to determine the effect of increasing applications of compost on physiological, productive, and quality parameters in calafate fruit during the seasons of 2018–2019 and 2019–2020. The study was conducted on a commercial calafate orchard using a randomized complete block design with four treatments (CK: no compost application, T1: 5 Ton ha−1, T2: 10 Ton ha−1, and T3: 15 Ton ha−1), each with four repetitions. The results did not show statistical significance for stomatal conductance (Gs), quantum yield of PSII, or photosynthetic active radiation (PAR) within treatments. As for fruit yield, a statistical difference was found between the control treatment and T1, which were lower than T2 and T3 in both seasons. The trees reached a higher leaf area index with T2 in both seasons. The highest antioxidant capacity was obtained with T3 and T2 for the first and second season, respectively. Polyphenols and total anthocyanin production showed statistical significance, with a higher content at the second season with T2. It is concluded that the dose under which yield, quality, and nutraceutical content of calafate fruit are optimized is the one used in T2, 10 Ton ha−1. Full article
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14 pages, 4061 KiB  
Article
Enhancement of Interplanting of Ficus carica L. with Taxus cuspidata Sieb. et Zucc. on Growth of Two Plants
by Xue Yang, Yuzheng Li, Chunying Li, Qianqian Li, Bin Qiao, Sen Shi and Chunjian Zhao
Agriculture 2021, 11(12), 1276; https://doi.org/10.3390/agriculture11121276 - 15 Dec 2021
Cited by 7 | Viewed by 3018
Abstract
Medicinal-agroforestry systems are one of the multi-functional medicinal plant production systems, gaining attention as a sustainable alternative to traditional monoculture systems. In this study, three planting patterns were established which included: (1) monoculture F. carica (MF); (2) monoculture T. cuspidata (MT); and (3) [...] Read more.
Medicinal-agroforestry systems are one of the multi-functional medicinal plant production systems, gaining attention as a sustainable alternative to traditional monoculture systems. In this study, three planting patterns were established which included: (1) monoculture F. carica (MF); (2) monoculture T. cuspidata (MT); and (3) interplanting F. carica with T. cuspidata (IFT). The differences of growth biomass, photosynthesis, soil nutrients, soil enzyme activities, soil microorganisms, and main secondary metabolites of F. carica and T. cuspidata under the above three models were investigated. Compared with the MF and MT patterns, IFT pattern for 5 months significantly increased the plant growth biomass, photosynthesis, soil organic carbon, total nitrogen, and secondary metabolites content. The activities of acid phosphatase, sucrase, protease, polyphenol oxidase, urease, dehydrogenase, and catalase in soil of IFT were significantly higher than MF and MT patterns. Results showed that IFT pattern is preferred compared to the MF and MT patterns. Our result will help to provide a feasible theoretical basis for the large-scale establishment of F. carica and T. cuspidata mixed forests and obtain high-quality medicine sources for extracting important active ingredients, psoralen and paclitaxel, which are crucial to the long-term sustainable development and production of medicinal plants. Full article
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10 pages, 1051 KiB  
Article
Pre-Germination Treatments, Temperature, and Light Conditions Improved Seed Germination of Passiflora incarnata L.
by Luciana G. Angelini, Clarissa Clemente and Silvia Tavarini
Agriculture 2021, 11(10), 937; https://doi.org/10.3390/agriculture11100937 - 28 Sep 2021
Cited by 5 | Viewed by 4846
Abstract
Perennial medicinal and aromatic plants (MAPs) may represent interesting, environmentally friendly crops for the Mediterranean environments. Among MAPs, Passiflora incarnata L. (maypop) represents a very promising crop for its wide adaptability to diverse climatic conditions, low input requirements, and high added-value due to [...] Read more.
Perennial medicinal and aromatic plants (MAPs) may represent interesting, environmentally friendly crops for the Mediterranean environments. Among MAPs, Passiflora incarnata L. (maypop) represents a very promising crop for its wide adaptability to diverse climatic conditions, low input requirements, and high added-value due to its unique medicinal properties. The main problem in P. incarnata large-scale cultivation is the poor seed quality with erratic and low seed germination, due to its apparent pronounced seed dormancy. Therefore, the aim of this work was to investigate different chemical and physical treatments for overpassing seed dormancy and enhancing seed germination rates of P. incarnata. The effects of (i) different pre-germination treatments (pre-chilling, gibberellic acid—GA3, leaching, scarification, non-treated control), (ii) light or darkness exposure, and (iii) temperature conditions (25, 30, and 35 °C constant and 20–30 °C alternating temperatures) have been examined in seed germination percentage and mean germination time of three P. incarnata accessions (F2016, FF2016, and A2016) grown in field conditions in Central Italy. Data showed that the pre-germination treatments generally stimulated faster germination compared to the control, with the best results obtained in the dark and with high temperatures. These findings are useful for the choice of the most suitable seed pre-germination treatment that can facilitate stable, high and agronomically acceptable germination rates in P. incarnata. Full article
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14 pages, 1674 KiB  
Article
Cultivating for the Industry: Cropping Experiences with Hypericum perforatum L. in a Mediterranean Environment
by Silvia Lazzara, Alessandra Carrubba and Edoardo Napoli
Agriculture 2021, 11(5), 446; https://doi.org/10.3390/agriculture11050446 - 15 May 2021
Cited by 8 | Viewed by 3403
Abstract
Hypericum perforatum is an intensively studied medicinal plant, and much experimental activity has been addressed to evaluate its bio-agronomical and phytochemical features as far. In most cases, plant material used for experimental purposes is obtained from wild populations or, alternatively, from individuals grown [...] Read more.
Hypericum perforatum is an intensively studied medicinal plant, and much experimental activity has been addressed to evaluate its bio-agronomical and phytochemical features as far. In most cases, plant material used for experimental purposes is obtained from wild populations or, alternatively, from individuals grown in vases and/or pots. When Hypericum is addressed to industrial purposes, the most convenient option for achieving satisfactory amounts of plant biomass is field cultivation. Pot cultivation and open field condition, however, are likely to induce different responses on plant’s metabolism, and the obtained yield and composition are not necessarily the same. To compare these management techniques, a 4-year cultivation trial (2013–2016) was performed, using three Hypericum biotypes obtained from different areas in Italy: PFR-TN, from Trento province, Trentino; PFR-SI, from Siena, Tuscany; PFR-AG, from Agrigento province, Sicily. Both managements gave scarce biomass and flower yields at the first year, whereas higher yields were measured at the second year (in open field), and at the third year (in pots). Plant ageing induced significant differences in phytochemical composition, and the total amount of phenolic substances was much higher in 2015 than in 2014. A different performance of genotypes was observed; the local genotype was generally more suitable for field cultivation, whereas the two non-native biotypes performed better in pots. Phytochemical profile of in-pots plants was not always reflecting the actual situation of open field. Consequently, when cultivation is intended for industrial purposes, accurate quality checks of the harvested material are advised. Full article
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18 pages, 2198 KiB  
Article
Four-Year Study on the Bio-Agronomic Response of Biotypes of Capparis spinosa L. on the Island of Linosa (Italy)
by Salvatore La Bella, Francesco Rossini, Mario Licata, Giuseppe Virga, Roberto Ruggeri, Nicolò Iacuzzi, Claudio Leto and Teresa Tuttolomondo
Agriculture 2021, 11(4), 327; https://doi.org/10.3390/agriculture11040327 - 7 Apr 2021
Cited by 7 | Viewed by 2578
Abstract
The caper plant is widespread in Sicily (Italy) both wild in natural habitats and as specialized crops, showing considerable morphological variation. However, although contributing to a thriving market, innovation in caper cropping is low. The aim of the study was to evaluate agronomic [...] Read more.
The caper plant is widespread in Sicily (Italy) both wild in natural habitats and as specialized crops, showing considerable morphological variation. However, although contributing to a thriving market, innovation in caper cropping is low. The aim of the study was to evaluate agronomic and production behavior of some biotypes of Capparis spinosa L. subsp. rupestris, identified on the Island of Linosa (Italy) for growing purposes. Two years and seven biotypes of the species were tested in a randomized complete block design. The main morphological and production parameters were determined. Phenological stages were also observed. Analysis of variance showed high variability between the biotypes. Principal component analysis and cluster analysis highlighted a clear distinction between biotypes based on biometric and production characteristics. Production data collected in the two-year period 2007–2008 showed the greatest production levels in the third year following planting in 2005. In particular, biotype SCP1 had the highest average value (975.47 g) of flower bud consistency. Our results permitted the identification of biotypes of interest for the introduction into new caper fields. Further research is needed in order to characterize caper biotypes in terms of the chemical composition of the flower buds and fruits. Full article
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14 pages, 2779 KiB  
Article
Flavouring Extra-Virgin Olive Oil with Aromatic and Medicinal Plants Essential Oils Stabilizes Oleic Acid Composition during Photo-Oxidative Stress
by Salvatore Barreca, Salvatore La Bella, Antonella Maggio, Mario Licata, Silvestre Buscemi, Claudio Leto, Andrea Pace and Teresa Tuttolomondo
Agriculture 2021, 11(3), 266; https://doi.org/10.3390/agriculture11030266 - 20 Mar 2021
Cited by 28 | Viewed by 6772
Abstract
Essential oils (EOs) from medicinal and aromatic plants (MAPs) are well-known as natural antioxidants. Their addition to extra-virgin olive oil (EVOO) can contribute to reducing fat oxidation. The main aim of this study was to improve both food shelf-life and aromatic flavour of [...] Read more.
Essential oils (EOs) from medicinal and aromatic plants (MAPs) are well-known as natural antioxidants. Their addition to extra-virgin olive oil (EVOO) can contribute to reducing fat oxidation. The main aim of this study was to improve both food shelf-life and aromatic flavour of EVOO, adding different EOs of Sicilian accessions of common sage, oregano, rosemary and thyme. The morphological and production characteristics of 40 accessions of MAPs were preliminarily assessed. EOs from the most promising accessions of MAPs were analysed by gas-chromatography and mass spectrometry. Photo-oxidative studies of the EOs were carried out and the determination of the EVOO fatty acids obtained from 4 Italian olive varieties was also made. EO content was on average 1.45% (v/w) for common sage, 3.97% for oregano, 1.42% for rosemary and 5.90% for thyme accessions. The highest average EO yield was found in thyme (172.70 kg ha−1) whilst the lowest (9.30 kg ha−1) in rosemary accessions. The chemical composition of EOs was very different in the four MAPs in the study. No significant change of oleic acid percentage was detected in the mixture of EVOO with EO samples. The results seem to highlight the presence of an antioxidant effect of EOs on EVOO. Full article
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17 pages, 1445 KiB  
Article
Stevia rebaudiana (Bertoni) as a Multifunctional and Sustainable Crop for the Mediterranean Climate
by Clarissa Clemente, Luciana G. Angelini, Roberta Ascrizzi and Silvia Tavarini
Agriculture 2021, 11(2), 123; https://doi.org/10.3390/agriculture11020123 - 4 Feb 2021
Cited by 18 | Viewed by 4497
Abstract
Stevia rebaudiana (Bertoni) is a promising medicinal and aromatic plant for Mediterranean agroecosystems given its positive agronomic attributes and interesting quality features. It has both food and pharmaceutical applications, since its leaves contain sweet-tasting steviol glycosides (SVglys) and bioactive compounds, such as phenolics, [...] Read more.
Stevia rebaudiana (Bertoni) is a promising medicinal and aromatic plant for Mediterranean agroecosystems given its positive agronomic attributes and interesting quality features. It has both food and pharmaceutical applications, since its leaves contain sweet-tasting steviol glycosides (SVglys) and bioactive compounds, such as phenolics, flavonoids, and vitamins. We evaluated the agronomic and qualitative performances of nine stevia genotypes cultivated, in open field conditions, for two consecutive years under the Mediterranean climate of central Italy. Growth, biomass production, and accumulation of bioactive compounds (SVglys, polyphenols, and their related antioxidant activities) were evaluated, considering the effect of harvest time and crop age (first and second year of cultivation). The results showed high variability among genotypes in terms of both morpho-productive and phytochemical characteristics. In general, greater leaf dry yields, polyphenol accumulation, and antioxidant activities were found in the second year of cultivation, harvesting the plants in full vegetative growth. On the other hand, total SVglys leaf content reached the highest values in the first year when plants were at the beginning of the reproductive phase. On the other hand, although the SVglys profile (Rubusoside, Dulcoside A, Stevioside, Rebaudioside A, C, D, E, and M) remained stable over harvest times, it differed significantly depending on the crop age and genotype. Our findings provide useful information on the influence of crop age and harvest time in defining quanti-qualitative traits in stevia, with PL, SL, BR5, and SW30 being the best performing genotypes and thus suitable for breeding programs. Our study highlighted that stevia, in the tested environment, represents a promising semi-perennial crop which offers new solutions in terms of cropping system diversification and marketing opportunities. Full article
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16 pages, 1035 KiB  
Article
Antiarthritic Potential of Calotropis procera Leaf Fractions in FCA-Induced Arthritic Rats: Involvement of Cellular Inflammatory Mediators and Other Biomarkers
by Vandana S. Singh, Shashikant C. Dhawale, Faiyaz Shakeel, Md. Faiyazuddin and Sultan Alshehri
Agriculture 2021, 11(1), 68; https://doi.org/10.3390/agriculture11010068 - 15 Jan 2021
Cited by 17 | Viewed by 4763
Abstract
Calotropis procera (commonly known as Swallow wort) is described in the Ayurvedic literature for the treatment of inflammation and arthritic disorders. Therefore, in the present work, the antiarthritic activity of potential fractions of Swallow wort leaf was evaluated and compared with standards (indomethacin [...] Read more.
Calotropis procera (commonly known as Swallow wort) is described in the Ayurvedic literature for the treatment of inflammation and arthritic disorders. Therefore, in the present work, the antiarthritic activity of potential fractions of Swallow wort leaf was evaluated and compared with standards (indomethacin and ibuprofen). This study was designed in Wistar rats for the investigation of antiarthritic activity and acute toxicity of Swallow wort. Arthritis was induced in Wistar rats by injecting 0.1 mL of Freund’s complete adjuvant (FCA) on the 1st and 7th days subcutaneously into the subplantar region of the left hind paw. Evaluation of our experimental findings suggested that antiarthritic activity of methanol fraction of Swallow wort (MFCP) was greater than ethyl acetate fraction of Swallow wort (EAFCP), equal to standard ibuprofen, and slightly lower than standard indomethacin. MFCP significantly reduced paw edema on the 17th, 21st, 24th, and 28th days. It also showed significant effect (p < 0.01) on arthritic score, paw withdrawal latency, and body weight. The inhibition of serum lysosomal enzymes and proinflammatory cytokines along with improvement of radiographic features of hind legs was also recorded with MFCP. Finally, it was concluded that MFCP can be a feasible therapeutic candidate for the treatment of inflammatory arthritis. Full article
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15 pages, 1912 KiB  
Article
Effects of Irrigation, Peat-Alternative Substrate and Plant Habitus on the Morphological and Production Characteristics of Sicilian Rosemary (Rosmarinus officinalis L.) Biotypes Grown in Pot
by Salvatore La Bella, Giuseppe Virga, Nicolò Iacuzzi, Mario Licata, Leo Sabatino, Beppe Benedetto Consentino, Claudio Leto and Teresa Tuttolomondo
Agriculture 2021, 11(1), 13; https://doi.org/10.3390/agriculture11010013 - 28 Dec 2020
Cited by 14 | Viewed by 3669
Abstract
Irrigation and growing substrate are considered as essential cultivation practices in order to obtain good productive and qualitative performance of potted rosemary plants. In pot growing, the chemical, physical and biological characteristics of the substrate must be stable over time in order to [...] Read more.
Irrigation and growing substrate are considered as essential cultivation practices in order to obtain good productive and qualitative performance of potted rosemary plants. In pot growing, the chemical, physical and biological characteristics of the substrate must be stable over time in order to allow regular plant growth. However, the effects of cultivation techniques on the characteristics of potted rosemary are little known. Peat is traditionally used as the organic growing medium; however, despite numerous advantages, its use has determined a degradation of peatlands in the northern hemisphere and an increase in greenhouse gases in the atmosphere. The aim of the present study was to assess the effects of irrigation and peat-alternative substrates on the morphological, aesthetic and production characteristics of potted Sicilian rosemary biotypes with different habitus types. Two years, two different irrigation levels, three peat-alternative substrates and three types of rosemary plant habitus were tested in a split-split-split-plot design for a four-factor experiment. The results highlight that irrigation and substrate determined significant differences for all tested parameters. Rosemary plants demonstrated the best performances when irrigation was more frequent; vice versa, the greatest percent content in essential oil was obtained when irrigation events were less frequent. The chemical–physical characteristics of peat-alternative substrates changed with decreases in the peat content and increases in the compost content. The erect habitus biotype showed the best adaptation capacity to the various treatments. Our results suggest that irrigation and peat-alternative substrates significantly affect the growth of rosemary plants and should, therefore, be taken into consideration in order to improve the cultivation of this species in pots for ornamental purposes. Full article
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18 pages, 1779 KiB  
Article
Environmental Effects on Yield and Composition of Essential Oil in Wild Populations of Spike Lavender (Lavandula latifolia Medik.)
by Montserrat Fernández-Sestelo and José M. Carrillo
Agriculture 2020, 10(12), 626; https://doi.org/10.3390/agriculture10120626 - 12 Dec 2020
Cited by 36 | Viewed by 4918
Abstract
Spike lavender, Lavandula latifolia Medik., is a species of economic importance for its essential oil (EO). The purpose of this study was to estimate the effect of the variable climate and fixed factors such as soil and geographic location on EO yield and [...] Read more.
Spike lavender, Lavandula latifolia Medik., is a species of economic importance for its essential oil (EO). The purpose of this study was to estimate the effect of the variable climate and fixed factors such as soil and geographic location on EO yield and quality. The study material was collected in 34 populations from four different Spanish bioregions for three years. The EO extraction from spike lavender leaves and flowers was done with simple hydrodistillation, in Clevenger. Soil samples were also collected. Climate data were provided by the State Meteorological Agency. The EO average yield was obtained for the bioregion mean and in each bioregion. The higher EO yield is related clearly to the climate condition. A greater amount of annual rainfall produced a higher EO yield in the four bioregions and of better quality. Soils richer in organic matter and minerals produced higher EO yield but with less quality. The altitude had little effect on EO yield. Higher altitude favored obtaining higher EO quality. At lower latitude, further south, the populations obtained a higher EO yield. The evaluation of the environmental effect on the EO yield and quality could allow better natural conservation and more accurate selection of the best populations for breeding and spike lavender cultivation protocols. Full article
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19 pages, 3469 KiB  
Article
Design and Implementation of a Smart System to Control Aromatic Herb Dehydration Process
by Pietro Catania, Raimondo Gaglio, Santo Orlando, Luca Settanni and Mariangela Vallone
Agriculture 2020, 10(8), 332; https://doi.org/10.3390/agriculture10080332 - 5 Aug 2020
Cited by 12 | Viewed by 3545
Abstract
Drying is a process aimed at reducing the water content in plant materials below a limit where the activity of microbes and decomposing enzymes deteriorate the quality of medicinal and aromatic plants. Today, the interest of consumers towards medicinal and aromatic herbs has [...] Read more.
Drying is a process aimed at reducing the water content in plant materials below a limit where the activity of microbes and decomposing enzymes deteriorate the quality of medicinal and aromatic plants. Today, the interest of consumers towards medicinal and aromatic herbs has registered a growing trend. This study aims at designing a low-cost real-time monitoring and control system for the drying process of aromatic herbs and evaluating drying efficacy on the microbial community associated with the studied herbs. Hot-air drying tests of sage and laurel leaves were carried out in a dryer desiccator cabinet at 40 °C and 25% relative humidity using three biomass densities (3, 4 and 5 kg/m2). The prototype of the smart system is based on an Arduino Mega 2560 board, to which nine Siemens 7MH5102-1PD00 load cells and a DHT22 temperature and humidity sensor were added. The data acquired by the sensors were transmitted through Wi-Fi to a ThingSpeak account in order to monitor the drying process in real time. The variation in the moisture content of the product and the drying rate were obtained. The system provided a valid support decision during the drying process, allowing for the precise monitoring of the evolution of the biomass moisture loss and drying rate for laurel and sage. The three different biomass densities employed did not provide significant differences in the drying process for sage. Statistically significant differences among the three tests were found for laurel in the final part of the process. The microbial loads of the aromatic herbs after drying were influenced by the different leaf structures of the species; in particular, with laurel leaves, microbial survival increased with increasing biomass density. Finally, with the drying method adopted, the two species under consideration showed a different microbial stability and, consequently, had a different shelf life, longer for sage than laurel, as also confirmed by water activity (aw) values. Full article
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Review

Jump to: Editorial, Research

21 pages, 1913 KiB  
Review
Hops (Humulus lupulus L.) as a Novel Multipurpose Crop for the Mediterranean Region of Europe: Challenges and Opportunities of Their Cultivation
by Francesco Rossini, Giuseppe Virga, Paolo Loreti, Nicolò Iacuzzi, Roberto Ruggeri and Maria Elena Provenzano
Agriculture 2021, 11(6), 484; https://doi.org/10.3390/agriculture11060484 - 24 May 2021
Cited by 40 | Viewed by 11767
Abstract
The common hop (Humulus lupulus L.) is a dioecious perennial climbing plant, mainly known for the use of its female inflorescences (cones or, simply, “hops”) in the brewing industry. However, the very first interest towards hops was due to its medicinal properties. [...] Read more.
The common hop (Humulus lupulus L.) is a dioecious perennial climbing plant, mainly known for the use of its female inflorescences (cones or, simply, “hops”) in the brewing industry. However, the very first interest towards hops was due to its medicinal properties. Actually, the variety of compounds present in almost all plant parts were (and still are) used to treat or prevent several ailments and metabolic disorders, from insomnia to menopausal symptoms as well as obesity and even cancer. Although hops are predominantly grown for hopping beer, the increasing interest in natural medicine is widening new interesting perspectives for this crop. Moreover, the recent success of the craft beer sector all over the world, made the cultivated hop come out from its traditional growing areas. Particularly, in Europe this resulted in a movement towards southern countries such as Italy, which added itself to the already existing hop industry in Portugal and Spain. In these relatively new environments, a complete knowledge and expertise of hop growing practices is lacking. Overall, while many studies were conducted globally on phytochemistry, bioactivity, and the genetics of hops, results from public research activity on basic hop agronomy are very few and discontinuous as well. The objective of this article is to provide an overview of possible uses, phenology, and agronomic aspects of hops, with specific reference to the difficulties and opportunities this crop is experiencing in the new growing areas, under both conventional and organic farming. The present review aims to fill a void still existing for this topic in the literature and to give directions for farmers that want to face the cultivation of such a challenging crop. Full article
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