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Agronomy
Special Issues
Water and Nitrogen Use Efficiency of Horticultural Crops under Abiotic...
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Water and Nitrogen Use Efficiency of Horticultural Crops under Abiotic Stress

A special issue of Agronomy (ISSN 2073-4395). This special issue belongs to the section "Horticultural and Floricultural Crops".

Deadline for manuscript submissions: closed (15 March 2022) | Viewed by 7528

Special Issue Editors

Dr. Alessandro Miceli

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Guest Editor
Department of Agricultural, Food and Forestry Sciences, University of Palermo, Viale delle Scienze, 90128 Palermo, Italy
Interests: horticulture; floriculture; plant protection; sustainable agriculture; salt stress; plant biostimulants; phytohormones; postharvest; fruit quality
Special Issues, Collections and Topics in MDPI journals
Dr. Alessandra Moncada

E-Mail Website
Guest Editor
Department of Agricultural, Food and Forestry Sciences, University of Palermo, Viale delle Scienze, 90128 Palermo, Italy
Interests: soilless cultivation; plant nutrition; nutrient solutions; organic farming; biostimulants; phytohormones
Special Issues, Collections and Topics in MDPI journals
Dr. Filippo Vetrano

E-Mail Website
Guest Editor
Department of Agricultural, Food and Forestry Sciences, University of Palermo, Viale delle Scienze, 90128 Palermo, Italy
Interests: horticulture production; cut flower production; crop management; compost production; plant hormones, biostimulants
Special Issues, Collections and Topics in MDPI journals

Special Issue Information

Dear Colleagues,

Horticultural crops are facing more and more issues related to abiotic stresses. Their effects depend on the type of stress, its intensity, and the duration of the stressful condition. Abiotic stress, such as cold, heat, drought, flooding, salinity, nutrient deficiency, heavy metals, ozone, and ultraviolet radiation affect multiple physiological and biochemical mechanisms in plants and, therefore, influence the growth of horticultural crops and their efficiency in using growth factors such as nutrients and water. Thus, crop management under stress conditions could be very challenging and needs a deeper knowledge of plant response to the agronomic practice to reach the goal of sustainable production. The use of innovative agricultural practices for the early detection and counteraction of abiotic stress effects and the preservation of crop productivity could lead to better management of resources such as nitrogen and water and enhance their use efficiency.

This Special Issue aims to collect research papers and reviews focusing on “Water and Nitrogen Use Efficiency of Horticultural Crops under Abiotic Stress”. Therefore, research articles, reviews, short notes, and opinion articles related to the mechanisms underlying water and nitrogen use of horticultural crops under abiotic stress are welcome for this Special Issue.

Prof. Dr. Alessandro Miceli
Dr. Alessandra Moncada
Dr. Filippo Vetrano
Guest Editors

Manuscript Submission Information

Manuscripts should be submitted online at www.mdpi.com by registering and logging in to this website. Once you are registered, click here to go to the submission form. Manuscripts can be submitted until the deadline. All submissions that pass pre-check are peer-reviewed. Accepted papers will be published continuously in the journal (as soon as accepted) and will be listed together on the special issue website. Research articles, review articles as well as short communications are invited. For planned papers, a title and short abstract (about 100 words) can be sent to the Editorial Office for announcement on this website.

Submitted manuscripts should not have been published previously, nor be under consideration for publication elsewhere (except conference proceedings papers). All manuscripts are thoroughly refereed through a single-blind peer-review process. A guide for authors and other relevant information for submission of manuscripts is available on the Instructions for Authors page. Agronomy is an international peer-reviewed open access monthly journal published by MDPI.

Please visit the Instructions for Authors page before submitting a manuscript. The Article Processing Charge (APC) for publication in this open access journal is 2600 CHF (Swiss Francs). Submitted papers should be well formatted and use good English. Authors may use MDPI's English editing service prior to publication or during author revisions.

Keywords

  • heat and drought stress
  • cold stress
  • salinity and flooding
  • stress responses
  • stress tolerance
  • stress hormones
  • agronomic tools
  • biostimulants
  • crop yield and quality

Published Papers (2 papers)

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Research

14 pages, 2640 KiB  
Article
Growth, Quality, and Nitrogen Assimilation in Response to High Ammonium or Nitrate Supply in Cabbage (Brassica campestris L.) and Lettuce (Lactuca sativa L.)
by Jinnan Song, Jingli Yang and Byoung Ryong Jeong
Agronomy 2021, 11(12), 2556; https://doi.org/10.3390/agronomy11122556 - 16 Dec 2021
Cited by 19 | Viewed by 3242
Abstract
Plants grow better when they are supplied with a combination of ammonium (NH4+) and nitrate (NO3−) than when either one is supplied as the sole N (nitrogen) source. However, the effects of N forms on N metabolism [...] Read more.
Plants grow better when they are supplied with a combination of ammonium (NH4+) and nitrate (NO3−) than when either one is supplied as the sole N (nitrogen) source. However, the effects of N forms on N metabolism and major N assimilation enzymes in different plants, especially vegetables, are largely neglected. This study was conducted on two plants with distinct NH4+ tolerances to compare the responses of two popular leafy vegetables, Korean cabbage (Brassica campestris L.) ‘Ssamchu’ and lettuce (Lactuca sativa L.) ‘Caesar green’, to the N source. To this end, plant growth and quality, photosynthesis, carbohydrate, N contents (in the forms of NO3−, NO2−, NH4+, total protein), and key N assimilation-related enzyme (NR, NIR, GS, GDH) activities were investigated. When plants were subjected to one of three NH4+:NO3− regimes, 0:100, 50:50, or 100:0, lettuce was relatively more tolerant while cabbage was extremely sensitive to high NH4+. Both plants benefited more from being grown with 50:50 NH4+:NO3−, as evidenced by the best growth performance, ameliorated photosynthesis, and enriched carbohydrate (C) stock content. In addition, as compared to cabbage, the GS and GDH activities were reinforced in lettuce in response to an increasing external NH4+ level, resulting in low NH4+ accumulation. Our findings suggested that boosting or maintaining high GS and GDH activities is an important strategy for the ammonium tolerance in vegetables. Full article
(This article belongs to the Special Issue Water and Nitrogen Use Efficiency of Horticultural Crops under Abiotic Stress)
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25 pages, 2196 KiB  
Article
Use of Microbial Biostimulants to Increase the Salinity Tolerance of Vegetable Transplants
by Alessandro Miceli, Alessandra Moncada and Filippo Vetrano
Agronomy 2021, 11(6), 1143; https://doi.org/10.3390/agronomy11061143 - 03 Jun 2021
Cited by 34 | Viewed by 3525
Abstract
Vegetable plants are more sensitive to salt stress during the early growth stages; hence, the availability of poor-quality brackish water can be a big issue for the nursery vegetable industry. Microbial biostimulants promote growth and vigor and counterbalance salt stress in mature plants. [...] Read more.
Vegetable plants are more sensitive to salt stress during the early growth stages; hence, the availability of poor-quality brackish water can be a big issue for the nursery vegetable industry. Microbial biostimulants promote growth and vigor and counterbalance salt stress in mature plants. This study aimed to evaluate the application of plant growth-promoting microorganisms for improving salt tolerance of lettuce and tomato seedlings irrigated with different water salinity levels (0, 25, and 50 mM NaCl) during nursery growth. Two commercial microbial biostimulants were applied to the substrate before seeding: 1.5 g L−1 of TNC BactorrS13 containing 1.3 × 108 CFU g−1 of Bacillus spp.; 0.75 g L−1 of Flortis Micorrize containing 30% of Glomus spp., 1.24 × 108 CFU g−1 of Agrobacterium radiobacter, Bacillus subtilis, Streptomyces spp. and 3 × 105 CFU g−1 of Thricoderma spp. Many morpho-physiological parameters of lettuce and tomato seedlings suffered the negative effect of salinity. The use of the microbial biostimulants modified seedling growth and its response to salt stress. They had a growth-promoting effect on the unstressed seedlings increasing fresh and dry biomass accumulation, leaf number, and leaf area and were successful in increasing salinity tolerance of seedlings especially when using Flortis Micorizze that enhanced salinity tolerance up to 50 mM NaCl. The inoculation of the substrate with microbial biostimulants could represent a sustainable way to improve lettuce and tomato transplant quality and to use brackish water in vegetable nurseries limiting its negative effect on seedling growth. Full article
(This article belongs to the Special Issue Water and Nitrogen Use Efficiency of Horticultural Crops under Abiotic Stress)
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