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Alleviating Salinity-Alkalinity Stress through Plant Nutrition, Beneficial Elements, Biofertilizers and...
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Alleviating Salinity-Alkalinity Stress through Plant Nutrition, Beneficial Elements, Biofertilizers and Biostimulants

A special issue of Plants (ISSN 2223-7747). This special issue belongs to the section "Plant Nutrition".

Deadline for manuscript submissions: closed (20 July 2022) | Viewed by 6715

Special Issue Editors

Dr. Luis Alonso Valdez-Aguilar

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Guest Editor
Departamento de Horticultura, Universidad Autónoma Agraria Antonio Narro, Saltillo 25315, Mexico
Interests: plant nutrition; hydroponics; soilless culture; salinity and alkalinity in irrigation water; greenhouse crops; vertical farming; plant factory
Dr. Andrew D. Cartmill

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Guest Editor
School of Agriculture, University of Wisconsin-Platteville, Platteville, WI, USA
Interests: mycorrhizal associations during production; plant response to environmental and production stresses; water quality; plant nutrition; below ground responses (root dynamics, soil respiration) to climate change drivers, grazing, and production

Special Issue Information

Dear Colleagues,                  

Salinity and alkalinity are major threats to the resiliency and productivity of agricultural production systems. Soil salinity increases crop water and fertilizer requirements and impacts up to 1.5 million ha of farmland every year (FAO, 2021) due to the accumulation of ions (sodium, chloride, calcium, sulfate, etc.) through irrigation or seawater intrusion in coastal areas. Soil alkalinity may be aggravated by irrigation with water high in carbonates and/or bicarbonates, the main alkalinity-inducing substances, which in turn may impose pH stress. Plants respond to salinity and alkalinity by exhibiting reduced growth, osmotic adjustment, oxidative damage, nutrient imbalance, and impaired physiological processes, including photosynthesis. In order to sustain food, fiber, and fuel production for an increasing world population, it is necessary to identify and implement novel and environmentally sound solutions which increase crop tolerance to salinity and alkalinity stress. This Special Issue of Plants is timely as it provides an excellent opportunity for researchers and interested stakeholders to review the current understanding of the physiology, growth, and management of salinity and alkalinity stress in plant production systems. Here we intend to promote advancements in plant tolerance to salinity and alkalinity, from novel approaches such as nutrient management and the application of beneficial elements, microorganisms, and stimulant molecules. Ultimately our goal is to provide accessibility and visibility to this important research area and encourage new lines of investigation.

Dr. Luis Alonso Valdez-Aguilar
Dr. Andrew D. Cartmill
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. Plants is an international peer-reviewed open access semimonthly 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 2700 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

  • soil and water electrical conductivity
  • soil and water pH
  • osmotic stress
  • nutrient imbalance
  • micronutrient availability
  • mycorrhizal associations
  • rhizobacteria

Published Papers (2 papers)

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Research

18 pages, 3755 KiB  
Article
Potassium and Humic Acid Synergistically Increase Salt Tolerance and Nutrient Uptake in Contrasting Wheat Genotypes through Ionic Homeostasis and Activation of Antioxidant Enzymes
by Ghulam Abbas, Sadia Rehman, Manzer H. Siddiqui, Hayssam M. Ali, Muhammad Ansar Farooq and Yinglong Chen
Plants 2022, 11(3), 263; https://doi.org/10.3390/plants11030263 - 19 Jan 2022
Cited by 19 | Viewed by 2635
Abstract
Salinity limits the growth and nutrient uptake in crop species. Studies show that both potassium (K) and humic acid (HA) improved plant tolerance to salinity. However, the interactive effect of K and HA on plant tolerance to salinity stress remains unknown. This pot [...] Read more.
Salinity limits the growth and nutrient uptake in crop species. Studies show that both potassium (K) and humic acid (HA) improved plant tolerance to salinity. However, the interactive effect of K and HA on plant tolerance to salinity stress remains unknown. This pot study examined the effect of application of K (0, 5 or 10 mM) and HA (0 or 2 g kg−1), alone or in combination, on the growth and physiology under salinity (100 mM NaCl) in two wheat genotypes (SARC 1, salt tolerant; and SARC 5, salt sensitive). The results revealed that salt stress reduced shoot biomass by 35% and 49% in SARC 1 and SARC 5, respectively. Salinity induced overproduction of H2O2 and lipid peroxidation in both genotypes, but the decline in pigments and stomatal conductance was more profound in SARC 5 than in SARC 1. Combined application of 10 mM K and HA was most effective in alleviating salt stress with improved plant biomass by 47% and 43% in SARC 1 and SARC 5, respectively. Combined application of 10 mM K and HA mitigated salt and induced oxidative stress with the activities of APX, CAT, POD and SOD increased by up to 2.8 folds in SARC 1, and by upto 2.5 folds in SARC 5, respectively. Root and shoot Na contents were increased, while K, Fe and Zn contents were decreased under saline conditions. HA combined with K decreased Na and increased K, Fe and Zn contents in both genotypes. Combined application of 10 mM K and HA was more promising for increasing wheat salt tolerance and nutrient uptake and genotype SARC 1 performed better than SARC 5 for cultivation on saline soils. Full article
(This article belongs to the Special Issue Alleviating Salinity-Alkalinity Stress through Plant Nutrition, Beneficial Elements, Biofertilizers and Biostimulants)
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20 pages, 2760 KiB  
Article
The Efficiency of Different Priming Agents for Improving Germination and Early Seedling Growth of Local Tunisian Barley under Salinity Stress
by Rim Ben Youssef, Nahida Jelali, Nadia Boukari, Alfonso Albacete, Cristina Martinez, Francisco Perez Alfocea and Chedly Abdelly
Plants 2021, 10(11), 2264; https://doi.org/10.3390/plants10112264 - 22 Oct 2021
Cited by 13 | Viewed by 3164
Abstract
The current work aimed to investigate the effect of seed priming with different agents (CaCl2, KCl, and KNO3) on germination and seedling establishment in seeds of the barley species of both Hordeum vulgare (L. Manel) and Hordeum maritimum germinated [...] Read more.
The current work aimed to investigate the effect of seed priming with different agents (CaCl2, KCl, and KNO3) on germination and seedling establishment in seeds of the barley species of both Hordeum vulgare (L. Manel) and Hordeum maritimum germinated with three salt concentrations (0, 100, and 200 mM NaCl). The results showed that under unprimed conditions, salt stress significantly reduced the final germination rate, the mean daily germination, and the seedling length and dry weight. It led to a decrease in the essential nutrient content (iron, calcium, magnesium, and potassium) against an increase in sodium level in both of the barley species. Moreover, this environmental constraint provoked a membrane injury caused by a considerable increase in electrolyte leakage and the malondialdehyde content (MDA). Data analysis proved that seed priming with CaCl2, KCl, and KNO3 was an effective method for alleviating barley seed germination caused by salt stress to varying degrees. Different priming treatments clearly stimulated germination parameters and the essential nutrient concentration, in addition to increasing the seedling growth rate. The application of seed priming reduced the accumulation of sodium ions and mitigated the oxidative stress of seeds caused by salt. This mitigation was traduced by the maintenance of low levels of MDA and electrolyte leakage. We conclude that the priming agents can be classed into three ranges based on their efficacy on the different parameters analyzed; CaCl2 was placed in the first range, followed closely by KNO3, while the least effective was KCl, which placed in the third range. Full article
(This article belongs to the Special Issue Alleviating Salinity-Alkalinity Stress through Plant Nutrition, Beneficial Elements, Biofertilizers and Biostimulants)
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