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Agronomy
Special Issues
Identification of Traits Contributing to Salt Tolerance in Crops
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Identification of Traits Contributing to Salt Tolerance in Crops

A special issue of Agronomy (ISSN 2073-4395). This special issue belongs to the section "Soil and Plant Nutrition".

Deadline for manuscript submissions: closed (31 August 2020) | Viewed by 7224

Special Issue Editors

Prof. Dr. Ana I Ribeiro-Barros

E-Mail Website
Guest Editor
GeoBioTec, Faculdade de Ciências e Tecnologia (FCT), Universidade NOVA de Lisboa (UNL), 2829-516 Caparica, Portugal
Interests: plant–environment interactions; biodiversity
Special Issues, Collections and Topics in MDPI journals
Prof. Dr. Patrícia Santos

E-Mail Website
Guest Editor
Department of Biochemistry and Molecular Biology, University of Nevada, Reno, NV 89557, USA
Interests: Plant-Microbe Interactions
Prof. Dr. Dylan Kosma

E-Mail Website
Guest Editor
Department of Biochemistry and Molecular Biology, University of Nevada, Reno, NV 89557, USA
Interests: Role of lipid polymers in plant tolerance to abiotic stress

Special Issue Information

Dear Colleagues,

Climate change and population growth are the major challenges of the millennium. It is estimated that climate extreme events, such as gas emissions, heat and drought, and soil salinization will impose a loss of nearly half of all arable land by 2050. The latter is considered the most severe limiting factor for agriculture, affecting ca. 20% of the global cultivable area, with a predicted annual expansion rate of 10% in the coming decades. In this context, crop breeding towards salt tolerance is the elected strategy to cope with the imposed changes. This Special Issue aims to integrate research on the salt stress responses of crops, underused crops, and crop wild relatives towards the identification of useful traits for breeding programs.

Prof. Ana I Ribeiro-Barros
Prof. Patrícia Santos
Prof. Dylan Kosma
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

  • agriculture
  • breeding
  • climate change
  • crops
  • salt tolerance
  • soil salinization

Published Papers (2 papers)

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Research

16 pages, 2459 KiB  
Article
Wild and Cultivated Sunflower (Helianthus annuus L.) Do Not Differ in Salinity Tolerance When Taking Vigor into Account
by Vivian H. Tran, Andries A. Temme and Lisa A. Donovan
Agronomy 2020, 10(7), 1013; https://doi.org/10.3390/agronomy10071013 - 14 Jul 2020
Cited by 4 | Viewed by 3059
Abstract
Cultivated crops are expected to be less stress tolerant than their wild relatives, leading to efforts to mine wild relatives for traits to increase crop tolerance. However, empirical tests of this expectation often confound tolerance with plant vigor. We assessed whether wild and [...] Read more.
Cultivated crops are expected to be less stress tolerant than their wild relatives, leading to efforts to mine wild relatives for traits to increase crop tolerance. However, empirical tests of this expectation often confound tolerance with plant vigor. We assessed whether wild and cultivated Helianthus annuus L. differed for salinity tolerance with 0 and 150 mM NaCl treatments. Salinity tolerance was assessed as the proportional reduction in biomass and as the deviation from expected performance based on vigor. Cultivated accessions had a greater proportional decline in biomass than wild accessions, but proportional decline was positively associated with vigor in both. Thus, wild and cultivated H. annuus did not differ for tolerance when variation in vigor was corrected for statistically. For traits potentially related to tolerance mechanisms, wild and cultivated accessions differed for elemental content and allocation of N, P, K, Mg, Ca, S, Na, Fe, Mn, B, Cu, and Zn for some tissues, biomass allocation, specific leaf area, and leaf succulence. However, these traits were generally unrelated to tolerance corrected for vigor. Osmotic adjustment was associated with tolerance corrected for vigor only in wild accessions where more osmotic adjustment was associated with greater tolerance. Our results for H. annuus suggest that efforts to use wild relatives to enhance crop abiotic stress tolerance will benefit from greater knowledge of traits related to plant growth responses decoupled from vigor, in order to get beyond potential growth-tolerance trade-offs. Full article
(This article belongs to the Special Issue Identification of Traits Contributing to Salt Tolerance in Crops)
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20 pages, 1649 KiB  
Article
Physiological and Biochemical Responses to Salt Stress of Alfalfa Populations Selected for Salinity Tolerance and Grown in Symbiosis with Salt-Tolerant Rhizobium
by Annick Bertrand, Craig Gatzke, Marie Bipfubusa, Vicky Lévesque, Francois P. Chalifour, Annie Claessens, Solen Rocher, Gaëtan F. Tremblay and Chantal J. Beauchamp
Agronomy 2020, 10(4), 569; https://doi.org/10.3390/agronomy10040569 - 15 Apr 2020
Cited by 16 | Viewed by 3847
Abstract
Alfalfa and its rhizobial symbiont are sensitive to salinity. We compared the physiological responses of alfalfa populations inoculated with a salt-tolerant rhizobium strain, exposed to five NaCl concentrations (0, 20, 40, 80, or 160 mM NaCl). Two initial cultivars, Halo (H-TS0) and Bridgeview [...] Read more.
Alfalfa and its rhizobial symbiont are sensitive to salinity. We compared the physiological responses of alfalfa populations inoculated with a salt-tolerant rhizobium strain, exposed to five NaCl concentrations (0, 20, 40, 80, or 160 mM NaCl). Two initial cultivars, Halo (H-TS0) and Bridgeview (B-TS0), and two populations obtained after three cycles of recurrent selection for salt tolerance (H-TS3 and B-TS3) were compared. Biomass, relative water content, carbohydrates, and amino acids concentrations in leaves and nodules were measured. The higher yield of TS3-populations than initial cultivars under salt stress showed the effectiveness of our selection method to improve salinity tolerance. Higher relative root water content in TS3 populations suggests that root osmotic adjustment is one of the mechanisms of salt tolerance. Higher concentrations of sucrose, pinitol, and amino acid in leaves and nodules under salt stress contributed to the osmotic adjustment in alfalfa. Cultivars differed in their response to recurrent selection: under a 160 mM NaCl-stress, aromatic amino acids and branched-chain amino acids (BCAAs) increased in nodules of B-ST3 as compared with B-TS0, while these accumulations were not observed in H-TS3. BCAAs are known to control bacteroid development and their accumulation under severe stress could have contributed to the high nodulation of B-TS3. Full article
(This article belongs to the Special Issue Identification of Traits Contributing to Salt Tolerance in Crops)
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