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Agronomy
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Novel Insights into Abiotic Stress Tolerance of Crops
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Novel Insights into Abiotic Stress Tolerance of Crops

A special issue of Agronomy (ISSN 2073-4395).

Deadline for manuscript submissions: 30 April 2024 | Viewed by 2849

Special Issue Editors

Dr. Tihana Marček

E-Mail Website
Guest Editor
Faculty of Food Technology, Josip Juraj Strossmayer University of Osijek, Franje Kuhača 18, 31000 Osijek, Croatia
Interests: plant stress biology; plant physiology; abiotic stress; biotic stress
Dr. Marija Viljevac Vuletić

E-Mail Website
Guest Editor
Agrochemical Laboratory, Agricultural Institute Osijek, HR-31000 Osijek, Croatia
Interests: abiotic stress; biotic stress; senescence; photosynthesis; chlorophyll fluorescence; stress defence mechanisms; ROS; phenolics
Special Issues, Collections and Topics in MDPI journals

Special Issue Information

Dear Colleagues,

One of the most crucial challenges for the agricultural sector is to counterbalance growing human population demands with unpredictable environmental influence. Abiotic stresses cause a plethora of disturbances in plant growth and development, limiting crop productivity. Despite high production, conventional agricultural tools are not desirable in the promotion of plant stress tolerance due to their detrimental and often unknown effects on the environment and human health.

The need for developing new, eco-friendly alternatives to create highly profitable genotypes with a wide range of tolerance specialized to respond to climate fluctuations, has become the top priority for human and animal food production. Fortunately, alternative ways of abiotic stress tolerance engineering have begun to receive greater attention in the research community.

As the guest editors of the upcoming Special Issue of Agronomy entitled “Novel Insights Into Abiotic Stress Tolerance of Crops”, we would like to invite you to participate by contributing the latest findings connected with novel biotechnological approaches and green technologies that have been implemented in abiotic stress studies and which could be beneficial in the remodeling and improvement of crop tolerance. Potential authors are encouraged to contribute to this Issue with discussions of environmentally friendly protocols and equipment in the form of original research, opinion articles, or reviews. This Issue will also cover all types of plant stress responses on cellular, biochemical, physiological, molecular, and metabolic levels.

Dr. Tihana Marček
Dr. Marija Viljevac Vuletić
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

  • drought
  • salinity
  • cold
  • heat
  • metal stress
  • crop tolerance
  • green technologies
  • biotechnology approach

Published Papers (3 papers)

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Research

18 pages, 4411 KiB  
Article
Agronomic and Physiological Traits Response of Three Tropical Sorghum (Sorghum bicolor L.) Cultivars to Drought and Salinity
by Elvira Sari Dewi, Issaka Abdulai, Gennady Bracho-Mujica, Mercy Appiah and Reimund P. Rötter
Agronomy 2023, 13(11), 2788; https://doi.org/10.3390/agronomy13112788 - 09 Nov 2023
Viewed by 1173
Abstract
Sorghum holds the potential for enhancing food security, yet the impact of the interplay of water stress and salinity on its growth and productivity remains unclear. To address this, we studied how drought and salinity affect physiological traits, water use, biomass, and yield [...] Read more.
Sorghum holds the potential for enhancing food security, yet the impact of the interplay of water stress and salinity on its growth and productivity remains unclear. To address this, we studied how drought and salinity affect physiological traits, water use, biomass, and yield in different tropical sorghum varieties, utilizing a functional phenotyping platform, Plantarray. Cultivars (Kuali, Numbu, Samurai2) were grown under moderate and high salinity, with drought exposure at booting stage. Results showed that Samurai2 had the most significant transpiration reduction under moderate and high salt (36% and 48%) versus Kuali (22% and 42%) and Numbu (19% and 16%). Numbu reduced canopy conductance (25% and 15%) the most compared to Samurai2 (22% and 33%) and Kuali (8% and 35%). In the drought*salinity treatment, transpiration reduction was substantial for Kuali (54% and 57%), Samurai2 (45% and 60%), and Numbu (29% and 26%). Kuali reduced canopy conductance (36% and 53%) more than Numbu (36% and 25%) and Samurai2 (33% and 49%). Biomass, grain yield, and a-100 grain weight declined in all cultivars under both salinity and drought*salinity, and Samurai2 was most significantly affected. WUEbiomass significantly increased under drought*salinity. Samurai2 showed reduced WUEgrain under drought*salinity, unlike Kuali and Numbu, suggesting complex interactions between water limitation and salinity in tropical sorghum. Full article
(This article belongs to the Special Issue Novel Insights into Abiotic Stress Tolerance of Crops)
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16 pages, 3058 KiB  
Article
Exogenous Xyloglucan Oligosaccharides Alleviate Cadmium Toxicity in Boehmeria nivea by Increasing the Cadmium Fixation Capacity of Cell Walls
by Yushen Ma, Hongdong Jie, Long Zhao, Ying Zhang, Pengliang He, Xueying Lv, Xiaochun Liu, Yan Xu and Yucheng Jie
Agronomy 2023, 13(11), 2786; https://doi.org/10.3390/agronomy13112786 - 09 Nov 2023
Cited by 1 | Viewed by 597
Abstract
Xyloglucan is an important component of hemicellulose, and xyloglucan oligosaccharides (Xh), which are metabolized by xyloglucan, play an important role in plant growth and development. However, the regulatory effects of the external application of Xh under cadmium (Cd) stress have not been determined. [...] Read more.
Xyloglucan is an important component of hemicellulose, and xyloglucan oligosaccharides (Xh), which are metabolized by xyloglucan, play an important role in plant growth and development. However, the regulatory effects of the external application of Xh under cadmium (Cd) stress have not been determined. In this study, we evaluated the mechanism by which Xh contributes to resistance to Cd stress in ramie, a candidate plant species for toxic ion removal. The external application of Xh effectively attenuated the effects of Cd on ramie growth and photosynthetic pigments. Cd stress can also inhibit the activity of antioxidant enzymes such as superoxide dismutase (SOD), catalase (CAT), peroxidase (POD), and ascorbate peroxidase (APX), resulting in a significant increase in the extent of membrane lipid peroxidation. After the external application of Xh, antioxidant enzyme activity was up-regulated, and damage to membranes in plants was reduced. In addition, the external application of Xh increased Cd retention in roots, thereby significantly decreasing Cd content in shoots. The external application of Xh also regulated the subcellular distribution of Cd and increased the Cd content of the cell wall. In particular, a root cell wall analysis revealed that Cd+Xh treatment significantly increased the hemicellulose content in the cell wall and the amount of Cd retained. In summary, the external application of Xh alleviates Cd toxicity in ramie by increasing the hemicellulose content and the Cd fixation ability of the cell wall and by reducing membrane lipid peroxidation via antioxidant enzymes. Full article
(This article belongs to the Special Issue Novel Insights into Abiotic Stress Tolerance of Crops)
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17 pages, 7107 KiB  
Article
Sugar Beet Rooting Pattern Mediates Stomatal and Transpiration Responses to Progressive Water Stress
by Gernot Bodner and Mouhannad Alsalem
Agronomy 2023, 13(10), 2519; https://doi.org/10.3390/agronomy13102519 - 29 Sep 2023
Viewed by 689
Abstract
Water stress is the main risk facing sugar beet production in Europe and is expected to worsen with climate change. Therefore, future production essentially depends on the traits that sustain growth during water shortages. In this study, we investigated the interplay of stomatal [...] Read more.
Water stress is the main risk facing sugar beet production in Europe and is expected to worsen with climate change. Therefore, future production essentially depends on the traits that sustain growth during water shortages. In this study, we investigated the interplay of stomatal conductance and transpiration rate as well as the root characteristics of six sugar beet cultivars in a climate chamber experiment under environmental conditions progressing from a non-stressed initial state toward high atmospheric water demand, followed by reduced soil water supply and then by a combination of high demand and low supply. Stomatal conductance quickly responded to changing conditions, dropping from 406.4 to 42.5 mmol m−2 s−1, one order of magnitude, with the transition to reduced soil water availability. The transpiration rate showed a slightly delayed response compared with stomatal conductance, while we observed an inverse influence on the subsequent stomatal behavior exerted by the depletion/conservation of available soil water. The rooting pattern substantially differed among genotypes, predominantly at depths between 60 and 80 cm, where 50.5% of the root length was allocated. Longer roots buffered the effects of the reduction in stomatal conductance at the onset of water supply limitation, with 5.4 mmol m−2 s−1 higher conductance per 100 cm of root length. Therefore, breeding and/or management measures targeting root system vigor are the key to the growth maintenance of sugar beet during dry periods. Full article
(This article belongs to the Special Issue Novel Insights into Abiotic Stress Tolerance of Crops)
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