Identifying drought-tolerant genotypes of faba bean and their agro-physiological responses to different water regimes in an arid Mediterranean environment

Mansour, Elsayed; Desoky, El-Sayed M.; Ali, Mahmoud A.; Abdul-Hamid, Mohamed I. E.; Ullah, Hayat; Attia, Ahmed; Datta, Avishek

doi:10.1016/j.agwat.2021.106754

Cited by 57 publications

(31 citation statements)

References 79 publications

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“…Se increased proline accumulation, which subsequently improved photosynthetic efficiency, ATP production and water use efficiency, as reported previously by Guo et al [80]. Proline is a non-enzymatic antioxidants and has a vital role in osmotic adjustment under salinity stress [55,[81][82][83][84]. It diminishes the negative impacts of ROS and boosts plant tolerance by diminishing the detoxification of ROS produced due to salt stress [85].…”

Section: Discussionsupporting

confidence: 58%

Physiological and Biochemical Mechanisms of Exogenously Applied Selenium for Alleviating Destructive Impacts Induced by Salinity Stress in Bread Wheat

et al. 2021

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Salinity is a major abiotic stress that poses great obstacles to wheat production, especially in arid regions. The application of exogenous substances can enhance plant salt tolerance and increase its productivity under salinity stress. This work aimed to assess the mechanisms of selenium (Se) at different concentrations (2, 4 and 8 μM SeCl2) to mitigate hazardous impacts of salt toxicity at physiological, biochemical and agronomic levels in bread wheat. The results displayed that Se foliar application increased chlorophyll content, net photosynthetic rate, transpiration rate, stomatal conductance, relative water content, membrane stability index, excised leaf water retention, proline, total soluble sugars, Ca content, K content, antioxidant enzyme activities and non-enzymatic antioxidant compounds compared to untreated plants. On the other hand, Se application decreased the content of Na, hydrogen peroxide and superoxide contents. Accordingly, our findings recommend exogenous Se application (in particular 8 μM) to alleviate the deleterious effects induced by salinity stress and improve wheat yield attributes through enhancing antioxidant defense systems and photosynthetic capacity.

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Section: Discussionsupporting

confidence: 58%

Physiological and Biochemical Mechanisms of Exogenously Applied Selenium for Alleviating Destructive Impacts Induced by Salinity Stress in Bread Wheat

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“…Otherwise, the CWP s and CWP ab demonstrated a highly positive association with antioxidant activity, flavonoids, and phenolic compounds. In addition, the agronomic traits exhibited a highly negative association with H 2 O 2 and

(Desoky et al, 2020 ; Mansour et al, 2020 , 2021 ). According to these results, it is interesting to detect specific physiological and biochemical parameters highly associated with yield-related traits or CWP under water-deficit conditions.…”

Section: Discussionmentioning

confidence: 99%

“…The Mediterranean region is one of the most vulnerable areas to the deleterious impacts of climate change, with fluctuations in precipitation and water shortage being projected to increase, particularly in arid and semi-arid environments (García-Ruiz et al, 2011 ; Cook et al, 2016 ; Mansour et al, 2018 ; Spinoni et al, 2018 ; Chiwetalu et al, 2020 ). As a result, water scarcity causes destructive alterations in the biochemical and physiological processes of plants and, consequently, reduces their growth and productivity (Siddiqui et al, 2015 ; Attia et al, 2021 ; Desoky et al, 2021 ; Mansour et al, 2021 ). Therefore, it is crucial to mitigate the deleterious impacts of water deficiency using practical approaches to boost drought tolerance in field crops (Semida et al, 2020 ; Abd El-Mageed et al, 2021 ; El-Sanatawy et al, 2021 ).…”

Section: Introductionmentioning

confidence: 99%

Physio-Biochemical and Agronomic Responses of Faba Beans to Exogenously Applied Nano-Silicon Under Drought Stress Conditions

et al. 2021

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Nano-silicon application is an efficient novel approach to mitigate the deleterious impacts of drought stress on field crops, which is expected to increase owing to climate change, especially in arid regions. Two-season field studies investigated the influence of foliar-applied nano-silicon (0.5, 1, and 1.5 mM) on physiological and biochemical attributes and their impacts on crop water productivity (CWP) and the agronomic traits of faba beans (Vicia faba). The plants were evaluated under two irrigation regimes: well-watered (100% ETc giving 406 mm ha−1) and drought stress (65% ETc giving 264 mm ha−1). It was found that drought stress significantly decreased gas exchange (leaf net photosynthetic rate, stomatal conductance, and rate of transpiration), water relations (relative water content and membrane stability index), nutrient uptake (N, P, K+, and Ca+2), flavonoids, and phenolic content. In contrast, drought stress significantly increased oxidative stress (H2O2 and O2·-) and enzymatic and non-enzymatic antioxidant activities compared with the well-watered treatment. These influences of drought stress were negatively reflected in seed yield-related traits and CWP. However, foliar treatment with nano-silicon, particularly with 1.5 mM, limited the devastating impact of drought stress and markedly enhanced all the aforementioned parameters. Therefore, exogenously applied nano-silicon could be used to improve the CWP and seed and biological yields of faba bean plants under conditions with low water availability in arid environments.

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“…The lack of genetic diversity limits the progress of improving salt-tolerance in wheat. The genetic diversity could be enriched by introgression of new beneficial alleles from exotic genotypes into adopted commercial cultivars [20,21]. This is a vital approach for enhancing current and future breeding efforts of salt-tolerance.…”

Section: Discussionmentioning

confidence: 99%

Field Screening of Wheat Advanced Lines for Salinity Tolerance

et al. 2021

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Salinity in soil or irrigation water requires developing genetically salt-tolerant genotypes, especially in arid regions. Developing salt-tolerant and high-yielding wheat genotypes has become more urgent in particular with continuing global population growth and abrupt climate changes. The current study aimed at investigating the genetic variability of new breeding lines in three advanced generations F6–F8 under salinity stress. The evaluated advanced lines were derived through accurate pedigree selection under actual saline field conditions (7.74 dS/m) and using saline water in irrigation (8.35 dS/m). Ninety-four F6 lines were evaluated in 2017–2018 and reduced by selection to thirty-seven F7 lines in 2018–2019 and afterward to thirty-four F8 lines in 2019–2020 based on grain yield and related traits compared with adopted check cultivars. Significant genetic variability was detected for all evaluated agronomic traits across generations in the salt-stressed field. The elite F8 breeding lines displayed higher performance than the adopted check cultivars. These lines were classified based on yield index into four groups using hierarchical clustering ranging from highly salt-tolerant to slightly salt-tolerant genotypes, which efficiently enhance the narrow genetic pool of salt-tolerance. The detected response to selection and high to intermediate broad-sense heritability for measured traits displayed their potentiality to be utilized through advanced generations under salinity stress for identifying salt-tolerant breeding lines.

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Identifying drought-tolerant genotypes of faba bean and their agro-physiological responses to different water regimes in an arid Mediterranean environment

Cited by 57 publications

References 79 publications

Physiological and Biochemical Mechanisms of Exogenously Applied Selenium for Alleviating Destructive Impacts Induced by Salinity Stress in Bread Wheat

Physiological and Biochemical Mechanisms of Exogenously Applied Selenium for Alleviating Destructive Impacts Induced by Salinity Stress in Bread Wheat

Physio-Biochemical and Agronomic Responses of Faba Beans to Exogenously Applied Nano-Silicon Under Drought Stress Conditions

Field Screening of Wheat Advanced Lines for Salinity Tolerance

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