Genetic Interventions to Improve Salt and Microelement Toxicity Tolerance in Wheat

Kulshreshtha, Neeraj; Kumar, Arvind; Lata, Charu

doi:10.1007/978-981-16-4449-8_18

Cited by 2 publications

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References 95 publications

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“…Most of the previous studies used NaCl to induce salt stress in wheat and other crops. Unfortunately, only a few studies used natural seawater to test the tolerance to salinity of wheat genotypes (Kingsbury and Epstein, 1984;Nassar et al, 2020;Hadia et al, 2022;Kulshreshtha et al, 2022). Two studies assessed the seawater tolerance of wheat genotypes at the germination and seedling stages (Kingsbury and Epstein, 1984;Hadia et al, 2022).…”

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confidence: 99%

Growth responses and genetic variation among highly ecologically diverse spring wheat genotypes grown under seawater stress

et al. 2022

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Most of the freshwaters worldwide are used for agriculture. Freshwater sources are expected to decline and will not suffice to support the food production needed for the growing population. Therefore, growing crops with seawater might constitute a solution. However, very little work has been done on the effect of seawater stress on wheat, an important cereal crop. The present study aimed to determine whether particular wheat genotypes provided better resistance to seawater stress. A set of 80 highly diverse spring wheat genotypes collected from different countries in Europe, Asia, Africa, North and South America was exposed to 50% seawater stress at the early growth stage. Four seeding shoot and root traits were scored for all genotypes. High genetic variations were found among all genotypes for the epicotyl length (EL), hypocotyl length (HL), number of radicles (NOR), and fresh weight (FW). Eight genotypes with high-performance scores of seedling traits were selected. The correlation analyses revealed highly significant correlations among all traits scored in this study. The strongest correlation was found between the NOR and the other seeding traits. Thus, the NOR might be an important adaptive trait for seawater tolerance. The genetic diversity among all genotypes was investigated based on genetic distance. A wide range of genetic distances among all genotypes was found. There was also a great genetic distance among the eight selected genotypes. In particular, the genetic distance between ATRI 5310 (France) and the other seven genotypes was the greatest. Such high genetic diversity might be utilized to select highly divergent genotypes for crossing in a future breeding program. The present study provides very useful information on the presence of different genetic resources in wheat for seawater tolerance.

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Section: Figurementioning

confidence: 99%

Growth responses and genetic variation among highly ecologically diverse spring wheat genotypes grown under seawater stress

et al. 2022

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Comprehensive Evaluation of Morpho-Physiological and Ionic Traits in Wheat (Triticum aestivum L.) Genotypes under Salinity Stress

2022

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Salinity is the foremost abiotic stress that severely affects plant growth and constrains its productivity worldwide. In the present investigation, genetic variation in wheat genotypes was evaluated to identify novel salt-tolerant genetic resources, which could be used in the bread wheat improvement program. A diverse panel of 44 different wheat genotypes was evaluated at seedling stage to characterize morphological and ionic traits under salt stress (150 mM NaCl). Salt treatment caused 33.33, 45.31, 55.17, and 72.53% reduction in root dry weight (RDW), root fresh weight (RFW), shoot dry weight (SDW), and shoot fresh weight (SFW), respectively. Under salt stress, maximum inhibition of Na+ ion uptake was observed in tolerant genotypes, and this was accompanied by a high Ca2+ uptake. Wheat genotypes showed a wide spectrum of responses under salt stress; however, four genotypes, EC576356, IC533596, IC279230, and IC290188, exhibited consistent performance, which was strongly linked to proper Na+ and K+ discrimination in leaves. The tolerant genotypes acquired a better ability to maintain stable relative water content (RWC), chlorophyll (CHL), and photosynthesis rate (PS), resulting in significantly higher dry matter production under salt stress. Further, biomass, shoot K+, root Ca2+, and shoot K+/Na+ were identified as the most effective parameters for screening wheat germplasm for salinity tolerance. The identified germplasm could be used as donors for transferring salt tolerance to improved cultivars as well as in further genetic studies to uncover the genetic mechanisms governing salt stress response in wheat.

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Genetic Interventions to Improve Salt and Microelement Toxicity Tolerance in Wheat

Cited by 2 publications

References 95 publications

Growth responses and genetic variation among highly ecologically diverse spring wheat genotypes grown under seawater stress

Growth responses and genetic variation among highly ecologically diverse spring wheat genotypes grown under seawater stress

Comprehensive Evaluation of Morpho-Physiological and Ionic Traits in Wheat (Triticum aestivum L.) Genotypes under Salinity Stress

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