Identification and Characterization of Contrasting Genotypes/Cultivars for Developing Heat Tolerance in Agricultural Crops: Current Status and Prospects

Chaudhary, Seema; Devi, Poonam; Bhardwaj, Anjali; Jha, Uday Chand; Sharma, Kamal Dev; Prasad, P. V. Vara; Siddique, Kadambot H. M.; HanumanthaRao, Bindumadhava; Kumar, Shiv; Nayyar, Harsh

doi:10.3389/fpls.2020.587264

Cited by 73 publications

(59 citation statements)

References 396 publications

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“…Heat stress caused MDA contents to decrease significantly in D-09013 and CH104/06, so these genotypes could have better adaptation capacity under heat stress. These results were in accordance with a previous report, in which heat tolerant chickpea genotypes had a lower accumulation of MDA as compared to sensitive genotypes (Chaudhary et al, 2020 ).…”

Section: Discussionsupporting

confidence: 93%

“…In general, heat stress reduced plant growth, specially shoot or root length and shoot or root dry weight in chickpea, heat tolerant genotypes retained these attributes (Thorsted et al, 2006 ; Kiran and Chimmad, 2018 ). Similar results were reported in chickpea tolerant genotypes Raj-4037 and PBW590 under heat stress condition (Chaudhary et al, 2020 ). In other reports, it was observed that in maize, sorghum, and soybean under low soil moisture content diminishes, plant height, plant leaf and growth, dry matter, and eventually yield in susceptible genotypes (Ghosh et al, 2000 ; Khan et al, 2015 ).…”

Section: Discussionsupporting

confidence: 88%

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Investigation of Distinctive Morpho-Physio and Biochemical Alterations in Desi Chickpea at Seedling Stage Under Irrigation, Heat, and Combined Stress

2021

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Global climatic instabilities have become the main reason for drastic yield losses in chickpea. This shift in climate could be a great threat in the future for food security in developing countries. Chickpea production is badly hampered by heat stress coupled with drought stress, and these factors can reduce yields by 40–45%. To mitigate yield losses due these abiotic factors, irrigation supplementation could be the best strategy. The present study aimed to (i) investigate the tolerance response of 9 desi chickpea genotypes against heat stress (H), irrigation (I), and a combination of both (I+H) through morphophysiological and biochemical indices at early growth stage, and (ii) assess yield performance across multiple locations of the country. Results revealed that under irrigation treatment, all genotypes perform well, but the genotypes D-09027 and D-09013 showed best performance because, as compared to control, they retained root length, seedling fresh weight, root fresh weight, root dry weight, esterase activity, Malondialdehyde (MDA) content, total chlorophyll, and total carotenoids. Shoot length and total phenolic contents (TPC) increased in both genotypes. Superoxide dismutase (SOD) and peroxidase (POD) increased in D-09027 and retained in D-09013. Catalase activity increased in D-09013 and retained in D-09027. Protease activity, total water potential and osmotic potential decreased in both genotypes and depicted high yield potential with 27 and 30% increase in yield over Bhakhar-2011 (check), respectively. In case of heat stress, maximum tolerance was found in genotypes CH104/06 and D-09013 with no change in shoot and root length, seedling dry weight, shoot fresh and dry weight, root dry weight, relative water content, turgor water potential, catalase (CAT) activity, esterase activity, increased root fresh weight, peroxidase activity (POD), ascorbate peroxidase activity (APX), and lycopene with low accumulation of protease and Malondialdehyde content (MDA). Both genotypes depicted high yield potential with 30 and 43% increase in yield over check across multiple locations of the country. Under the combined treatment, most genotypes showed good performance, while CH104/06 was selected as best performer genotype because significant of its increased root fresh weight, lycopene content, chlorophyll b, total carotenoids, total chlorophyll, retained shoot length, root length, seedling fresh and dry weight, total water potential, osmotic potential, relative water content, peroxidase activity (POD), catalase, esterase, and its ascorbate peroxidase (APX) activity and total soluble proteins (TSP) showed highest yield potential with 43% increase over check. Identified best performing and tolerant genotypes can further be employed for breeding climate-smart chickpea genotypes for sustainable production under changing climate.

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Section: Discussionsupporting

confidence: 93%

Section: Discussionsupporting

confidence: 88%

Investigation of Distinctive Morpho-Physio and Biochemical Alterations in Desi Chickpea at Seedling Stage Under Irrigation, Heat, and Combined Stress

2021

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“…It seems that heat‐tolerant wild genotypes that evolved in warmer regions have been able to develop heat‐adaptive strategies. Chaudhary et al (2020) noted that grain‐filling duration is a vulnerable stage to high temperature, which is directly associated with grain number and yield. In the present study, a positive association was observed between the length of the reproductive period, number and weight of grain, and grain yield in barley genotypes.…”

Section: Discussionmentioning

confidence: 99%

Tolerance to high temperature at reproductive stage: Trade‐offs between phenology, grain yield and yield‐related traits in wild and cultivated barleys

2021

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High‐temperature stress at the reproductive stage poses a substantial constraint on cereal production worldwide. This study was conducted to assess tolerance to terminal high‐temperature stress in 45 wild (Hordeum vulgare ssp. spontaneum) genotypes, four cultivars (H. vulgare ssp. vulgare), 98 F3 and 79 BC1F2 families derived from hybridization of a high‐temperature tolerant wild genotype and a susceptible cultivar ‘Mona’. Results of analysis of variance showed significant genotypic and high‐temperature stress effects on all the traits studied. Approximately one quarter of the wild genotypes originating from a warmer climate were slightly affected by high‐temperature stress. Grain yield strongly correlated (p < .01) with stress tolerance, yield stability and heat tolerance indices. The reduction in the reproduction period caused by high temperature was much higher in cultivated genotypes than in wild ones. Grain number and weight were the most effective yield components to screen high‐temperature tolerant F3 and BC1F2 families. In conclusion, strategies like escape/avoidance are being used primarily to cope with heat stress by cultivars, whereas adaptive strategies such as tolerance are being implemented by wild barley.

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“…Thus as the grain (number and weight per spike) influences significantly from grain-filling duration and contributes significantly to final yield, reducing its number to enable heat tolerance or escape is likely to result in a substantial trade-off with yield. Chaudhary et al (2020) noted that grain-filling duration is a vulnerable stage to high-temperature which directly associated with grain number and yield. These findings are consistent with those reported by Bergkamp et al (2018) on wheat, indicating that terminal heat stress can shorten the grain-filling period via accelerated grain-filling rate, thereby causing a limited amount of carbohydrates transferred from the source tissues to the grains and reducing grain yield.…”

Section: Discussionmentioning

confidence: 99%

A novel tolerance index to identify heat tolerance in cultivated and wild barley genotypes

Bahrami

Arzani

Rahimmalek

2020

Preprint

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Thermal stress at the reproductive stage poses a substantial constraint on cereal production worldwide. A two-year field study was conducted to assess tolerance to terminal heat stress in cultivated (Hordeum vulgare ssp. vulgare L.) and wild (H. vulgare ssp. spontaneum L.) barley genotypes using phenological and agronomic traits as well as selection indices based on grain yield. A new heat-tolerance index was tested while a simultaneous study was also carried out of both phenological and grain yield-related variables as well as previously defined indices. Results of analysis of variance showed the significant genotypic and high-temperature stress (environment) effects on all the traits studied. In contrast to the cultivated genotypes, the wild ones were found less affected by high-temperature stress. Moreover, both cultivated and wild genotypes were observed to use the life cycle shortening as a mechanism to evade heat stress. In addition, supplementary tolerance mechanisms were also found likely to contribute to heatstress evasion in the wild germplasm. Grain yield showed a strong relationship with both stress tolerance index (STI) and heat tolerance index (HTI) among the wild genotypes. However, multivariate analysis highlighted the feasibility of HTI to screen high-temperature tolerant wild genotypes under harsh environments with the most high-temperature tolerant wild genotypes identified originating from warm climates.

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Identification and Characterization of Contrasting Genotypes/Cultivars for Developing Heat Tolerance in Agricultural Crops: Current Status and Prospects

Cited by 73 publications

References 396 publications

Investigation of Distinctive Morpho-Physio and Biochemical Alterations in Desi Chickpea at Seedling Stage Under Irrigation, Heat, and Combined Stress

Investigation of Distinctive Morpho-Physio and Biochemical Alterations in Desi Chickpea at Seedling Stage Under Irrigation, Heat, and Combined Stress

Tolerance to high temperature at reproductive stage: Trade‐offs between phenology, grain yield and yield‐related traits in wild and cultivated barleys

A novel tolerance index to identify heat tolerance in cultivated and wild barley genotypes

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