Physio-biochemical characterization of wheat genotypes under temperature stress

Pandey, Ankita; Masthigowda, Mamrutha Harohalli; Kumar, Rakesh; Pandey, Girish Chandra; Awaji, Sushma M; Singh, Gyanendra

doi:10.1007/s12298-022-01267-4

Cited by 11 publications

(2 citation statements)

References 56 publications

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“…The complex interplay morphological and physio-biochemical factors in determining the wheat yield under terminal heat stress makes it a thrust area for research. While earlier research focused on morphological parameters such as wheat height, tillers, grain yield, biological yield, harvest index, grain volume, and seed density for developing heat tolerant wheat cultivars, however genetic gain has reached on plateau because these alone are insufficient for developing effective cultivars in present scenario without full exploitation of other traits like biochemical, multispectral indices and gaseous exchange parameters [ 10 ]. Therefore, involvement of physio-biochemical parameters with high heritability and genetic advance can be valuable for assessing susceptibility/tolerance of genotypes and effective selection as they are directly involved in heat stress mechanism [ 10 ].…”

Section: Introductionmentioning

confidence: 99%

Unlocking genetic insights: Evaluating wheat RILs for physiobiochemical traits under terminal heat stress conditions

Redhu,

Singh,

Kumari

et al. 2024

BMC Plant Biol

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Background The increasing impacts of heat stress on wheat production due to climate change has entailed the development of heat-resilient crop varieties. To address this, two hundred recombinant inbred lines (RILs) derived from a cross between WH711/WH1021 were evaluated in a randomized block design (RBD) with two replications at CCSHAU, Hisar, during 2018-19 under heat stress and non-stress conditions. Heat stress was induced by altering the date of sowing so that the grain filling stage coincide with heat stress. Results Heat stress adversely affects RILs performance, as illustrated by alterations in phenotypic traits. Highest coefficients of variations were recorded for TAA, CTD 1, WUE, CTD 2, Cc and A under non-stress and heat stress conditions whereas gs, WUEi and GY under non-stress and SPAD 1, SPAD 2, GY and NDVI 2 under heat-stress conditions recorded moderate estimates of coefficient of variations. CTD 2, TAA, E, WUE and A displayed a significant occurrence of both high heritability and substantial genetic advance under non-stress. Similarly, CTD 2, NDVI 2, A, WUEi, SPAD 2, gs, E, Ci, MDA and WUE exhibited high heritability with high genetic advance under heat-stress conditions. Conclusions Complementary and duplicate types of interactions with number of controlling genes were observed for different parameters depending on the traits and environments. RILs 41, 42, 59, 74, 75, 180 and 194 were categorized as heat tolerant RILs. Selection preferably for NDVI 1, RWC, TAA, A, E and WUEi to accumulate heat tolerance favorable alleles in the selected RILs is suggested for development of heat resilient genotypes for sustainable crop improvement. The results showed that traits such as such as NDVI, RWC, TAA, A, E, and WUEi, can be effective for developing heat-resilient wheat genotypes and ensuring sustainable crop improvement.

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Section: Introductionmentioning

confidence: 99%

Unlocking genetic insights: Evaluating wheat RILs for physiobiochemical traits under terminal heat stress conditions

Redhu,

Singh,

Kumari

et al. 2024

BMC Plant Biol

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“…Drought stress decreases crop chlorophyll content, destroys photosynthetic machinery, inhibits growth, and ultimately reduces yield [ 5 , 6 ]. In addition, flag leaf chlorophyll content can reflect the growth status of plants [ 7 , 8 ]. Chlorophyll is involved in capturing light energy and converting it into chemical energy during photosynthesis.…”

Section: Introductionmentioning

confidence: 99%

Rapid and Nondestructive Evaluation of Wheat Chlorophyll under Drought Stress Using Hyperspectral Imaging

Yang

Nan

et al. 2023

IJMS

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Chlorophyll drives plant photosynthesis. Under stress conditions, leaf chlorophyll content changes dramatically, which could provide insight into plant photosynthesis and drought resistance. Compared to traditional methods of evaluating chlorophyll content, hyperspectral imaging is more efficient and accurate and benefits from being a nondestructive technique. However, the relationships between chlorophyll content and hyperspectral characteristics of wheat leaves with wide genetic diversity and different treatments have rarely been reported. In this study, using 335 wheat varieties, we analyzed the hyperspectral characteristics of flag leaves and the relationships thereof with SPAD values at the grain-filling stage under control and drought stress. The hyperspectral information of wheat flag leaves significantly differed between control and drought stress conditions in the 550–700 nm region. Hyperspectral reflectance at 549 nm (r = −0.64) and the first derivative at 735 nm (r = 0.68) exhibited the strongest correlations with SPAD values. Hyperspectral reflectance at 536, 596, and 674 nm, and the first derivatives bands at 756 and 778 nm, were useful for estimating SPAD values. The combination of spectrum and image characteristics (L*, a*, and b*) can improve the estimation accuracy of SPAD values (optimal performance of RFR, relative error, 7.35%; root mean square error, 4.439; R2, 0.61). The models established in this study are efficient for evaluating chlorophyll content and provide insight into photosynthesis and drought resistance. This study can provide a reference for high-throughput phenotypic analysis and genetic breeding of wheat and other crops.

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