Molecular approaches for designing heat tolerant wheat

Kumar, Sundeep; Kumari, Prerna; Kumar, Uttam; Grover, Monendra; Singh, Amit Kumar; Singh, Rakesh; Sengar, R. S.

doi:10.1007/s13562-013-0229-3

Cited by 50 publications

(32 citation statements)

References 92 publications

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“…The results observed in present study are strongly supported by earlier investigation by Kumar et al, (2013) who observed decrease in the cell membrane stability (CMS) at different stages of growth. Thermo tolerant cultivar showed the highest cell membrane stability index.…”

Section: Relation Between Cell Membrane Stability and Total Antioxidasupporting

confidence: 92%

“…Mohammed and Tarpley (2009) showed that susceptible genotypes have low antioxidant activity as compare to tolerant at different growth stages. Thermo tolerance capacity was analyzed using total antioxidant capacity parameter and was found high in thermo tolerant genotypes as compared to thermo susceptible genotypes Kumar et al, (2013). Similar results were found by Almeselmani et al, (2006); (Asthir 2015).…”

Section: Relation Between Cell Membrane Stability and Total Antioxidasupporting

confidence: 77%

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Evaluation of Wheat Genotypes for Protective Mechanisms of Terminal Heat Stress

ja¹,

Munjal²,

Ram³

2017

Int.J.Curr.Microbiol.App.Sci

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Section: Relation Between Cell Membrane Stability and Total Antioxidasupporting

confidence: 92%

Section: Relation Between Cell Membrane Stability and Total Antioxidasupporting

confidence: 77%

Evaluation of Wheat Genotypes for Protective Mechanisms of Terminal Heat Stress

ja¹,

Munjal²,

Ram³

2017

Int.J.Curr.Microbiol.App.Sci

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“…production (Kumar et al, 2013). Although, in the Mediterranean area these two stresses usually occur simultaneously, this study reports the separate effects of dehydration and heat exposure on XTH expression as well as XET in vitro activity and in vivo action in apical and sub-apical root regions and shoots excised from 3-day-old seedlings of durum wheat ( T. durum Desf.)…”

Section: Introductionmentioning

confidence: 99%

Drought and Heat Differentially Affect XTH Expression and XET Activity and Action in 3-Day-Old Seedlings of Durum Wheat Cultivars with Different Stress Susceptibility

et al. 2016

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Heat and drought stress have emerged as major constraints for durum wheat production. In the Mediterranean area, their negative effect on crop productivity is expected to be exacerbated by the occurring climate change. Xyloglucan endotransglucosylase/hydrolases (XTHs) are chief enzymes in cell wall remodeling, whose relevance in cell expansion and morphogenesis suggests a central role in stress responses. In this work the potential role of XTHs in abiotic stress tolerance was investigated in durum wheat. The separate effects of dehydration and heat exposure on XTH expression and its endotransglucosylase (XET) in vitro activity and in vivo action have been monitored, up to 24 h, in the apical and sub-apical root regions and shoots excised from 3-day-old seedlings of durum wheat cultivars differing in stress susceptibility/tolerance. Dehydration and heat stress differentially influence the XTH expression profiles and the activity and action of XET in the wheat seedlings, depending on the degree of susceptibility/tolerance of the cultivars, the organ, the topological region of the root and, within the root, on the gradient of cell differentiation. The root apical region was the zone mainly affected by both treatments in all assayed cultivars, while no change in XET activity was observed at shoot level, irrespective of susceptibility/tolerance, confirming the pivotal role of the root in stress perception, signaling, and response. Conflicting effects were observed depending on stress type: dehydration evoked an overall increase, at least in the apical region of the root, of XET activity and action, while a significant inhibition was caused by heat treatment in most cultivars. The data suggest that differential changes in XET action in defined portions of the root of young durum wheat seedlings may have a role as a response to drought and heat stress, thus contributing to seedling survival and crop establishment. A thorough understanding of the mechanisms underlying these variations could represent the theoretical basis for implementing breeding strategies to develop new highly productive hybrids adapted to future climate scenarios.

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“…South Asia, comprising of India, Nepal, Pakistan and Bangladesh is one of the major wheat producing and consuming area in the world. This region suffers signifi cant losses each year due to high temperature stress (Kumar et al 2013 ). A recent study by World Bank predicts that a 2 °C rise in world average temperature may lead to extreme heat conditions in South Asia.…”

Section: Temperature Stress and Wheat Productionmentioning

confidence: 99%

Early Maturity in Wheat for Adaptation to High Temperature Stress

Mondal

Joshi

Huerta‐Espino

et al. 2015

Advances in Wheat Genetics: From Genome to Field

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High temperatures pose a serious threat to productivity maintenance and enhancement in wheat. A strategy that has come forward in the CIMMYT breeding program is the development of high yielding early maturing lines that are adapted to high temperature stress especially for South Asia. The high temperature stress in South Asia is classifi ed into terminal high temperature stress where the high temperatures stress occurs during grain fi lling stages, and continual high temperature stress, where high temperature persists across the wheat growing season. The new high yielding, early maturing and heat tolerant CIMMYT wheat lines were evaluated for grain yield and adaptation across diverse locations in South Asia and Mexico. Trials were conducted for three consecutive years 2009-2010, 2010-2011, and 2011-2012. The results suggest that CIMMYT lines with high yields and early maturity, selected under normal and late sown condition in Cd. Obregon, Mexico, have the potential to adapt and outperform normal maturing check varieties under terminal and continual high temperature stress in South Asia. Earliness favored the plants to escape terminal high temperature stress and also promoted an effi cient utilization of available resources under continual high temperature stress to achieve higher grain yield. The simultaneous enhancement of grain yield potential and heat stress tolerance of early maturing wheat lines is likely to be benefi cial in enhancing productivity under high temperature stress across South Asia.

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Molecular approaches for designing heat tolerant wheat

Cited by 50 publications

References 92 publications

Evaluation of Wheat Genotypes for Protective Mechanisms of Terminal Heat Stress

Evaluation of Wheat Genotypes for Protective Mechanisms of Terminal Heat Stress

Drought and Heat Differentially Affect XTH Expression and XET Activity and Action in 3-Day-Old Seedlings of Durum Wheat Cultivars with Different Stress Susceptibility

Early Maturity in Wheat for Adaptation to High Temperature Stress

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