scholarly journals Novel Alleles for Combined Drought and Heat Stress Tolerance in Wheat

2020 ◽  
Vol 10 ◽  
Author(s):  
Jessica Schmidt ◽  
Penny J. Tricker ◽  
Paul Eckermann ◽  
Priyanka Kalambettu ◽  
Melissa Garcia ◽  
...  
Keyword(s):  
Heat Stress ◽  
Stress Tolerance ◽  
Heat Stress Tolerance ◽  
Novel Alleles ◽  
Drought And Heat Stress

scholarly journals Transcripts of wheat at a target locus on chromosome 6B associated with increased yield, leaf mass and chlorophyll index under combined drought and heat stress

PLoS ONE ◽  
2020 ◽  
Vol 15 (11) ◽  
pp. e0241966
Author(s):  
Jessica Schmidt ◽  
Melissa Garcia ◽  
Chris Brien ◽  
Priyanka Kalambettu ◽  
Trevor Garnett ◽  
...  
Keyword(s):  
Heat Stress ◽  
Stress Tolerance ◽  
Candidate Genes ◽  
Abiotic Stress Tolerance ◽  
Enrichment Analysis ◽  
Genotyping By Sequencing ◽  
Differentially Expressed ◽  
Pathway Enrichment Analysis ◽  
Heat Stress Tolerance ◽  
Drought And Heat Stress

Drought and heat stress constrain wheat (Triticum aestivum L.) yields globally. To identify putative mechanisms and candidate genes associated with combined drought and heat stress tolerance, we developed bread wheat near-isogenic lines (NILs) targeting a quantitative trait locus (QTL) on chromosome 6B which was previously associated with combined drought and heat stress tolerance in a diverse panel of wheats. Genotyping-by-sequencing was used to identify additional regions that segregated in allelic pairs between the recurrent and the introduced exotic parent, genome-wide. NILs were phenotyped in a gravimetric platform with precision irrigation and exposed to either drought or to combined drought and heat stress from three days after anthesis. An increase in grain weight in NILs carrying the exotic allele at 6B locus was associated with thicker, greener leaves, higher photosynthetic capacity and increased water use index after re-watering. RNA sequencing of developing grains at early and later stages of treatment revealed 75 genes that were differentially expressed between NILs across both treatments and timepoints. Differentially expressed genes coincided with the targeted QTL on chromosome 6B and regions of genetic segregation on chromosomes 1B and 7A. Pathway enrichment analysis showed the involvement of these genes in cell and gene regulation, metabolism of amino acids and transport of carbohydrates. The majority of these genes have not been characterized previously under drought or heat stress and they might serve as candidate genes for improved abiotic stress tolerance.

scholarly journals Drought and heat stress tolerance screening in wheat using computed tomography

Plant Methods ◽  
2020 ◽  
Vol 16 (1) ◽  
Author(s):  
Jessica Schmidt ◽  
Joelle Claussen ◽  
Norbert Wörlein ◽  
Anja Eggert ◽  
Delphine Fleury ◽  
...  
Keyword(s):  
Computed Tomography ◽  
Heat Stress ◽  
Stress Tolerance ◽  
Heat Stress Tolerance ◽  
Drought And Heat Stress

scholarly journals Enhanced drought and heat stress tolerance of tobacco plants with ectopically enhanced cytokinin oxidase/dehydrogenase gene expression

2013 ◽  
Vol 64 (10) ◽  
pp. 2805-2815 ◽  
Author(s):  
Hana Macková ◽  
Marie Hronková ◽  
Jana Dobrá ◽  
Veronika Turečková ◽  
Ondřej Novák ◽  
...  
Keyword(s):  
Gene Expression ◽  
Heat Stress ◽  
Stress Tolerance ◽  
Cytokinin Oxidase ◽  
Tobacco Plants ◽  
Dehydrogenase Gene ◽  
Heat Stress Tolerance ◽  
Drought And Heat Stress

scholarly journals Ethylene involvement in the regulation of heat stress tolerance in plants

2021 ◽  
Author(s):  
Peter Poór ◽  
Kashif Nawaz ◽  
Ravi Gupta ◽  
Farha Ashfaque ◽  
M. Iqbal R. Khan
Keyword(s):  
Heat Stress ◽  
Stress Tolerance ◽  
Heat Stress Tolerance

Evaluation of Triticum durum–Aegilops tauschii derived primary synthetics as potential sources of heat stress tolerance for wheat improvement

2021 ◽  
Vol 19 (1) ◽  
pp. 74-89
Author(s):  
Amandeep Kaur ◽  
Parveen Chhuneja ◽  
Puja Srivastava ◽  
Kuldeep Singh ◽  
Satinder Kaur
Keyword(s):  
Heat Stress ◽  
Stress Tolerance ◽  
Hexaploid Wheat ◽  
Aegilops Tauschii ◽  
Grain Filling ◽  
World Population ◽  
Potential Candidate ◽  
Terminal Heat Stress ◽  
Heat Stress Tolerance ◽  
The Impact

AbstractAddressing the impact of heat stress during flowering and grain filling is critical to sustaining wheat productivity to meet a steadily increasing demand from a rapidly growing world population. Crop wild progenitor species of wheat possess a wealth of genetic diversity for several biotic and abiotic stresses, and morphological traits and can serve as valuable donors. The transfer of useful variation from the diploid progenitor, Aegilops tauschii, to hexaploid wheat can be done through the generation of synthetic hexaploid wheat (SHW). The present study targeted the identification of potential primary SHWs to introduce new genetic variability for heat stress tolerance. Selected SHWs were screened for different yield-associated traits along with three advanced breeding lines and durum parents as checks for assessing terminal heat stress tolerance under timely and late sown conditions for two consecutive seasons. Heat tolerance index based on the number of productive tillers and thousand grain weight indicated that three synthetics, syn9809 (64.32, 78.80), syn14128 (50.30, 78.28) and syn14135 (58.16, 76.03), were able to endure terminal heat stress better than other SHWs as well as checks. One of these synthetics, syn14128, recorded a minimum reduction in thousand kernel weight (21%), chlorophyll content (2.56%), grain width (1.07%) despite minimum grain-filling duration (36.15 d) and has been selected as a potential candidate for introducing the terminal heat stress tolerance in wheat breeding programmes. Breeding efforts using these candidate donors will help develop lines with a higher potential to express the desired heat stress-tolerant phenotype under field conditions.

scholarly journals Genotype and Trait Specific Responses to Rapamycin Intake in Drosophila melanogaster

Insects ◽  
2021 ◽  
Vol 12 (5) ◽  
pp. 474
Author(s):  
Palle Duun Rohde ◽  
Asbjørn Bøcker ◽  
Caroline Amalie Bastholm Jensen ◽  
Anne Louise Bergstrøm ◽  
Morten Ib Juul Madsen ◽  
...  
Keyword(s):  
Drosophila Melanogaster ◽  
Heat Stress ◽  
Side Effects ◽  
Protein Kinase ◽  
Stress Tolerance ◽  
Treated Group ◽  
Model System ◽  
Treatment Efficiency ◽  
Evolutionarily Conserved ◽  
Heat Stress Tolerance

Rapamycin is a powerful inhibitor of the TOR (Target of Rapamycin) pathway, which is an evolutionarily conserved protein kinase, that plays a central role in plants and animals. Rapamycin is used globally as an immunosuppressant and as an anti-aging medicine. Despite widespread use, treatment efficiency varies considerably across patients, and little is known about potential side effects. Here we seek to investigate the effects of rapamycin by using Drosophila melanogaster as model system. Six isogenic D. melanogaster lines were assessed for their fecundity, male longevity and male heat stress tolerance with or without rapamycin treatment. The results showed increased longevity and heat stress tolerance for male flies treated with rapamycin. Conversely, the fecundity of rapamycin-exposed individuals was lower than for flies from the non-treated group, suggesting unwanted side effects of the drug in D. melanogaster. We found strong evidence for genotype-by-treatment interactions suggesting that a ‘one size fits all’ approach when it comes to treatment with rapamycin is not recommendable. The beneficial responses to rapamycin exposure for stress tolerance and longevity are in agreement with previous findings, however, the unexpected effects on reproduction are worrying and need further investigation and question common believes that rapamycin constitutes a harmless drug.

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