Abstract
T meet the food security demands of growing human population, yield of majority of the crop plants needs to be doubled by 2050 while dealing with the climate change. With the increasing temperature trends and unusual climatic changes, crops in future climates will experience frequent temperature extremes causing significant yield losses. Heat stress is a serious challenge to wheat production as every 1 °C increase above the optimal temperature results in 4-5% yield loss. Rainfed areas of the US are projected to decrease wheat production by 20-40% due to climate change. Thus, developing climate resilient wheat is crucial in today’s context. As a public-private partnership, Feed the Future Innovation lab-Climate Resilient Wheat is developing heat tolerant varieties by exploiting natural variation. A short period of heat stress during germination had serious and long-term effect on plant development and yield. A ten-day heat stress at germination reduced germination percentage, coleoptile length and yield. Sugars availability maybe a reason for the effect on germination as external application of sucrose showed significant recovery in germination percentage and coleoptile length. Heat stress during vegetative phase significantly affected tiller number, flowering time, pollen fertility, plant height and yield. During the reproductive stage, heat stress adversely affected photosynthesis and increased membrane disintegration due to decreased chlorophyll index and increased ROS and lipid peroxidase activity. The identified heat tolerant lines will be used to transfer the trait into wheat cultivars by simultaneous detection and utilization of QTLs. Various molecular and physiological studies for the trait are underway and update will be presented.
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Claims 9
Claim · model-written summary
A ten-day heat stress at germination reduced germination percentage, coleoptile length and yield of wheat.
- Taxon
- wheat
Triticum aestivumt0 - Treatment
- A ten-day heat stress at germinatione1
- Outcome
- germination percentage, coleoptile length and yielde1
- Direction
- reducede1
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“climate resilient wheat”
e1“A ten-day heat stress at germination reduced germination percentage, coleoptile length and yield”
Claim · model-written summary
External sucrose application significantly recovered germination percentage and coleoptile length of wheat.
- Taxon
- wheatTriticum aestivumt0
- Treatment
- external application of sucrosee2
- Outcome
- germination percentage and coleoptile lengthe2
- Direction
- recoverye2
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“climate resilient wheat”
e2“external application of sucrose showed significant recovery in germination percentage and coleoptile length”
Claim · model-written summary
Sugar availability may be a reason for the heat-stress effect on wheat germination.
- Taxon
- wheatTriticum aestivumt0
- Compound
- Sugarse2
- Outcome
- effect on germinatione2
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“climate resilient wheat”
e2“Sugars availability maybe a reason for the effect on germination”
Claim · model-written summary
Heat stress during the vegetative phase significantly affected tiller number, flowering time and pollen fertility of wheat.
- Taxon
- wheatTriticum aestivumt0
- Organ / stage
- vegetative phasee3
- Treatment
- Heat stress during vegetative phasee3
- Outcome
- tiller number, flowering time, pollen fertilitye3
Not reportedComparatorDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“climate resilient wheat”
e3“Heat stress during vegetative phase significantly affected tiller number, flowering time, pollen fertility, plant height and yield”
Claim · model-written summary
Heat stress during the vegetative phase significantly affected plant height and yield of wheat.
- Taxon
- wheatTriticum aestivumt0
- Organ / stage
- vegetative phasee3
- Treatment
- Heat stress during vegetative phasee3
- Outcome
- plant height and yielde3
Not reportedComparatorDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“climate resilient wheat”
e3“Heat stress during vegetative phase significantly affected tiller number, flowering time, pollen fertility, plant height and yield”
Claim · model-written summary
Heat stress during the reproductive stage adversely affected wheat photosynthesis.
- Taxon
- wheatTriticum aestivumt0
- Organ / stage
- reproductive stagee4
- Treatment
- heat stresse4
- Outcome
- photosynthesise4
- Direction
- adversely affectede4
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“climate resilient wheat”
e4“During the reproductive stage, heat stress adversely affected photosynthesis and increased membrane disintegration due to decreased chlorophyll index and increased ROS and lipid peroxidase activity”
Claim · model-written summary
Heat stress during the reproductive stage increased membrane disintegration in wheat.
- Taxon
- wheatTriticum aestivumt0
- Organ / stage
- reproductive stagee4
- Treatment
- heat stresse4
- Outcome
- membrane disintegratione4
- Direction
- increasede4
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“climate resilient wheat”
e4“During the reproductive stage, heat stress adversely affected photosynthesis and increased membrane disintegration due to decreased chlorophyll index and increased ROS and lipid peroxidase activity”
Claim · model-written summary
Heat stress during the reproductive stage decreased chlorophyll index in wheat.
- Taxon
- wheatTriticum aestivumt0
- Organ / stage
- reproductive stagee4
- Treatment
- heat stresse4
- Outcome
- chlorophyll indexe4
- Direction
- decreasede4
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“climate resilient wheat”
e4“During the reproductive stage, heat stress adversely affected photosynthesis and increased membrane disintegration due to decreased chlorophyll index and increased ROS and lipid peroxidase activity”
Claim · model-written summary
Heat stress during the reproductive stage increased ROS and lipid peroxidase activity in wheat.
- Taxon
- wheatTriticum aestivumt0
- Organ / stage
- reproductive stagee4
- Treatment
- heat stresse4
- Outcome
- ROS and lipid peroxidase activitye4
- Direction
- increasede4
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“climate resilient wheat”
e4“During the reproductive stage, heat stress adversely affected photosynthesis and increased membrane disintegration due to decreased chlorophyll index and increased ROS and lipid peroxidase activity”
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