Abstract
A combination of drought and heat stress, occurring at the vegetative or reproductive growth phase of many different crops can have a devastating impact on yield. In soybean (Glycine max), a considerable effort has been made to develop genotypes with enhanced yield production under conditions of drought or heat stress. However, how these genotypes perform in terms of growth, physiological responses, and most importantly seed production, under conditions of drought and heat combination is mostly unknown. Here, we studied the impact of water deficit and heat stress combination on the physiology, seed production, and yield per plant of two soybean genotypes, Magellan and Plant Introduction (PI) 548313, that differ in their reproductive responses to heat stress. Our findings reveal that although PI 548313 produced more seeds than Magellan under conditions of heat stress, under conditions of water deficit, and heat stress combination its seed production decreased. Because the number of flowers and pollen germination of PI 548313 remained high under heat or water deficit and heat combination, the reduced seed production exhibited by PI 548313 under the stress combination could be a result of processes that occur at the stigma, ovaries and/or other parts of the flower following pollen germination.
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Claims 5
Claim · model-written summary
PI 548313 produced more seeds than Magellan under heat stress.
- Taxon
- soybean
Glycine maxt0 - Material
- PI 548313e0
- Treatment
- heat stresse0
- Outcome
- seedse0
- Direction
- moree0
- Comparator
- Magellane0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“PI 548313 produced more seeds than Magellan under conditions of heat stress”
t0“soybean”
Claim · model-written summary
Combined water deficit and heat decreased seed production of PI 548313.
- Taxon
- soybeanGlycine maxt0
- Material
- PI 548313t1
- Treatment
- water deficit, and heat stress combinatione0
- Outcome
- seed productione0
- Direction
- decreasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“under conditions of water deficit, and heat stress combination its seed production decreased”
t0“soybean”
t1“PI 548313 produced more seeds”
Claim · model-written summary
Flower number in PI 548313 remained high under heat or combined stress.
- Taxon
- soybeanGlycine maxt0
- Material
- PI 548313e0
- Treatment
- heat or water deficit and heat combinatione0
- Outcome
- number of flowerse0
- Direction
- remained highe0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the number of flowers and pollen germination of PI 548313 remained high under heat or water deficit and heat combination”
t0“soybean”
Claim · model-written summary
Pollen germination in PI 548313 remained high under heat or combined stress.
- Taxon
- soybeanGlycine maxt0
- Material
- PI 548313e0
- Treatment
- heat or water deficit and heat combinatione0
- Outcome
- pollen germinatione0
- Direction
- remained highe0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the number of flowers and pollen germination of PI 548313 remained high under heat or water deficit and heat combination”
t0“soybean”
Claim · model-written summary
The authors proposed that post-germination processes in the flower could explain reduced seed production.
- Taxon
- soybeanGlycine maxt0
- Material
- PI 548313e0
- Outcome
- reduced seed productione0
- Qualifier
- processes that occur at the stigma, ovaries and/or other parts of the flower following pollen germinatione0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the reduced seed production exhibited by PI 548313 under the stress combination could be a result of processes that occur at the stigma, ovaries and/or other parts of the flower following pollen germination”
t0“soybean”
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