Abstract
We examined the influence of drought stress during grain filling on grain yield to investigate changes in assimilates in sink and source organs. When plants were subjected to drought stress from the start of grain filling until harvest, the photosynthetic rate rapidly decreased. Grain dry mass during maturation was not significantly different between the control and drought-stressed plants. Under drought stress conditions, starch content in source organs (peduncle, leaf, petiole, stem, and root) was significantly lower than in corresponding organs of control plants; the greatest difference was seen in leaves. Consistent with this observation, α- and β-amylase activities in leaves significantly increased within the first 6 d of drought stress. We conclude that in cowpea subjected to drought stress during grain filling, the grain yield is maintained, despite a dramatic decrease in photosynthetic rate, by translocation of photoassimilates from source organs.
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Claims 5
Claim · model-written summary
Drought from the start of grain filling until harvest rapidly decreased photosynthetic rate.
- Taxon
- cowpea
Vigna unguiculatat0 - Treatment
- drought stresse0
- Outcome
- photosynthetic ratee0
- Direction
- decreasede0
- Qualifier
- from the start of grain filling until harveste0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“When plants were subjected to drought stress from the start of grain filling until harvest, the photosynthetic rate rapidly decreased”
t0“cowpea”
Claim · model-written summary
Grain dry mass during maturation did not differ significantly between drought and control plants.
- Taxon
- cowpeaVigna unguiculatat0
- Organ / stage
- during maturatione0
- Treatment
- drought-stressede0
- Outcome
- Grain dry masse0
- Direction
- not significantly differente0
- Comparator
- controle0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Grain dry mass during maturation was not significantly different between the control and drought-stressed plants”
t0“cowpea”
Claim · model-written summary
Drought significantly lowered starch content across source organs compared with corresponding control organs, with the largest difference in leaves.
- Taxon
- cowpeaVigna unguiculatat0
- Organ / stage
- source organse0
- Treatment
- drought stresse0
- Outcome
- starch contente0
- Direction
- lowere0
- Qualifier
- the greatest difference was seen in leavese0
- Comparator
- control plantse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Under drought stress conditions, starch content in source organs (peduncle, leaf, petiole, stem, and root) was significantly lower than in corresponding organs of control plants; the greatest difference was seen in leaves”
t0“cowpea”
Claim · model-written summary
Leaf α-amylase activity increased significantly within six days of drought.
- Taxon
- cowpeaVigna unguiculatat0
- Organ / stage
- leavese0
- Treatment
- drought stresse0
- Outcome
- α- and β-amylase activitiese0
- Direction
- increasede0
- Qualifier
- within the first 6 de0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“α- and β-amylase activities in leaves significantly increased within the first 6 d of drought stress”
t0“cowpea”
Claim · model-written summary
The authors infer that photoassimilate translocation from source organs maintained cowpea grain yield under drought.
- Taxon
- cowpeaVigna unguiculatae0
- Organ / stage
- source organse0
- Treatment
- drought stresse0
- Outcome
- grain yield is maintainede0
- Qualifier
- by translocation of photoassimilates from source organse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“in cowpea subjected to drought stress during grain filling, the grain yield is maintained, despite a dramatic decrease in photosynthetic rate, by translocation of photoassimilates from source organs”
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See all 7 papers →Claims are grouped by organism, treatment and what was measured or targeted. A paper counts as positive when any of its claims in the group is positive.