Abstract
Two winter wheat ( Triticum aestivum L.)varieties differing in grain protein content, Wanmai 38 and Yangmai 9 potted in a greenhouse, were used to investigate the effects of soil drought (SRWC=45%-50%) and waterlogging beginning from 4 days after anthesis (DPA) on the activities of key regulatory enzymes of grain starch and protein accumulation. The results in both leaves and grains showed that the patterns of changes in the activities of enzymes were similar in the two varieties. Compared with CK (SRWC= 75%-80%) , sucrose content and sucrose phosphate synthase (SPS) activity declined more markedly than amino acid content and glutamine synthetase (GS) activity under drought and waterlogging. Both drought and waterlogging resulted in decreases in the activities of sucrose synthase (SS) and granule-bound starch synthase (GBSS), and especially in that of soluble starch synthase (SSS). And more marked decreases in the activity of SS occurred under drought than under waterlogging. Compared with CK, GS and glutamate pyruvic aminotransferase (GPT) activities in grain decreased markedly under waterlogging, but decreased a little under drought. By correlation analyses, it was found that the SPS, SSS and GBSS activities were more closely correlated than SS to the yield and grain starch, and GS activity in grain was correlated to a lower degree to the yield and content of grain protein than GS in leaf and GPT in grain. Further analysis revealed that the changes in activity of key regulatory enzymes of grain starch and protein accumulation in source and sink organs of wheat were the main factors through which different post-anthesis soil water status affected grain starch and protein characters.
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Claims 10
Claim · model-written summary
The two wheat varieties had similar enzyme activity change patterns in leaves and grains.
- Taxon
- Wheat
Triticum aestivumt0 - Organ / stage
- leaves and grainse0
- Outcome
- patterns of changes in the activities of enzymese0
- Direction
- similare0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The results in both leaves and grains showed that the patterns of changes in the activities of enzymes were similar in the two varieties”
t0“Wheat”
Claim · model-written summary
Drought and waterlogging reduced sucrose content and SPS activity more markedly than amino acid content and GS activity versus control.
- Taxon
- Triticum aestivum L.Triticum aestivume1
- Treatment
- drought and waterlogginge0
- Outcome
- sucrose content and sucrose phosphate synthase (SPS) activitye0
- Direction
- declinede0
- Comparator
- CKe0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Compared with CK (SRWC= 75%-80%) , sucrose content and sucrose phosphate synthase (SPS) activity declined more markedly than amino acid content and glutamine synthetase (GS) activity under drought and waterlogging”
e1“Two winter wheat ( Triticum aestivum L.)varieties”
Claim · model-written summary
Drought and waterlogging decreased SS and GBSS activities.
- Taxon
- Triticum aestivum L.Triticum aestivume1
- Treatment
- drought and waterlogginge0
- Outcome
- activities of sucrose synthase (SS) and granule-bound starch synthase (GBSS)e0
- Direction
- decreasese0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Both drought and waterlogging resulted in decreases in the activities of sucrose synthase (SS) and granule-bound starch synthase (GBSS), and especially in that of soluble starch synthase (SSS)”
e1“Two winter wheat ( Triticum aestivum L.)varieties”
Claim · model-written summary
Drought and waterlogging especially decreased SSS activity.
- Taxon
- Triticum aestivum L.Triticum aestivume2
- Treatment
- drought and waterlogginge1
- Outcome
- soluble starch synthase (SSS)e0
- Direction
- decreasese1
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“and especially in that of soluble starch synthase (SSS)”
e1“Both drought and waterlogging resulted in decreases in the activities of sucrose synthase (SS) and granule-bound starch synthase (GBSS), and especially in that of soluble starch synthase (SSS)”
e2“Two winter wheat ( Triticum aestivum L.)varieties”
Claim · model-written summary
SS activity decreased more under drought than waterlogging.
- Taxon
- WheatTriticum aestivumt0
- Treatment
- droughte0
- Outcome
- activity of SSe0
- Direction
- more marked decreasese0
- Comparator
- waterlogginge0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“more marked decreases in the activity of SS occurred under drought than under waterlogging”
t0“Wheat”
Claim · model-written summary
Waterlogging markedly decreased grain GS and GPT activities versus control.
- Taxon
- WheatTriticum aestivumt0
- Organ / stage
- graine0
- Treatment
- waterlogginge0
- Outcome
- GS and glutamate pyruvic aminotransferase (GPT) activitiese0
- Direction
- decreased markedlye0
- Comparator
- CKe0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Compared with CK, GS and glutamate pyruvic aminotransferase (GPT) activities in grain decreased markedly under waterlogging”
t0“Wheat”
Claim · model-written summary
Drought decreased grain GS and GPT activities a little versus control.
- Taxon
- WheatTriticum aestivumt0
- Organ / stage
- graine0
- Treatment
- droughte0
- Outcome
- GS and glutamate pyruvic aminotransferase (GPT) activitiese0
- Direction
- decreased a littlee0
- Comparator
- CKe0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Compared with CK, GS and glutamate pyruvic aminotransferase (GPT) activities in grain decreased markedly under waterlogging, but decreased a little under drought”
t0“Wheat”
Claim · model-written summary
SPS, SSS and GBSS activities correlated more closely with yield and grain starch than SS did.
- Taxon
- WheatTriticum aestivumt0
- Gene
- SPS, SSS and GBSSe0
- Outcome
- yield and grain starche0
- Comparator
- SSe0
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the SPS, SSS and GBSS activities were more closely correlated than SS to the yield and grain starch”
t0“Wheat”
Claim · model-written summary
Grain GS activity correlated less closely with yield and grain protein than leaf GS and grain GPT activities did.
- Taxon
- WheatTriticum aestivumt0
- Gene
- GSe0
- Outcome
- yield and content of grain proteine0
- Comparator
- GS in leaf and GPT in graine0
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“GS activity in grain was correlated to a lower degree to the yield and content of grain protein than GS in leaf and GPT in grain”
t0“Wheat”
Claim · model-written summary
Changes in regulatory enzyme activities were identified as the main factors linking post-anthesis water status to wheat grain starch and protein characters.
- Taxon
- wheatTriticum aestivume0
- Outcome
- grain starch and protein characterse0
- Qualifier
- changes in activity of key regulatory enzymese0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the changes in activity of key regulatory enzymes of grain starch and protein accumulation in source and sink organs of wheat were the main factors through which different post-anthesis soil water status affected grain starch and protein characters”
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