Abstract
Four winter wheat( Triticum aestivum L.) genotypes differing in grain protein content, Heixiaomai 76, Wanmai 38, Yangmai 10 and Yangmai 9, were used in pot experiment in greenhouse to investigate the effects of drought (Soil relative water content, SRWC=45%-50%), waterlogging and moderate soil water status (SRWC=75%-80%) after anthesis on net photosynthesis and chlorophyll contents of flag leaves, remobilization of assimilates stored before anthesis, transportation of post-anthesis assimilates, and contents and yields of starch and protein in grain at maturity. It was found that the photosynthetic active duration (PAD) and the relative steady phase of chlorophyll content( RSP) of flag leaves of four wheat genotypes were shortened by both drought and waterlogging. Values of PAD and RSP declined from CK, via waterlogging then drought. The remobilization rate of pre-anthesis stored assimilates was the highest for CK, while the lowest for waterlogging. The amounts of post-anthesis assimilates and accumulated nitrogen transferring into grain were declined as CKwaterloggingdrought and CKdroughtwaterlogging, respectively. The yield of grain protein significantly decreased at 5% level with the order of CK drought waterlogging in four wheat genotypes. The contents of grain protein increased significantly under drought, but had no significant difference between CK and waterlogging. Compared with CK, starch yield significantly decreased under drought and waterlogging in four wheat genotypes, but starch content was various among four wheat genotypes. These results showed that the amount of post-anthesis assimilates transferring into grain decreased distinctly under drought, while the remobilization of pre-anthesis stored nitrogen and the transferring of post-anthesis accumulated nitrogen into grain declined distinctly under waterlogging, which led to differences in protein and starch contents of wheat grains under post-anthesis drought and waterlogging. It is inferred that the transferring of post-anthesis accumulated nitrogen into grain and the remobilization of pre-anthesis stored nitrogen were vital factors to determine protein yield under the drought and waterlogging condition, respectively.
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Claims 19
Claim · model-written summary
Drought shortened flag-leaf photosynthetic active duration.
- Taxon
- Winter Wheat
Triticum aestivumt0 - Organ / stage
- flag leavese0
- Treatment
- droughte0
- Outcome
- photosynthetic active duratione0
- Direction
- shortenede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Winter Wheat”
e0“photosynthetic active duration (PAD) and the relative steady phase of chlorophyll content( RSP) of flag leaves of four wheat genotypes were shortened by both drought and waterlogging”
Claim · model-written summary
Waterlogging shortened flag-leaf photosynthetic active duration.
- Taxon
- Winter WheatTriticum aestivumt0
- Treatment
- waterlogginge0
- Outcome
- photosynthetic active duratione0
- Direction
- shortenede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Winter Wheat”
e0“photosynthetic active duration (PAD) and the relative steady phase of chlorophyll content( RSP) of flag leaves of four wheat genotypes were shortened by both drought and waterlogging”
Claim · model-written summary
Drought shortened the relative steady phase of flag-leaf chlorophyll content.
- Taxon
- Winter WheatTriticum aestivumt0
- Treatment
- droughte0
- Outcome
- relative steady phase of chlorophyll contente0
- Direction
- shortenede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Winter Wheat”
e0“photosynthetic active duration (PAD) and the relative steady phase of chlorophyll content( RSP) of flag leaves of four wheat genotypes were shortened by both drought and waterlogging”
Claim · model-written summary
Waterlogging shortened the relative steady phase of flag-leaf chlorophyll content.
- Taxon
- Winter WheatTriticum aestivumt0
- Treatment
- waterlogginge0
- Outcome
- relative steady phase of chlorophyll contente0
- Direction
- shortenede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Winter Wheat”
e0“photosynthetic active duration (PAD) and the relative steady phase of chlorophyll content( RSP) of flag leaves of four wheat genotypes were shortened by both drought and waterlogging”
Claim · model-written summary
Photosynthetic active duration and chlorophyll steady-phase duration were highest in controls, intermediate under waterlogging, and lowest under drought.
- Taxon
- Winter WheatTriticum aestivumt0
- Outcome
- Values of PAD and RSPe0
- Direction
- declinede0
- Comparator
- CKe0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Winter Wheat”
e0“Values of PAD and RSP declined from CK, via waterlogging then drought”
Claim · model-written summary
Remobilization of pre-anthesis stored assimilates was highest in controls and lowest under waterlogging.
- Taxon
- Winter WheatTriticum aestivumt0
- Treatment
- waterlogginge0
- Outcome
- remobilization rate of pre-anthesis stored assimilatese0
- Direction
- loweste0
- Comparator
- CKe0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Winter Wheat”
e0“The remobilization rate of pre-anthesis stored assimilates was the highest for CK, while the lowest for waterlogging”
Claim · model-written summary
Post-anthesis assimilates transferred into grain ranked control, waterlogging, then drought.
- Taxon
- Winter WheatTriticum aestivumt0
- Outcome
- amounts of post-anthesis assimilatese0
- Direction
- declinede0
- Qualifier
- CKwaterloggingdroughte0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Winter Wheat”
e0“The amounts of post-anthesis assimilates and accumulated nitrogen transferring into grain were declined as CKwaterloggingdrought and CKdroughtwaterlogging, respectively”
Claim · model-written summary
Accumulated nitrogen transferred into grain ranked control, drought, then waterlogging.
- Taxon
- Winter WheatTriticum aestivumt0
- Outcome
- accumulated nitrogen transferring into graine0
- Direction
- declinede0
- Qualifier
- CKdroughtwaterlogginge0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Winter Wheat”
e0“The amounts of post-anthesis assimilates and accumulated nitrogen transferring into grain were declined as CKwaterloggingdrought and CKdroughtwaterlogging, respectively”
Claim · model-written summary
Grain protein yield decreased significantly from control to drought to waterlogging across four genotypes.
- Taxon
- Winter WheatTriticum aestivumt0
- Treatment
- drought waterlogginge0
- Outcome
- yield of grain proteine0
- Direction
- decreasede0
- Qualifier
- 5% levele0
- Comparator
- CKe0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Winter Wheat”
e0“The yield of grain protein significantly decreased at 5% level with the order of CK drought waterlogging in four wheat genotypes”
Claim · model-written summary
Drought significantly increased grain protein content.
- Taxon
- Winter WheatTriticum aestivumt0
- Treatment
- droughte0
- Outcome
- contents of grain proteine0
- Direction
- increasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Winter Wheat”
e0“The contents of grain protein increased significantly under drought”
Claim · model-written summary
Grain protein content did not differ significantly between control and waterlogging.
- Taxon
- Winter WheatTriticum aestivumt0
- Treatment
- waterlogginge0
- Outcome
- no significant differencee0
- Comparator
- CKe0
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Winter Wheat”
e0“had no significant difference between CK and waterlogging”
Claim · model-written summary
Starch yield significantly decreased under drought compared with control.
- Taxon
- Winter WheatTriticum aestivumt0
- Treatment
- droughte0
- Outcome
- starch yielde0
- Direction
- decreasede0
- Comparator
- CKe0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Winter Wheat”
e0“Compared with CK, starch yield significantly decreased under drought and waterlogging in four wheat genotypes”
Claim · model-written summary
Starch yield significantly decreased under waterlogging compared with control.
- Taxon
- Winter WheatTriticum aestivumt0
- Treatment
- waterlogginge0
- Outcome
- starch yielde0
- Direction
- decreasede0
- Comparator
- CKe0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Winter Wheat”
e0“Compared with CK, starch yield significantly decreased under drought and waterlogging in four wheat genotypes”
Claim · model-written summary
Starch content varied among the four wheat genotypes.
- Taxon
- Winter WheatTriticum aestivumt0
- Outcome
- starch contente0
- Direction
- variouse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Winter Wheat”
e0“starch content was various among four wheat genotypes”
Claim · model-written summary
Drought distinctly decreased post-anthesis assimilate transfer into grain.
- Taxon
- Winter WheatTriticum aestivumt0
- Treatment
- droughte0
- Outcome
- amount of post-anthesis assimilates transferring into graine0
- Direction
- decreasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Winter Wheat”
e0“the amount of post-anthesis assimilates transferring into grain decreased distinctly under drought”
Claim · model-written summary
Waterlogging distinctly decreased remobilization of pre-anthesis stored nitrogen.
- Taxon
- Winter WheatTriticum aestivumt0
- Treatment
- waterlogginge0
- Outcome
- remobilization of pre-anthesis stored nitrogene0
- Direction
- declinede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Winter Wheat”
e0“the remobilization of pre-anthesis stored nitrogen and the transferring of post-anthesis accumulated nitrogen into grain declined distinctly under waterlogging”
Claim · model-written summary
Waterlogging distinctly decreased transfer of post-anthesis accumulated nitrogen into grain.
- Taxon
- Winter WheatTriticum aestivumt0
- Treatment
- waterlogginge0
- Outcome
- transferring of post-anthesis accumulated nitrogen into graine0
- Direction
- declinede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Winter Wheat”
e0“the remobilization of pre-anthesis stored nitrogen and the transferring of post-anthesis accumulated nitrogen into grain declined distinctly under waterlogging”
Claim · model-written summary
The authors infer that post-anthesis accumulated nitrogen transfer determines protein yield under drought.
- Taxon
- Winter WheatTriticum aestivumt0
- Treatment
- droughte0
- Outcome
- protein yielde0
- Qualifier
- transferring of post-anthesis accumulated nitrogen into graine0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Winter Wheat”
e0“the transferring of post-anthesis accumulated nitrogen into grain and the remobilization of pre-anthesis stored nitrogen were vital factors to determine protein yield under the drought and waterlogging condition, respectively”
Claim · model-written summary
The authors infer that remobilization of pre-anthesis stored nitrogen determines protein yield under waterlogging.
- Taxon
- Winter WheatTriticum aestivumt0
- Treatment
- waterlogginge0
- Outcome
- protein yielde0
- Qualifier
- remobilization of pre-anthesis stored nitrogene0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Winter Wheat”
e0“the transferring of post-anthesis accumulated nitrogen into grain and the remobilization of pre-anthesis stored nitrogen were vital factors to determine protein yield under the drought and waterlogging condition, respectively”
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