Abstract
Photosynthetic properties were investigated in isolated thylakoid membranes in flag leaves of two newly-developed wheat(Triticum aesticum L.)varieties,Ningmai 8(NM8)and Ningmai 9(NM9)during the grain-filling stage,in order to elucidate both changes of flag leaf thylakoid membrane and variety differences under light stress(2 500μmol·m-2·s-1).The results showed that the contents of chlorophyⅡ decreased with strong light-treated time delaying.Also,light absorbing and fluorescence emission intensities weakened.The contents of unsaturated fatty acids of thylakoid membrane lipids decreased and the saturated fatty acids increased with stressing time,resulting in a reduction in the index of unsaturation of fatty acid(IUFA).Correlation analysis showed that there were distinctly positive relationship between IUFA and the electron transport activities of PSⅡ.Higher IUFA and chlorophyⅡ contents and more O2-evolving activity were found in NM9 than those in NM 8 under light stress,and NM9 may have more resistance to photoinhibition of high light than NM8.
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Claims 9
Claim · model-written summary
Chlorophyll content decreased as strong-light treatment continued.
- Taxon
- Wheat
Triticum aestivumt0 - Treatment
- strong light-treated timee0
- Outcome
- contents of chlorophyⅡe0
- Direction
- decreasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the contents of chlorophyⅡ decreased with strong light-treated time delaying”
t0“Wheat Flag Leaf under Light Stress”
Claim · model-written summary
Light absorption and fluorescence emission intensities weakened under continued light treatment.
- Taxon
- WheatTriticum aestivumt0
- Treatment
- Light Stresst0
- Outcome
- light absorbing and fluorescence emission intensitiese0
- Direction
- weakenede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“light absorbing and fluorescence emission intensities weakened”
t0“Wheat Flag Leaf under Light Stress”
Claim · model-written summary
Unsaturated fatty acids in thylakoid membrane lipids decreased with stress time.
- Taxon
- WheatTriticum aestivumt0
- Treatment
- stressing timee0
- Outcome
- contents of unsaturated fatty acids of thylakoid membrane lipidse0
- Direction
- decreasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The contents of unsaturated fatty acids of thylakoid membrane lipids decreased and the saturated fatty acids increased with stressing time”
t0“Wheat Flag Leaf under Light Stress”
Claim · model-written summary
Saturated fatty acids in thylakoid membrane lipids increased with stress time.
- Taxon
- WheatTriticum aestivumt0
- Treatment
- stressing timee0
- Outcome
- saturated fatty acidse0
- Direction
- increasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The contents of unsaturated fatty acids of thylakoid membrane lipids decreased and the saturated fatty acids increased with stressing time”
t0“Wheat Flag Leaf under Light Stress”
Claim · model-written summary
The fatty acid unsaturation index decreased with stress time.
- Taxon
- WheatTriticum aestivumt0
- Treatment
- Light Stresst0
- Outcome
- index of unsaturation of fatty acid(IUFA)e0
- Direction
- reductione0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“resulting in a reduction in the index of unsaturation of fatty acid(IUFA)”
t0“Wheat Flag Leaf under Light Stress”
Claim · model-written summary
IUFA was positively related to PSII electron transport activity.
- Taxon
- WheatTriticum aestivumt0
- Compound
- IUFAe0
- Outcome
- electron transport activities of PSⅡe0
- Direction
- positivee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“there were distinctly positive relationship between IUFA and the electron transport activities of PSⅡ”
t0“Wheat Flag Leaf under Light Stress”
Claim · model-written summary
NM9 had higher IUFA and chlorophyll content than NM8 under light stress.
- Taxon
- WheatTriticum aestivumt0
- Material
- NM9e0
- Treatment
- light stresse0
- Outcome
- IUFA and chlorophyⅡ contentse0
- Direction
- Highere0
- Comparator
- NM 8e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Higher IUFA and chlorophyⅡ contents and more O2-evolving activity were found in NM9 than those in NM 8 under light stress”
t0“Wheat Flag Leaf under Light Stress”
Claim · model-written summary
NM9 had greater O2-evolving activity than NM8 under light stress.
- Taxon
- WheatTriticum aestivumt0
- Material
- NM9e0
- Treatment
- light stresse0
- Outcome
- O2-evolving activitye0
- Direction
- moree0
- Comparator
- NM 8e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Higher IUFA and chlorophyⅡ contents and more O2-evolving activity were found in NM9 than those in NM 8 under light stress”
t0“Wheat Flag Leaf under Light Stress”
Claim · model-written summary
The authors infer that NM9 may resist high-light photoinhibition more than NM8.
- Taxon
- WheatTriticum aestivumt0
- Material
- NM9e0
- Outcome
- resistance to photoinhibition of high lighte0
- Direction
- moree0
- Qualifier
- maye0
- Comparator
- NM8e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“NM9 may have more resistance to photoinhibition of high light than NM8”
t0“Wheat Flag Leaf under Light Stress”