Abstract
Low light (LL) stress is an important abiotic stress of wet season which adversely affects starch biosynthesis and results in drastic reduction in rice grain yield. In general, the grain yield decreases together with reduction in the amylose (AC) and resistant starch (RS) contents while the glycemic index (GI) values increased in plants exposed to LL stress. This is the first report of the effect of LL stress on RS and GI values. In the present investigation, 14 rice genotypes are studied for the effect of LL stress on AC, RS, and GI of the grains. Rice genotypes, Purnendu and Shashi differ in exhibiting relatively much lower reduction in AC and RS and hence little change in their GI values under LL stress, while wide variation is observed for the rest of the genotypes. The grain yields of Purnendu and Shashi are also not much affected by the LL stress. There is a dramatic increase in the expression levels of the gbssI in the middle stage of grain development in the two genotypes (Purnendu and Mahisugandha with contrasting RS, AC, and GI). Maximum expression of the gene was observed in Purnendu at middle stage showing a positive correlation between RS and gbssI expression. As rice is grown mainly in wet season, the identification of rice genotypes which do not permit much change in RS value when grown under LL and hence no significant increase in the GI value, would help to develop better rice varieties for consumption by diabetics.
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Claims 6
Claim · model-written summary
Purnendu and Shashi showed relatively much lower reduction in amylose and resistant starch under low light stress than the other genotypes.
- Taxon
- rice ( O. sativa L)
Oryza sativat0 - Material
- Purnendu and Shashie1
- Treatment
- LL stresse1
- Outcome
- reduction in AC and RSe1
- Direction
- lower reductione1
- Comparator
- the rest of the genotypese1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“rice ( O. sativa L)”
e1“Rice genotypes, Purnendu and Shashi differ in exhibiting relatively much lower reduction in AC and RS and hence little change in their GI values under LL stress, while wide variation is observed for the rest of the genotypes”
Claim · model-written summary
Purnendu and Shashi showed little change in glycemic index values under low light stress.
- Taxon
- rice ( O. sativa L)Oryza sativat0
- Material
- Purnendu and Shashie1
- Treatment
- LL stresse1
- Outcome
- GI valuese1
- Direction
- little changee1
- Comparator
- the rest of the genotypese1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“rice ( O. sativa L)”
e1“Rice genotypes, Purnendu and Shashi differ in exhibiting relatively much lower reduction in AC and RS and hence little change in their GI values under LL stress, while wide variation is observed for the rest of the genotypes”
Claim · model-written summary
Grain yields of Purnendu and Shashi were not much affected by low light stress.
- Taxon
- rice ( O. sativa L)Oryza sativat0
- Material
- Purnendu and Shashie2
- Treatment
- LL stresse2
- Outcome
- grain yieldse2
- Direction
- not much affectede2
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“rice ( O. sativa L)”
e2“The grain yields of Purnendu and Shashi are also not much affected by the LL stress”
Claim · model-written summary
The gbssI expression increased strongly in the middle stage of grain development in Purnendu and Mahisugandha.
- Taxon
- rice ( O. sativa L)Oryza sativat0
- Material
- Purnendu and Mahisugandhae3
- Organ / stage
- middle stage of grain developmente3
- Gene
- gbssIe3
- Outcome
- expression levels of the gbssIe3
- Direction
- increasee3
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“rice ( O. sativa L)”
e3“There is a dramatic increase in the expression levels of the gbssI in the middle stage of grain development in the two genotypes (Purnendu and Mahisugandha with contrasting RS, AC, and GI)”
Claim · model-written summary
Expression of gbssI was positively correlated with resistant starch in Purnendu.
- Taxon
- rice ( O. sativa L)Oryza sativat0
- Material
- Purnendue4
- Gene
- gbssIe4
- Outcome
- RS and gbssI expressione4
- Direction
- positivee4
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“rice ( O. sativa L)”
e4“Maximum expression of the gene was observed in Purnendu at middle stage showing a positive correlation between RS and gbssI expression”
Claim · model-written summary
Maximum gbssI expression was observed in Purnendu at the middle stage.
- Taxon
- rice ( O. sativa L)Oryza sativat0
- Material
- Purnendue4
- Organ / stage
- middle stagee4
- Gene
- gbssIe4
- Outcome
- Maximum expressione4
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“rice ( O. sativa L)”
e4“Maximum expression of the gene was observed in Purnendu at middle stage showing a positive correlation between RS and gbssI expression”
The same questions in other papers
light · yield · Oryza sativa (rice)Results differ
35 papers in the same direction as this paper · 32 in the opposite direction
- positive
- negative
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See all 68 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.