Abstract
The purpose of this study is to determine the effect of light quality on growth, carbon and nitrogen metabolism, and antioxidant defense system of rice seedlings. Six light conditions were employed, including white (W), red (R), blue (B), combined LED of R and B at 3:1 (R3B1), combined LED of R and B at 1:1 (R1B1), as well as combined LED of R and B at 1:3 (R1B3). Combined application of red light and blue light could promote the growth of rice seedling leaves and roots under low light stress to varying degrees, increase the photosynthetic area by increasing the leaf area, improve the root characteristics by increasing the root volume, and increase the dry matter accumulation of rice seedlings. In addition, the combination of red light and blue light could increase carbon and nitrogen metabolites in rice seedling leaves, regulate the expression of genes related to carbon and nitrogen metabolism and enzyme activity, and enhance the antioxidant enzyme activity of rice seedlings. These results indicate that red light and blue light directly have synergistic effects which can regulate the carbon and nitrogen metabolism of rice seedlings, promote the morphogenesis of rice seedlings under low light stress, and promote growth, which has never been reported in previous studies. This study is a new discovery in the application of light quality in crop production and provides new avenues to enhance crop stress resistance. However, further study is needed to explore the physio-biochemical and molecular mechanisms of light quality in crop production.
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Claims 9
Claim · model-written summary
Combined red and blue light promoted leaf and root growth.
- Taxon
- rice
Oryza sativae0t0e2e3
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Combined application of red light and blue light could promote the growth of rice seedling leaves and roots under low light stress to varying degrees”
t0“Rice Seedlings”
e2“Combined application of red light and blue light”
e3“the combination of red light and blue light could increase carbon and nitrogen metabolites in rice seedling leaves”
Claim · model-written summary
Combined light increased leaf area and photosynthetic area.
- Taxon
- riceOryza sativae0t0e2e3
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“increase the photosynthetic area by increasing the leaf area”
t0“Rice Seedlings”
e2“Combined application of red light and blue light”
e3“the combination of red light and blue light could increase carbon and nitrogen metabolites in rice seedling leaves”
Claim · model-written summary
Combined light increased root volume.
- Taxon
- riceOryza sativae0t0e2e3
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“improve the root characteristics by increasing the root volume”
t0“Rice Seedlings”
e2“Combined application of red light and blue light”
e3“the combination of red light and blue light could increase carbon and nitrogen metabolites in rice seedling leaves”
Claim · model-written summary
Combined light increased seedling dry matter accumulation.
- Taxon
- riceOryza sativae0t0e2e3
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“increase the dry matter accumulation of rice seedlings”
t0“Rice Seedlings”
e2“Combined application of red light and blue light”
e3“the combination of red light and blue light could increase carbon and nitrogen metabolites in rice seedling leaves”
Claim · model-written summary
Combined light increased carbon and nitrogen metabolites.
- Taxon
- riceOryza sativae0t0e2e3
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the combination of red light and blue light could increase carbon and nitrogen metabolites in rice seedling leaves”
t0“Rice Seedlings”
e2“Combined application of red light and blue light”
e3“the combination of red light and blue light could increase carbon and nitrogen metabolites in rice seedling leaves”
Claim · model-written summary
Combined light regulated carbon and nitrogen metabolism gene expression.
- Taxon
- riceOryza sativae0t0e2e3
Not reportedComparatorDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“regulate the expression of genes related to carbon and nitrogen metabolism and enzyme activity”
t0“Rice Seedlings”
e2“Combined application of red light and blue light”
e3“the combination of red light and blue light could increase carbon and nitrogen metabolites in rice seedling leaves”
Claim · model-written summary
Combined light altered carbon and nitrogen metabolism enzyme activity.
- Taxon
- riceOryza sativae0t0e2e3
Not reportedComparatorDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“regulate the expression of genes related to carbon and nitrogen metabolism and enzyme activity”
t0“Rice Seedlings”
e2“Combined application of red light and blue light”
e3“the combination of red light and blue light could increase carbon and nitrogen metabolites in rice seedling leaves”
Claim · model-written summary
Combined light enhanced antioxidant enzyme activity.
- Taxon
- riceOryza sativae0t0e2e3
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“enhance the antioxidant enzyme activity of rice seedlings”
t0“Rice Seedlings”
e2“Combined application of red light and blue light”
e3“the combination of red light and blue light could increase carbon and nitrogen metabolites in rice seedling leaves”
Claim · model-written summary
Authors interpret red and blue light as synergistic for seedling morphogenesis and growth.
- Taxon
- riceOryza sativae0t0e2e3
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“red light and blue light directly have synergistic effects which can regulate the carbon and nitrogen metabolism of rice seedlings, promote the morphogenesis of rice seedlings under low light stress, and promote growth”
t0“Rice Seedlings”
e2“Combined application of red light and blue light”
e3“the combination of red light and blue light could increase carbon and nitrogen metabolites in rice seedling leaves”
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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.