Abstract
Gibberellins are growth hormones that play a pivotal role in the growth and development of plants. Present investigations were carried to check the effect of nitrogen (N) and silicon (Si) on bioactive GA1 and its immediate precursor GA20 at different growth stages of two rice cultivars with different maturity traits. It was observed that the endogenous bioactive GA1 level gradually increased during vegetative stage and anthesis stage of both Junghwabyeo (early flowering cultivar) and Daesanbyeo (late flowering cultivar). However, the GA1 and GA20 content start decreasing during the seed filling stage in both rice cultivars, which indicated a possible relationship of bioactive GA1 and floral development. Our results also confirmed that early 13-hydroxylation pathway was operated at all developmental stages of rice plant. Variation in the levels of the endogenous gibberellins in rice shoots were measured by GCMS-SIM using H2-labeled gibberellins as internal standards. Combined application of N and Si enhanced growth parameters and reduced lodging index of both rice cultivars. It was thus concluded that the level of physiologically active GA1 increased during vegetative and early reproductive stage, but starts declining at seed filling stage.
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Claims 5
Claim · model-written summary
Bioactive GA1 increased through vegetative and anthesis stages in both cultivars.
- Taxon
- rice
Oryza sativat0 - Material
- Junghwabyeoe0
- Organ / stage
- vegetative stage and anthesis stagee0
- Outcome
- endogenous bioactive GA1 levele0
- Direction
- increasede0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the endogenous bioactive GA1 level gradually increased during vegetative stage and anthesis stage of both Junghwabyeo (early flowering cultivar) and Daesanbyeo (late flowering cultivar).”
t0“RICE”
Claim · model-written summary
GA1 and GA20 contents decreased during seed filling in both rice cultivars.
- Taxon
- riceOryza sativae0
- Organ / stage
- seed filling stagee0
- Outcome
- GA1 and GA20 contente0
- Direction
- decreasinge0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the GA1 and GA20 content start decreasing during the seed filling stage in both rice cultivars”
Claim · model-written summary
The early 13-hydroxylation pathway operated at all rice developmental stages.
- Taxon
- riceOryza sativae0
- Organ / stage
- all developmental stagese0
- Outcome
- early 13-hydroxylation pathway was operatede0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“early 13-hydroxylation pathway was operated at all developmental stages of rice plant.”
Claim · model-written summary
Combined nitrogen and silicon application enhanced growth parameters in both rice cultivars.
- Taxon
- riceOryza sativae0
- Treatment
- Combined application of N and Sie0
- Outcome
- growth parameterse0
- Direction
- enhancede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Combined application of N and Si enhanced growth parameters and reduced lodging index of both rice cultivars.”
Claim · model-written summary
Combined nitrogen and silicon application reduced lodging index in both rice cultivars.
- Taxon
- riceOryza sativae0
- Treatment
- Combined application of N and Sie0
- Outcome
- lodging indexe0
- Direction
- reducede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Combined application of N and Si enhanced growth parameters and reduced lodging index of both rice cultivars.”
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See all 511 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.