Abstract
Nitrogen (N) fertilizer application ensures crop production and food security worldwide. N-controlled boosting of shoot branching that is also referred as tillering can improve planting density for increasing grain yield of cereals. Here, we report that Sugar Transporter Protein 28 (OsSTP28) as a key regulator of N-responsive tillering and yield formation in rice. N supply inhibits the expression of OsSTP28, resulting in glucose accumulation in the apoplast of tiller buds, which in turn suppresses the expression of a transcriptional inhibitor ORYZA SATIVA HOMEOBOX 15 (OSH15) via an epigenetic mechanism to activate gibberellin 2-oxidases (GA2oxs)-facilitated gibberellin catabolism in shoot base. Thereby, OsSTP28-OSH15-GA2oxs module reduces the level of bioactive gibberellin in shoot base upon increased N supply, and consequently promotes tillering and grain yield. Moreover, we identify an elite allele of OsSTP28 that can effectively promote N-responsive tillering and yield formation, thus representing a valuable breeding target of N use efficiency improvement for agricultural sustainability. A sugar transporter OsSTP28 is identified as a regulator of nitrogen-response tillering and yield formation in rice. Nitrogen supply represses the expression of OsSTP28 to fine turn the level of apoplastic glucose in shoot base, which in turn activates gibberellin catabolism.
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Claims 6
Claim · model-written summary
N supply inhibits the expression of OsSTP28 in rice.
- Taxon
- rice
Oryza sativae1 - Treatment
- N supplye0
- Gene
- OsSTP28e0
- Outcome
- expression of OsSTP28e0
- Direction
- inhibitse0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“N supply inhibits the expression of OsSTP28”
e1“key regulator of N-responsive tillering and yield formation in rice”
Claim · model-written summary
N-regulated OsSTP28 expression results in glucose accumulation in the apoplast of rice tiller buds.
- Taxon
- riceOryza sativae1
- Organ / stage
- tiller budse2
- Outcome
- glucose accumulation in the apoplast of tiller budse2
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“key regulator of N-responsive tillering and yield formation in rice”
e2“resulting in glucose accumulation in the apoplast of tiller buds”
Claim · model-written summary
Rice OSH15 is a transcriptional inhibitor whose expression is suppressed via an epigenetic mechanism.
- Taxon
- riceOryza sativae1
- Gene
- OSH15e3
- Outcome
- expression of a transcriptional inhibitore3
- Qualifier
- via an epigenetic mechanisme3
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“key regulator of N-responsive tillering and yield formation in rice”
e3“which in turn suppresses the expression of a transcriptional inhibitor ORYZA SATIVA HOMEOBOX 15 (OSH15) via an epigenetic mechanism”
Claim · model-written summary
Increased N supply reduces the level of bioactive gibberellin in rice shoot base through the OsSTP28-OSH15-GA2oxs module.
- Taxon
- riceOryza sativae1
- Treatment
- increased N supplye4
- Gene
- OsSTP28-OSH15-GA2oxs modulee4
- Outcome
- level of bioactive gibberellin in shoot basee4
- Direction
- reducese4
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“key regulator of N-responsive tillering and yield formation in rice”
e4“Thereby, OsSTP28-OSH15-GA2oxs module reduces the level of bioactive gibberellin in shoot base upon increased N supply, and consequently promotes tillering and grain yield”
Claim · model-written summary
Increased N supply promotes tillering and grain yield in rice through the OsSTP28-OSH15-GA2oxs module.
- Taxon
- riceOryza sativae1
- Treatment
- increased N supplye4
- Outcome
- tillering and grain yielde4
- Direction
- promotese4
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“key regulator of N-responsive tillering and yield formation in rice”
e4“Thereby, OsSTP28-OSH15-GA2oxs module reduces the level of bioactive gibberellin in shoot base upon increased N supply, and consequently promotes tillering and grain yield”
Claim · model-written summary
An elite allele of OsSTP28 promotes N-responsive tillering and yield formation in rice.
- Taxon
- riceOryza sativae1
- Treatment
- elite allele of OsSTP28e5
- Gene
- OsSTP28e5
- Outcome
- N-responsive tillering and yield formatione5
- Direction
- promotee5
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“key regulator of N-responsive tillering and yield formation in rice”
e5“we identify an elite allele of OsSTP28 that can effectively promote N-responsive tillering and yield formation”
The same questions in other papers
nitrogen · yield · Oryza sativa (rice)Positive and negative results
1,802 papers in the same direction as this paper · 193 in the opposite direction · 49 reporting no difference from an alternative
- positive
- negative
- negative
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