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NADP-malic Enzyme OsNADP-ME2 Modulates Plant Height Involving in Gibberellin Signaling in Rice.
- Source :
- Rice (19398425); 8/17/2024, Vol. 17 Issue 1, p1-10, 10p
- Publication Year :
- 2024
-
Abstract
- Plants NADP-malic enzymes (NADP-MEs) act as a class of oxidative decarboxylase to mediate malic acid metabolism in organisms. Despite NADP-MEs have been demonstrated to play pivotal roles in regulating diverse biological processes, the role of NADP-MEs involving in plant growth and development remains rarely known. Here, we characterized the function of rice cytosolic OsNADP-ME2 in regulating plant height. The results showed that RNAi silencing and knock-out of OsNADP-ME2 in rice results in a dwarf plant structure, associating with significant expression inhibition of genes involving in phytohormone Gibberellin (GA) biosynthesis and signaling transduction, but with up-regulation for the expression of GA signaling suppressor SLR1. The accumulation of major bioactive GA<subscript>1</subscript>, GA<subscript>4</subscript> and GA<subscript>7</subscript> are evidently altered in RNAi lines, and exogenous GA treatment compromises the dwarf phenotype of OsNADP-ME2 RNAi lines. RNAi silencing of OsNADP-ME2 also causes the reduction of NADP-ME activity associating with decreased production of pyruvate. Thus, our data revealed a novel function of plant NADP-MEs in modulation of rice plant height through regulating bioactive GAs accumulation and GA signaling, and provided a valuable gene resource for rice plant architecture improvement. [ABSTRACT FROM AUTHOR]
- Subjects :
- GERMPLASM
PLANT enzymes
RICE
ACTING education
MALIC acid
Subjects
Details
- Language :
- English
- ISSN :
- 19398425
- Volume :
- 17
- Issue :
- 1
- Database :
- Complementary Index
- Journal :
- Rice (19398425)
- Publication Type :
- Academic Journal
- Accession number :
- 179068018
- Full Text :
- https://doi.org/10.1186/s12284-024-00729-5