Antagonistic regulation of the gibberellic acid response during stem growth in rice.

Nature
Keisuke NagaiMotoyuki Ashikari

Abstract

The size of plants is largely determined by growth of the stem. Stem elongation is stimulated by gibberellic acid1-3. Here we show that internode stem elongation in rice is regulated antagonistically by an 'accelerator' and a 'decelerator' in concert with gibberellic acid. Expression of a gene we name ACCELERATOR OF INTERNODE ELONGATION 1 (ACE1), which encodes a protein of unknown function, confers cells of the intercalary meristematic region with the competence for cell division, leading to internode elongation in the presence of gibberellic acid. By contrast, upregulation of DECELERATOR OF INTERNODE ELONGATION 1 (DEC1), which encodes a zinc-finger transcription factor, suppresses internode elongation, whereas downregulation of DEC1 allows internode elongation. We also show that the mechanism of internode elongation that is mediated by ACE1 and DEC1 is conserved in the Gramineae family. Furthermore, an analysis of genetic diversity suggests that mutations in ACE1 and DEC1 have historically contributed to the selection of shorter plants in domesticated populations of rice to increase their resistance to lodging, and of taller plants in wild species of rice for adaptation to growth in deep water. Our identification of these anta...Continue Reading

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Citations

Jul 17, 2020·Nature·Julia Bailey-Serres, Laurentius A C J Voesenek
Jan 28, 2021·International Journal of Molecular Sciences·Weitao JiaShengjun Wu
Jan 30, 2021·Trends in Plant Science·Tom RankenbergRashmi Sasidharan
Jan 21, 2021·International Journal of Molecular Sciences·Gaojie LiHongwei Hou
Apr 24, 2021·Frontiers in Genetics·Rakesh KumarAnirudh Kumar
Jul 29, 2021·Plant Science : an International Journal of Experimental Plant Biology·Yuhan DongShenchun Qu

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Methods Mentioned

BETA
transgenic
one-hybrid
electrophoresis
Protein Assay
Light-Capture II
genotyping
PCR
phosphotransferase

Software Mentioned

Beagle
R
qtl
ZEN
BWA
eqtl
selscan
Prism

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