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

The size of plants is largely determined by growth of the stem. Stem elongation is stimulated by gibberellic acid 1 – 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 w...

Full description

Saved in:

Bibliographic Details
Published in:	Nature (London) Vol. 584; no. 7819; pp. 109 - 114
Main Authors:	Nagai, Keisuke, Mori, Yoshinao, Ishikawa, Shin, Furuta, Tomoyuki, Gamuyao, Rico, Niimi, Yoko, Hobo, Tokunori, Fukuda, Moyuri, Kojima, Mikiko, Takebayashi, Yumiko, Fukushima, Atsushi, Himuro, Yasuyo, Kobayashi, Masatomo, Ackley, Wataru, Hisano, Hiroshi, Sato, Kazuhiro, Yoshida, Aya, Wu, Jianzhong, Sakakibara, Hitoshi, Sato, Yutaka, Tsuji, Hiroyuki, Akagi, Takashi, Ashikari, Motoyuki
Format:	Journal Article
Language:	English
Published:	London Nature Publishing Group UK 06-08-2020 Nature Publishing Group
Subjects:	13/1 13/44 13/51 13/89 14/19 14/34 38/22 38/23 38/39 38/77 38/90 45/41 631/449/1741/1521 631/449/2653 631/449/711 82/29 Acclimatization Acids Biosynthesis Cell division Chromosomes Deceleration Deep water Elongation Gene expression Genes Genetic analysis Genetic diversity Gibberellic acid Gibberellins - metabolism Humanities and Social Sciences Lodging multidisciplinary Mutation Oryza - genetics Oryza - growth & development Oryza - metabolism Plant Growth Regulators - metabolism Plant Proteins - genetics Plant Proteins - metabolism Plant Stems - genetics Plant Stems - growth & development Plant Stems - metabolism Quantitative Trait Loci Regulation Rice Science Science (multidisciplinary) Signal Transduction Stems Zinc finger proteins
Online Access:	Get full text
Tags:	Add Tag No Tags, Be the first to tag this record!

Description
Summary:	The size of plants is largely determined by growth of the stem. Stem elongation is stimulated by gibberellic acid 1 – 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 antagonistic regulatory factors enhances our understanding of the gibberellic acid response as an additional mechanism that regulates internode elongation and environmental fitness, beyond biosynthesis and gibberellic acid signal transduction. Stem growth in rice is regulated by an accelerator gene and a decelerator gene in parallel with gibberellic acid, and the opposite selection of these genes has led to adaptations to different environments.
Bibliography:	ObjectType-Article-1 SourceType-Scholarly Journals-1 ObjectType-Feature-2 content type line 23
ISSN:	0028-0836 1476-4687
DOI:	10.1038/s41586-020-2501-8