Ethylene-Inhibited Jasmonic Acid Biosynthesis Promotes Mesocotyl/Coleoptile Elongation of Etiolated Rice Seedlings

被引：121

作者：

Xiong, Qing ^{[1
,2
]}

Ma, Biao ^{[1
]}

Lu, Xiang ^{[1
,2
]}

Huang, Yi-Hua ^{[1
,2
]}

He, Si-Jie ^{[1
]}

Yang, Chao ^{[1
]}

Yin, Cui-Cui ^{[1
]}

Zhao, He ^{[1
,2
]}

Zhou, Yang ^{[1
,2
]}

Zhang, Wan-Ke ^{[1
]}

Wang, Wen-Sheng ^{[3
]}

Li, Zhi-Kang ^{[3
]}

Chen, Shou-Yi ^{[1
]}

Zhang, Jin-Song ^{[1
,2
]}

机构：

[1] Chinese Acad Sci, Inst Genet & Dev Biol, State Key Lab Plant Genom, Beijing 100101, Peoples R China

[2] Univ Chinese Acad Sci, Beijing 100049, Peoples R China

[3] Chinese Acad Agr Sci, Inst Crop Sci, Natl Key Facil Crop Gene Resources & Genet Improv, Beijing 100081, Peoples R China

来源：

PLANT CELL | 2017年 / 29卷 / 05期

基金：

中国国家自然科学基金;

关键词：

GENOME-WIDE ASSOCIATION; ALLENE-OXIDE-CYCLASE; ACYL-COA OXIDASE; MESOCOTYL ELONGATION; SEED-GERMINATION; ABSCISIC-ACID; SPIKELET DEVELOPMENT; GENE FAMILY; ARABIDOPSIS; GROWTH;

D O I：

10.1105/tpc.16.00981

中图分类号：

Q5 [生物化学]; Q7 [分子生物学];

学科分类号：

071010 ; 081704 ;

摘要：

Elongation of the mesocotyl and coleoptile facilitates the emergence of rice (Oryza sativa) seedlings from soil and is affected by various genetic and environment factors. The regulatory mechanism underlying this process remains largely unclear. Here, we examined the regulation of mesocotyl and coleoptile growth by characterizing a gaoyao1 (gy1) mutant that exhibits a longer mesocotyl and longer coleoptile than its original variety of rice. GY1 was identified through map-based cloning and encodes a PLA1-type phospholipase that localizes in chloroplasts. GY1 functions at the initial step of jasmonic acid (JA) biosynthesis to repress mesocotyl and coleoptile elongation in etiolated rice seedlings. Ethylene inhibits the expression of GY1 and other genes in the JA biosynthesis pathway to reduce JA levels and enhance mesocotyl and coleoptile growth by promoting cell elongation. Genetically, GY1 acts downstream of the OsEIN2-mediated ethylene signaling pathway to regulate mesocotyl/coleoptile growth. Through analysis of the resequencing data from 3000 rice accessions, we identified a single natural variation of the GY1 gene, GY1376T, which contributes to mesocotyl elongation in rice varieties. Our study reveals novel insights into the regulatory mechanism of mesocotyl/coleoptile elongation and should have practical applications in rice breeding programs.

引用

页码：1053 / 1072

页数：20

共 86 条

[81] Jasmonate-Activated MYC2 Represses ETHYLENE INSENSITIVE3 Activity to Antagonize Ethylene-Promoted Apical Hook Formation in Arabidopsis [J].