Ethylene inhibits rice root elongation in compacted soil via ABA- and auxin-mediated mechanisms

被引：70

作者：

Huang, Guoqiang ^{[1
]}

Kilic, Azad ^{[2
]}

Karady, Michal ^{[3
,4
]}

Zhang, Jiao ^{[1
]}

Mehra, Poonam ^{[2
]}

Song, Xiaoyun ^{[1
]}

Sturrock, Craig J. ^{[2
]}

Zhu, Wanwan ^{[1
]}

Qin, Hua ^{[5
]}

Hartman, Sjon ^{[6
,7
]}

Schneider, Hannah M. ^{[8
]}

Bhosale, Rahul ^{[2
]}

Dodd, Ian C. ^{[9
]}

Sharp, Robert E. ^{[10
]}

Huang, Rongfeng ^{[5
]}

Mooney, Sacha J. ^{[2
]}

Liang, Wanqi ^{[1
]}

Bennett, Malcolm J. ^{[2
]}

Zhang, Dabing ^{[1
,11
]}

Pandey, Bipin K. ^{[2
]}

机构：

[1] Shanghai Jiao Tong Univ, SJTU Univ Adelaide Joint Ctr Agr & Hlth, Sch Life Sci & Biotechnol, Joint Int Res Lab Metab & Amp Dev Sci,State Key L, Shanghai, Peoples R China

[2] Univ Nottingham, Future Food Beacon & Sch Biosci, Nottingham LE12 5RD, England

[3] Palacky Univ, Lab Growth Regulators, Inst Expt Bot, Czech Acad Sci, CZ-78371 Olomouc, Czech Republic

[4] Palacky Univ, Fac Sci, CZ-78371 Olomouc, Czech Republic

[5] Chinese Acad Agr Sci, Biotechnol Res Inst, Beijing 100081, Peoples R China

[6] Univ Freiburg, Fac Biol, Plant Environm Signalling & Dev, D-79104 Freiburg, Germany

[7] Univ Freiburg, CIBSS Ctr Integrat Biol Signalling Studies, D-79104 Freiburg, Germany

[8] Wageningen Univ & Res, Ctr Crop Syst Anal, Wageningen, Netherlands

[9] Univ Lancaster, Lancaster Environm Ctr, Lancaster, England

[10] Univ Missouri, Div Plant Sci & Technol & Interdisciplinary Plant, Columbia, MO 65211 USA

[11] Univ Adelaide, Sch Agr Food & Wine, Waite Campus, Urrbrae, SA, Australia

来源：

PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA | 2022年 / 119卷 / 30期

基金：

英国生物技术与生命科学研究理事会; 美国国家科学基金会; 欧洲研究理事会; 中国国家自然科学基金;

关键词：

roots; soil compaction; ethylene; auxin; ABA; GROWTH; GENE; BIOSYNTHESIS; RESPONSES; SEEDLINGS; MUTANTS; BARLEY;

D O I：

10.1073/pnas.2201072119

中图分类号：

O [数理科学和化学]; P [天文学、地球科学]; Q [生物科学]; N [自然科学总论];

学科分类号：

07 ; 0710 ; 09 ;

摘要：

Soil compaction represents a major agronomic challenge, inhibiting root elongation and impacting crop yields. Roots use ethylene to sense soil compaction as the restricted air space causes this gaseous signal to accumulate around root tips. Ethylene inhibits root elongation and promotes radial expansion in compacted soil, but its mechanistic basis remains unclear. Here, we report that ethylene promotes abscisic acid (ABA) biosynthesis and cortical cell radial expansion. Rice mutants of ABA biosynthetic genes had attenuated cortical cell radial expansion in compacted soil, leading to better penetration. Soil compaction-induced ethylene also up-regulates the auxin biosynthesis gene OsYUC8. Mutants lacking OsYUC8 are better able to penetrate compacted soil. The auxin influx transporter OsAUX1 is also required to mobilize auxin from the root tip to the elongation zone during a root compaction response. Moreover, osaux1 mutants penetrate compacted soil better than the wild-type roots and do not exhibit cortical cell radial expansion. We conclude that ethylene uses auxin and ABA as downstream signals to modify rice root cell elongation and radial expansion, causing root tips to swell and reducing their ability to penetrate compacted soil.

引用

页数：10

共 37 条

[1] Screening of the rice viviparous mutants generated by endogenous retrotransposon Tos17 insertion.: Tagging of a zeaxanthin epoxidase gene and a novel OsTATC gene [J].