β-Cyclocitral is a conserved root growth regulator

被引：111

作者：

Dickinson, Alexandra J. ^{[1
,2
,3
]}

Lehner, Kevin ^{[1
]}

Mi, Jianing ^{[4
]}

Jia, Kun-Peng ^{[4
]}

Mijar, Medhavinee ^{[1
,2
]}

Dinneny, Jose ^{[3
,5
]}

Al-Babili, Salim ^{[4
]}

Benfey, Philip N. ^{[1
,2
]}

机构：

[1] Duke Univ, Dept Biol, Durham, NC 27708 USA

[2] Duke Univ, Howard Hughes Med Inst, Durham, NC 27708 USA

[3] Carnegie Inst Sci, Dept Plant Biol, 290 Panama St, Stanford, CA 94305 USA

[4] King Abdullah Univ Sci & Technol, Biol & Environm Sci & Engn Div, Bioact Lab, Thuwal 239556900, Saudi Arabia

[5] Stanford Univ, Dept Biol, Stanford, CA 94305 USA

来源：

PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA | 2019年 / 116卷 / 21期

关键词：

carotenoid; plant hormone; abiotic stress; meristem; lateral root emergence; GENE-EXPRESSION; VOLATILE CONSTITUENTS; PLANT-GROWTH; ARABIDOPSIS; SHOOT;

D O I：

10.1073/pnas.1821445116

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：

Natural compounds capable of increasing root depth and branching are desirable tools for enhancing stress tolerance in crops. We devised a sensitized screen to identify natural metabolites capable of regulating root traits in Arabidopsis. beta-Cyclocitral, an endogenous root compound, was found to promote cell divisions in root meristems and stimulate lateral root branching. beta-Cyclocitral rescued meristematic cell divisions in ccd1ccd4 biosynthesis mutants, and beta-cyclocitral-driven root growth was found to be independent of auxin, brassinosteroid, and reactive oxygen species signaling pathways. beta-Cyclocitral had a conserved effect on root growth in tomato and rice and generated significantly more compact crown root systems in rice. Moreover, beta-cyclocitral treatment enhanced plant vigor in rice plants exposed to salt-contaminated soil. These results indicate that beta-cyclocitral is a broadly effective root growth promoter in both monocots and eudicots and could be a valuable tool to enhance crop vigor under environmental stress.

引用

页码：10563 / 10567

页数：5

共 33 条

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