The Versatile Functions of OsALDH2B1 Provide a Genic Basis for Growth-defense Trade-offs in Rice

Overview

Journal Proc Natl Acad Sci U S A

Specialty Science

Date 2020 Feb 7

PMID 32024752

Citations 33

Authors

Yinggen Ke

Meng Yuan

Hongbo Liu

Shugang Hui

Xiaofeng Qin

Jie Chen

Qinglu Zhang

Xianghua Li

Jinghua Xiao

Qifa Zhang

Shiping Wang

Affiliations

Soon will be listed here.

Abstract

In plants, enhanced defense often compromises growth and development, which is regarded as trade-offs between growth and defense. Here we identified a gene, , that functions as a master regulator of the growth-defense trade-off in rice. OsALDH2B1 has its primary function as an aldehyde dehydrogenase and a moonlight function as a transcriptional regulator. Loss of function of greatly enhanced resistance to broad-spectrum pathogens, including fungal blast, bacterial leaf blight, and leaf streak, but caused severe phenotypic changes such as male sterility and reduced plant size, grain size, and number. We showed that its primary function as a mitochondrial aldehyde dehydrogenase conditions male fertility. Its moonlight function of transcriptional regulation, featuring both repressing and activating activities, regulates a diverse range of biological processes involving brassinolide, G protein, jasmonic acid, and salicylic acid signaling pathways. Such regulations cause large impacts on the morphology and immunity of rice plants. The versatile functions of OsALDH2B1 provide an example of the genic basis of growth-defense trade-offs in plants.

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