VOZ1 and VOZ2 transcription factors regulate arsenic tolerance and distribution in rice and Arabidopsis

Frontiers in Plant Science

Plant Science

Do-Young Kim¹  Ying Wen²  Jie Zhang²  Ting Pan²  Jiayou Liu²  Won-Yong Song³  Chayanee Chairattanawat⁴  Jong-Seong Jeon⁵  Kieu Thi Xuan Vo⁵  Enrico Martinoia⁶  Chun-Yan Zhong⁷  Mao-Hui Wang⁷ 

[1] Advanced Bio-convergence Center, Pohang Technopark, Pohang, Republic of Korea;Department of Horticulture, Foshan University, Foshan, Guangdong, China;Department of Horticulture, Foshan University, Foshan, Guangdong, China;Department of Integrative Bioscience and Biotechnology, Pohang University of Science and Technology, Pohang, Republic of Korea;Department of Integrative Bioscience and Biotechnology, Pohang University of Science and Technology, Pohang, Republic of Korea;Graduate School of Green-Bio Science and Crop Biotech Institute, Kyung Hee University, Yongin, Republic of Korea;Institute of Plant Biology, University Zurich, Zurich, Switzerland;Zhaoqing Institute of Agricultural Sciences, Zhaoqing, China;

关键词: arsenic;    arsenic tolerance rice genes;    phloem;    rice;    seed;    zinc finger-type transcription factor;   

DOI  :  10.3389/fpls.2023.1209860

 received in 2023-04-21, accepted in 2023-08-23,  发布年份 2023

来源: Frontiers

【 摘 要 】

Rice is the major source of arsenic (As) intake in humans, as this staple crop readily accumulates As in the grain. Identifying the genes and molecular mechanisms underlying As accumulation and tolerance is a crucial step toward developing rice with reduced As levels. We identified 25 rice genes that improve As tolerance in yeast cells by expressing a complementary DNA (cDNA) library generated from As-treated rice roots. Among them, a zinc finger–type transcription factor VASCULAR PLANT ONE- ZINC FINGER 1 (OsVOZ1) (OsVOZ1) conferred the most pronounced As tolerance. OsVOZ1 inhibits As accumulation in yeast via activation of As efflux transporter Acr3p by post-transcriptional modification in yeast. The Arabidopsis voz1 voz2 double-knockout mutant exhibited As hypersensitivity, altered As concentrations in various tissues, and reduced As transport activity via the phloem. Arabidopsis and rice VOZs were highly expressed in phloem cells in various tissues, which are critical for As distribution in plant tissues. The double-knockdown and single-knockout plants of OsVOZ1 and OsVOZ2 reduced As accumulation in their seeds. These findings suggest that rice and Arabidopsis VOZs regulate the translocation of As into tissues by regulating the phloem loading of this element.

【 授权许可】

Unknown   
Copyright © 2023 Wen, Chairattanawat, Vo, Liu, Zhang, Pan, Kim, Martinoia, Zhong, Wang, Jeon and Song