Volume 14, No 1, Feb 2004

ISSN: 1001-0602 
EISSN: 1748-7838 2018 
impact factor 17.848* 
(Clarivate Analytics, 2019)

Volume 14 Issue 1, February 2004: 8-15

ORIGINAL ARTICLES

Arabidopsis RAV1 is down-regulated by brassinosteroid and may act as a negative regulator during plant development

Yu Xin HU*, Yong Hong WANG*, Xin Fang LIU, Jia Yang LI

Institute of Genetics and Developmental Biology, Chinese Academy of Sciences, Beijing 100101, China. Correspondence: Jia Yang LI(jyli@genetics.ac.cn)

RAV1 is a novel DNA-binding protein with two distinct DNA-binding domains unique in higher plants, but its role in plant growth and development remains unknown. Using cDNA array, we found that transcription of RAV1 is down-regulated by epibrassinolide (epiBL) in Arabidopsis suspension cells. RNA gel blot analysis revealed that epiBL-regulated RAV1 transcription involves neither protein phosphorylation/dephosphorylation nor newly synthesized protein, and does not require the functional BRI1, suggesting that this regulation might be through a new BR signaling pathway. Overexpressing RAV1 in Arabidopsis results in a retardation of lateral root and rosette leaf development, and the underexpression causes an earlier flowering phenotype, implying that RAV1 may function as a negative regulatory component of growth and development.

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