Functional Interconnections of HY1 with MYC2 and HY5 in Arabidopsis Seedling Development

Overview

Journal BMC Plant Biol

Publisher Biomed Central

Specialty Biology

Date 2012 Mar 20

PMID 22424472

Citations 13

Authors

Babu Rajendra V Prasad

Selva V Kumar

Ashis Nandi

Sudip Chattopadhyay

Affiliations

Soon will be listed here.

Abstract

Arabidopsis seedling development is controlled by many regulatory genes involved in multiple signaling pathways. The functional relationships of these genes working in multiple signaling cascades have started to be unraveled. Arabidopsis HY1/HO1 is a rate-limiting enzyme involved in biosynthesis of phytochrome chromophore. HY5 (a bZIP protein) promotes photomorphogenesis, however ZBF1/MYC2 (a bHLH protein) works as a negative regulator of photomorphogenic growth and light regulated gene expression. Further, MYC2 and HY1 have been shown to play important roles in jasmonic acid (JA) signaling pathways. Here, we show the genetic interactions of HY1 with two key transcription factor genes of light signaling, HY5 and MYC2, in Arabidopsis seedling development. Our studies reveal that although HY1 acts in an additive manner with HY5, it is epistatic to MYC2 in light-mediated seedling growth and gene expression. This study further demonstrates that HY1 additively or synergistically functions with HY5, however it works upstream to MYC2 in JA signaling pathways. Taken together, this study demonstrates the functional interrelations of HY1, MYC2 and HY5 in light and JA signaling pathways.

Citing Articles

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A microbiota-root-shoot circuit favours Arabidopsis growth over defence under suboptimal light.

Hou S, Thiergart T, Vannier N, Mesny F, Ziegler J, Pickel B Nat Plants. 2021; 7(8):1078-1092.

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Beyond Light: Insights Into the Role of Constitutively Photomorphogenic1 in Plant Hormonal Signaling.

Wang W, Chen Q, Botella J, Guo S Front Plant Sci. 2019; 10:557.

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OsbZIP48, a HY5 Transcription Factor Ortholog, Exerts Pleiotropic Effects in Light-Regulated Development.

Burman N, Bhatnagar A, Khurana J Plant Physiol. 2017; 176(2):1262-1285.

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