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MOS1 Negatively Regulates Sugar Responses and Anthocyanin Biosynthesis in Arabidopsis.

Abstract：

:Sugars, which are important signaling molecules, regulate diverse biological processes in plants. However, the convergent regulatory mechanisms governing these physiological activities have not been fully elucidated. MODIFIER OF snc1-1 (MOS1), a modulator of plant immunity, also regulates floral transition, cell cycle control, and other biological processes. However, there was no evidence of whether this protein was involved in sugar responses. In this study, we found that the loss-of-function mutant mos1-6 (mos1) was hypersensitive to sugar and was characterized by defective germination and shortened roots when grown on high-sugar medium. The expression of MOS1 was enhanced by sucrose. Hexokinase 1, an important gene involved in sugar signaling, was upregulated in the mos1 mutant compared to wild-type Col-0 in response to sugar. Furthermore, the mos1 mutant accumulated more anthocyanin than did wild-type Col-0 when grown on high-sugar concentration medium or under high light. MOS1 was found to regulate the expression of flavonoid and anthocyanin biosynthetic genes in response to exogenous sucrose and high-light stress but with different underlying mechanisms, showing multiple functions in addition to immunity regulation in plant development. Our results suggest that the immune regulator MOS1 serves as a coordinator in the regulatory network, governing immunity and other physiological processes.

journal_name

Int J Mol Sci

journal_title

International journal of molecular sciences

authors

Zhang N,Wang M,Huang J,Yang L,Wang Z,Wu D,Shu X

doi

10.3390/ijms21197095

subject

Has Abstract

pub_date

2020-09-26 00:00:00

issue

19

issn

1422-0067

pii

ijms21197095

journal_volume

21

pub_type

杂志文章

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