[논문]Calcium dependent sucrose uptake links sugar signaling to anthocyanin biosynthesis in Arabidopsis

Shin, D.H.; Choi, M.G.; Lee, H.K.; Cho, M.; Choi, S.B.; Choi, G.; Park, Y.I.

doi:10.1016/j.bbrc.2012.11.100

Calcium dependent sucrose uptake links sugar signaling to anthocyanin biosynthesis in Arabidopsis

Biochemical and biophysical research communications, v.430 no.2, 2013년, pp.634 - 639

Shin, D.H. , Choi, M.G. , Lee, H.K. , Cho, M. , Choi, S.B. , Choi, G. , Park, Y.I.

Abstract ▼ AI-Helper

Sugars enhance light signaling-induced anthocyanin accumulation in Arabidopsis seedlings via differential regulation of several positive and negative transcription factors. Ca2+ plays a role as a second messenger in sugar signaling in grape and wheat. However, whether anthocyanin pigmentation is modulated by changes in intracellular Ca2+ level in Arabidopsis is not known. Here, we used a pharmaceutical approach that Ca2+ antagonists strongly interfered with sucrose uptake and anthocyanin accumulation by downregulating the expression of sucrose transporter 1 (SUC1) and transcriptional regulatory factors, such as PAP1. Time course analysis of the effect of Ca2+ antagonists showed the early inhibition of sucrose-induced sugar uptake leading to decreased anthocyanin accumulation, indicating that Ca2+ signals play a role in sugar uptake rather than in anthocyanin biosynthesis. An early increase in cytosolic Ca2+ level in Arabidopsis roots in response to sucrose feeding was significantly inhibited by Ca2+ antagonists. Taken together, these results indicate that sucrose-induced sugar uptake in Arabidopsis is modulated by changes in endogenous Ca2+ levels, which in turn regulate anthocyanin accumulation.

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참고문헌 (31)

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Calcium dependent sucrose uptake links sugar signaling to anthocyanin biosynthesis in Arabidopsis

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Calcium dependent sucrose uptake links sugar signaling to anthocyanin biosynthesis in Arabidopsis

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