Regulatory Networks Acted Upon by the GID1-DELLA System After Perceiving Gibberellin

The Enzymes
Hideki YoshidaMakoto Matsuoka

Abstract

Recent studies have revealed that DELLA proteins (DELLAs) interact with various kinds of transcription factors (TFs) and other kinds of proteins to regulate GA signaling. Here, we enumerate some of these DELLA interactors to show the multiple functions of DELLAs in the GA signaling pathway. Through interaction with TFs, DELLAs regulate the expression of many genes in an inhibitory or enhancing manner under various biological events including the crosstalk between GA and other phytohormones, and the development of organs and tissues. DELLA-interacting TFs can be categorized into two types in terms of the effect of DELLA on their transacting activity. The first group includes those that are inhibited by DELLAs in terms of their DNA-binding activity, which includes the phytochrome interacting factor family of proteins involved in hypocotyl elongation, chlorophyll biosynthesis, fruit patterning, and cotyledon expansion; squamosa promoter binding-like proteins involved in floral transition; ethylene insensitive 3 and EIN3-like 1 proteins involved in GA-ethylene crosstalk; brassinazole-resistant 1 involved in GA-brassinosteroid crosstalk; and jasmonate ZIM domain and MYC2 proteins involved in GA-jasmonate crosstalk. The second group ...Continue Reading

Citations

Oct 14, 2020·Plant & Cell Physiology·Hideki YoshidaMakoto Matsuoka

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