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Author Zhu C., Yang X., Chen W., Xia X., Zhang Z., Qing D., Nong B., Li J., Liang S., Luo S., Zhou W., Yan Y., Dai G., Li D., Deng G.
Title WD40 protein OsTTG1 promotes anthocyanin accumulation and CBF transcription factor-dependent pathways for rice cold tolerance.
Abstract:
Temperature is a critical abiotic factor affecting rice (Oryza sativa L.) yields, and cold stress at the seedling stage can inhibit plant growth or even be fatal. Antioxidants such as anthocyanins accumulate in a variety of plants during cold stress, but the underlying mechanisms are not well understood. Here, we report that rice TRANSPARENT TESTA GLABRA 1 (OsTTG1), a major regulator of anthocyanin biosynthesis in rice, responds to short- and long-term cold stress at both the transcriptional and protein levels. Metabolomic and transcriptomic data indicate that OsTTG1 activates the expression of anthocyanidin synthase (OsANS) genes under cold stress. Our data also suggest that OsTTG1 forms a MYB-bHLH-WD (MBW) complex with Basic helix-loop-helix 148 (OsbHLH148) and Myb-related S3 (OsMYBS3), and this complex activates the expression of Dehydration-responsive element-binding protein 1 (OsDREB1) and OsANS genes. Together, our findings reveal the mechanisms by which OsTTG1 coordinates both anthocyanin biosynthesis and the expression of cold-responsive genes in colored rice, providing genetic resources for future cold resistance breeding in rice.
Journal Plant Physiol.
Country China
Volume 197(1)
Pages
Year 2024
PubMed ID 39589910
PubMed Central ID -
DOI 10.1093/plphys/kiae604
URL -
Relation
Gene ANS ANS2 BHLH148 DREB1A DREB1B DREB1C DREB1E MYBS3 TTG1A
INSD -
Strain Wild Core Collection -
Induced Mutation Lines(NIG Collection) -
Sterile Seed Strain -
Lethal Embryo
Mutantion Strain 		-
Stages in Each Organ
- Muant Lines (Gene) 		-
Cultivated Varieties(NIG Collection) -
Stages in Each Organ -
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