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Plant biogenesis cells (meristemoid cells) are a class of cells that are stem cell active and are distributed among cells such as differentiated and expanded leaf epidermis.
about half of the epidermal cells in the leaves of the amoeba are derived from the phystogenesis cells, so the proliferation of the physic cells has an important effect on the size of the leaf.
at present, the molecular mechanism of the proposed cell to regulate the size of plant organs is not known.
In the early study, Li Yunhai Research Group of the Institute of Genetics and Developmental Biology of the Chinese Academy of Sciences, in collaboration with Wang Yingchun Research Group and The Dirk Inze Research Group of Belgium, found an important mechanism for controlling the proliferation of the ethogenous cells and organ size by regulating the stability of PPD.
study, a collaboration between Li Yunhai Research Group, Dirk Inze Research Group of Belgium and Zhu Zhengge Research Group of Hebei Normal University revealed the molecular mechanism by which SAP controls organ size by regulating the stability of a transcription-suppressing complex.
two new SAP substrates, KIX8 and KIX9, were discovered by screening SAP's mutual protein.
KIX8 and KIX9 can mediate the interaction between PPD and transcription inhibitor TOPLESS (TPL), and control the proliferation and leaf size of the phystodes by regulating the transcription of downstream genes.
SAP interacts directly with KIX8 and KIX9 and regulates their protein stability. Further research
found that SAP and KIX8, KIX9, PPD2 act in the same genetic pathway to regulate the proliferation of bio-cells and organ size.
this study reveals a new mechanism for SAP to control the proliferation and organ size of the proposed secondary cell by regulating the stability of the PPD-KIX-TPL transcription inhibitor complex, which will provide theoretical basis and genetic resources for high-yield breeding. The findings were published online February 5,
in PLoS Genetics. Li Na, an associate researcher in the
Li Yunhai Research Group, and Liu Zupei, a doctoral student, are co-authors of the paper, and researcher Li Yunhai is the communication author.
research has been supported by the National Natural Science Foundation of China and the Chinese Academy of Sciences' Strategic Leading Science and Technology Special (B).
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