The study of molecular mechanisms for the maintenance and differentiation of plant hormone regulation flower-splitting tissues has progressed.

In higher plants, all the tissues and organs of the plant body developafter are derived from the sub-tissues at all levels.
the generation and maintenance of the floral meristem (FM) is a prerequisite for the production and development of flower organs, while cell differentiation caused by the end of FM activity is a guarantee of subsequent reproductive growth and generational alternating, which can guarantee crop yield in practical application. the maintenance and differentiation of
sub-biotication tissue swelled by specific protein components such as transcription factors, peptide signals and receptors and plant hormones such as growth hormone and cytodivision, but there was no systematic study of the mechanisms of inter-plant hormoneand inter-protein inter-protein regulation FM maintenance and differentiation.
Liu Xigang Research Group of the Institute of Genetics and Developmental Biology of the Chinese Academy of Sciences, using molecular and cell biology, genetics and biochemical analysis in combination with bioinformatics, systematically studied the growth hormone AUXIN RESPONSE FACTOR3 (ARF3) mediated growth hormone and transcription factor AGAMOUS (AG) to regulate cell split activity and then regulate the molecular mechanism of FM differentiation.
studies show that the internal stability of cytodividedins is very important for the maintenance and differentiation of FM.
growth hormone can inhibit the activity of cytodividedin by promoting the expression of ARF3, thereby promoting FM differentiation.
in this process, ARF3 can directly inhibit the expression of the synthetic gene IPT3/5/7 of cytodividerin, and indirectly inhibit the expression of the synthetic gene LOG family gene, resulting in a decrease in the content of cytosin.
at the separation tissue center (organizing center, OC), ARF3 can directly inhibit the expression of the cell divider receptor AHK4, thereby reducing the activity of the OC region cytosin, resulting in the end of the programming of stem cell activity to maintain the expression of the gene WUSCHEL.
at the same time, the transcription factor AG, which plays a key role in the decision of flower organs and FM differentiation, has dynamic regulation of the expression of ARF3, in the 3-4 stage of flower development, AG maintains the activity of cell divider, promotes the expression of cell cycle gene, ensures cell division to ensure the maintenance of the dyslegenic tissue and the production of flower organs, in the 5-6 stage of flower development, AG and growth hormone together to promote the expression of ARF3. The findings were published online January 25,
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research has been supported by the National Natural Science Foundation of China, the National Key Research and Development Program, the National Key Basic Research and Development Program and the "100-person Program" of the Chinese Academy of Sciences, as well as key laboratories for plant cell and chromosomal engineering.
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