Progress in the study of transformation mechanism from mitosis to meiosis
Release date: 2018-01-03
The Tang Weihua Research Group of the Institute of Plant Physiology and Ecology, Shanghai Institutes for Biological Sciences, Chinese Academy of Sciences has made progress in the molecular mechanism of plant germ cell line transition from mitosis to meiosis.
Sexual reproduction is the most important form of reproduction in nature. An important hallmark of the transformation of an organism from asexual reproduction to sexual reproduction is the production of germ cells through meiosis. In order to ensure the normal conduct of sexual reproduction, sporogenous cells that have accepted the fate of germ cells need to convert the cell division cycle from mitosis to meiosis at a specific time. The initiation of meiosis is a complex signaling process with different mechanisms of meiosis initiation in yeast and mammals, and the current research on how plants achieve the transition from mitosis to meiosis is unclear.
Tang Weihua's research group based on the fine analysis of the development period of corn anthers, using laser microdissection and chip hybridization, respectively, to obtain mitotic cells in the mitosis, in the meiotic interphase of pollen mother cells (enlarging PMC), just Entering meiotic pollen mother cells and adjacent tapetum cells, as well as period-specific expression profiles of mature pollen, maize seedlings and stem parenchyma cells. Analysis of the expression characteristics of transcription factors and ubiquitin ligases at different developmental stages indicates that enlarging PMC is at a critical turning point from mitosis to meiosis. Combined with protein profiling, it was found that meiosis-related genes not only transcribe early before entering the meiotic phase, but also produce proteins in advance. On this basis, the research group put forward a series of scientific hypotheses that can be tested in the process of mitosis to meiosis conversion, specific expression of genes, enriched metabolic pathways, transcriptional regulatory factors, etc., in order to further understand corn reduction. The initial mechanism of number splitting.
The relevant research results are based on the Stage-specific gene profiling of germinal cells help delineate the mitosis/meiosis transition, published in Plant Physiology. The research was funded by national key research and development projects, the National Natural Science Foundation of China, and the Chinese Academy of Sciences.
Source: Shanghai Academy of Health Sciences
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