Mn venom reduces the growth of the main root of athropomorphic mustard by reducing cell division in the sub-region.

Mn poisoning inhibits the growth of the main root and the development of the side root, but the physiological and molecular structure is not completely clear.
Under the guidance of his mentor and researcher Xu Jin, Zhao Jingjing, a graduate student of the Horticultural Plant Breeding Research Group of Xishuangbana Tropical Botanical Garden of the Chinese Academy of Sciences, studied the physiological and molecular mechanisms of Mn poison control plant root development by means of plant physiology, pharmacology, genetics and molecular biology.
results show that Mn poisoning reduces the growth of the main root by reducing cell division in the sub-region.
Mn poison also inhibits the expression of genes associated with growth hormone synthesis, reduces the level of PIN4 and PIN7 proteins at the root tip, thereby reducing the content of root tip growth hormone, thereby inhibiting the growth of the main root.
Mn poison can also cause oxidative damage to the root system by regulating the level of ROS.
further studies have also found that Mn poisons can affect plant absorption and assimulation of nutrients such as P and S by regulating the expression of several miRNAs.
Mn poison inhibits the growth of the main root by growth hormone.
(A:CYCB1; 1-GUS staining; B:DII-VENUS fluorescence; C: PIN4-GFP fluorescence; D:PIN7-GFP fluorescence) Part of the study was published in Frontiers in Plant Science.
the study was supported by projects such as the National Natural Science Foundation of China (31272239), the National Key Research and Development Program (2016 YFC0501901) and the Yunnan Provincial Young and Middle-aged Academic Leader Reserve Talent (2014HB043).
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