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One of the commonly used herbal licorice has important medicinal value, ecological value and industrial value, mainly distributed in the three northern regions and the central and eastern part of the region, after years of excessive and indiscriminate digging of wild licorice serious shortage of resources, and artificial planting process for the pursuit of economic interests, extensive use of fertilizers, pesticides, serious pollution of the environment, reducing the quality of licorice. In recent years, AM fungi as a biological fertilizer in agriculture has been used widely, and proved to plants grown under stress conditions have a significant role in promoting. Therefore, the study of the relationship between AM fungi and licorice, especially under adverse conditions of AM fungi on the growth and physiological characteristics of licorice role in promoting and expanding the use of mycorrhizal preparations scale cultivated licorice, licorice resources to improve the quality, protect the ecological environment has significance. In this experiment, Glycyrrhiza as material conditions in the greenhouse soil culture was studied under drought and salt stress of AM fungi on the growth and physiological characteristics of licorice impact achieved the following main results: 1 AM fungi under drought stress significantly improve licorice mycorrhizal infection rate, mycorrhizal colonization was significantly promote plant for nitrogen, phosphorus and water absorption, improved plant nitrogen, phosphorus and flavonoids, improved plant nutrition, improve drought resistance, while increasing the licorice quality of root effect is more remarkable, drought stress and AM fungi on licorice quality have significant interaction effects on biomass and external morphology had no significant effect; AM fungi through the coordination of added protection activity and Osmoregulator significantly reduced MDA content, indicating lipid peroxidation of cell injury was significantly reduced as a result of drought stress inoculation with AM fungi significantly promoted the growth of licorice, licorice improved drought tolerance, soil moisture 60% of AM fungi on the most significant effect of licorice, licorice best growth. 2 salt stress inhibited fungal infection on the licorice, AM fungi significantly increased mycorrhizal infection rate, mycorrhizal infection changes the host root morphology, increased absorption of water and nutrients licorice ability to improve host plants on soil absorption of P elements, etc., significantly promote plant growth, increased biomass quality and licorice. AM fungi significantly promote the penetration of material synthesis and accumulation, increased leaf water retention capacity and significantly alleviated the salt stress induced physiological drought, enhance cellular absorption capacity to maintain a stable internal environment; stimulate flavonoid antioxidant substances generated, reducing the content of MDA, reducing salt stress peroxide systematic destruction of cell membranes, promoting the growth of licorice, licorice enhanced salt tolerance. Salt concentration from 0 to 0.1% of AM fungi on the most significant effect of licorice, licorice best growth.
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