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[49]
[4]
与内生菌密切相关 。Ancheeva 等 指出,内生菌相当 Endophytic bacteria isolated from Solanum nigrum L.,al-
于一个取之不尽、用之不竭的天然化合物生产库。因 leviate cadmium(Cd)stress response by their antioxidant
此,从药用植物内生菌的次级代谢产物中筛选新的活性 potentials,including SOD synthesis by sodA gene[J]. Eco-
成分和先导化合物是一个发现新型化合物和有价值天 toxicol Environ Saf,2019,174:197-207.
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目前,植物内生菌次级代谢产物的研究方法一般是
939-948.
基于菌种培养及天然产物分离纯化的策略,然而内生菌
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脱离宿主以后生长很慢,再发酵时合成代谢物的能力很 mediated modulation of defense-related genes and syste-
弱,且在传数代后会发生变异,导致次级代谢产物的变 mic resistance in withania somnifera(L.)dunal under al-
化,给研究带来很大的困难 。而且,植物中同时存在 ternaria alternata stress[J]. Appl Environ Microbiol,2018,
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生菌次生代谢产物的产生潜能有影响,内生菌中存在与 ane production by taxomyces andreanae,an endophytic
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宿主无关的生物合成机制的证据也仍然不充分 。 fungus of pacific yew[J]. Science,1993,260(5105):214-
综上所述,内生菌可从寄主植物中吸取营养并通过 216.
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还具有许多新的生物活性,故药用植物内生菌的次级代
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谢产物是庞大的潜在药用物质资源库,具有良好的开发
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前景。然而,目前内生菌离开宿主植物后的培养问题极
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大地限制了其次级代谢产物的开发,还需要进一步的研
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中国药房 2021年第32卷第7期 China Pharmacy 2021 Vol. 32 No. 7 ·883 ·