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综述了菌根真菌对有机氮的吸收利用在植物生理学、分子水平及实验装置方面国内外近年来取得的一些研究成果.菌根真菌吸收有机氮后能向宿主植物转运,其中丛枝菌根真菌吸收氨基氮后在根外菌丝中合成载体———精氨酸(Arg),它既能在根外菌丝(ERM)和根内菌丝(IRM)间双向运转,又能在根内菌丝中经尿素循环分解成NH4+,作为氮源整合入根内菌丝中的其他氨基酸或通过NH4+-转运蛋白转运给宿主植物.已经从菌根真菌中克隆出或检测到表达一些与氮代谢相关的基因.与研究需求相适应的实验装置也在不断发展.
In this paper, some researches on the uptake and utilization of organic nitrogen by mycorrhizal fungi in plant physiology, molecular level and experimental facilities are reviewed in recent years. Mycorrhizal fungi, after absorbing organic nitrogen, can transport to host plants, among which arbuscular mycorrhizal fungi Arginine (Arg), a carrier of extracellular rhizome, was synthesized after amino nitrogen was absorbed. It can not only operate in both directions between the extracellular mycelium (ERM) and the root mycelium (IRM) Mycelium is decomposed into NH4 + by urea cycle, other amino acids incorporated into the root mycelium as a nitrogen source, or transported to host plants by NH4 + -reporters Some proteins that have been cloned or detected from mycorrhizal fungi have been cloned, Related Genes. Experimental devices adapted to the research needs are also evolving.