Multiplicity of signals and diversity of signaling pathways exist during the establishment of mycorrhizal associations together with the regulation of symbiosis - specific genes expression . this mechanism of signal recognition and transduction related with development process of the symbiont was reviewed at the molecular level 在菌根共生体建立过程中存在信号分子的多重性和信号通路的多样性以及共牛体特异基因的表达调控,从分子水平上揭示了菌根整个发育过程。
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The blastn results show that gyn - 15 is closely related to a symbiont of anemones , s . californium , and the free - living strain , gymnodinium varians . sequence comparison show that the similarities among each part of the sequences from these three strains are all above 99 % . phylogenetic reconstruction with neighbor - joining ( nj ) method using sequences of variable regions ( v1 + v2 + v3 ) of ssu rdna indicated that gyn - 15 , s . californium and g . varians form a new clade with 100 % bootstrap support 以ssurdna序列中的三个可变区( vz + vz + v3 )和邻接法困eighbor一joiningmethod ， nj法)构建共生甲藻属的系统进化树表明， gyn一巧与5 . cal扣rnium和g . varian :在共生甲藻属内构成一个独立的、自检支持百分率为100 %的子类群( clade ) ，根据这些结果可将gyn一巧初步鉴定为属于共生甲藻属。
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This paper concerns studies on rhizobia in symbiosis with important legume soybean and peanut crops in china , following : 1 ) summarized bio - diversity of rhizobia , including indigeneous population , isolation frequency , strain type , distribution , and strain - host promiscuity and compatibility from large and small samples . 2 ) reviewed symbiont improvement in both sides of rhizobia and hosts , involving selection of effective rhizobial strains , evoluation and utilization of the host germplasm for symbiotic properties , and selection of the both sides for special characters . 3 ) discussed the subject on the rich symbiont germplasm resource in china and on further research being necessary to exploitation and utilization of the benificial germplasm 针对我国主要豆科作物大豆和花生的研究成果，并结合本身研究工作内容， ( 1 )总结了与宿主共生的根瘤菌生物学多样性，包括大、小样本的土著根瘤菌群体数量、分离频率、类型与分布及其菌株宿主共生混交性与亲和性； ( 2 )评述了根瘤菌宿主植物共生体双边固氮改良，包括优良菌株的选育、宿主品种资源共生特性的评价与利用及特异性状的选择； ( 3 )讨论了我国这一类共生体资源的丰富性以及有必要进一步加大力度研究有益资源的开发和利用的问题。
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Abstract : this paper concerns studies on rhizobia in symbiosis with important legume soybean and peanut crops in china , following : 1 ) summarized bio - diversity of rhizobia , including indigeneous population , isolation frequency , strain type , distribution , and strain - host promiscuity and compatibility from large and small samples . 2 ) reviewed symbiont improvement in both sides of rhizobia and hosts , involving selection of effective rhizobial strains , evoluation and utilization of the host germplasm for symbiotic properties , and selection of the both sides for special characters . 3 ) discussed the subject on the rich symbiont germplasm resource in china and on further research being necessary to exploitation and utilization of the benificial germplasm 文摘:针对我国主要豆科作物大豆和花生的研究成果，并结合本身研究工作内容， ( 1 )总结了与宿主共生的根瘤菌生物学多样性，包括大、小样本的土著根瘤菌群体数量、分离频率、类型与分布及其菌株宿主共生混交性与亲和性； ( 2 )评述了根瘤菌宿主植物共生体双边固氮改良，包括优良菌株的选育、宿主品种资源共生特性的评价与利用及特异性状的选择； ( 3 )讨论了我国这一类共生体资源的丰富性以及有必要进一步加大力度研究有益资源的开发和利用的问题。
