Based on the previous studies on numerical taxonomy, SDS\|PAGE of whole\|cell protein and DNA hybridization, the rhizobial strains isolated from \%Kummerowia\% sp. in semi\|arid area of North\|west constituted a new s...Based on the previous studies on numerical taxonomy, SDS\|PAGE of whole\|cell protein and DNA hybridization, the rhizobial strains isolated from \%Kummerowia\% sp. in semi\|arid area of North\|west constituted a new subgroup, the 16S rDNA sequence of representative strain SH714 were tested. The unrooted phylogenetic tree was produced. In this tree, the strain SH714 with \%Sinorhizobium xinjiangensis, S. fredii, S. meliloti, S. medicae, S. saheli\% and \%S. teranga\% constituted a branch of \%Sinorhizobium.\% Within this branch, the similarity valuse of 16S rDNA sequence between strain SH714 and \%S. xinjiangesis, S. fredii, S. meliloti, S. medicae, S. saheli\% and \%S. teranga\% were 97.4%, 97.5%, 96.8%, 96.7%, 97.2% and 95.6% respectively, the values were more than 95%, this indicated that these known species should belong to the same genus. The values of DNA homology between type strains of these species were less than 70%. Thus, the strain SH714 represented a new rhizobial species, and there were some diversity between SH714 and known rhizobial species in phenotypic feature and composition of protien.展开更多
The endophytic Bacillus amyloliquefaciens strain RS261 is a biological agent isolated from the leaf of Rhizophora stylosa.The efficacy of RS261 strain on control of capsicum phytophthora blight caused by Phytophthora ...The endophytic Bacillus amyloliquefaciens strain RS261 is a biological agent isolated from the leaf of Rhizophora stylosa.The efficacy of RS261 strain on control of capsicum phytophthora blight caused by Phytophthora capsici was studied by seed socking,root drenching and fruit spraying.The results showed that good biocontrol efficacy was achieved.It indicated that biocontrol with endophytic bacteria was an atternative and potential methed to control the capsicum seedlings and fruits phytophthora blight.展开更多
文摘Based on the previous studies on numerical taxonomy, SDS\|PAGE of whole\|cell protein and DNA hybridization, the rhizobial strains isolated from \%Kummerowia\% sp. in semi\|arid area of North\|west constituted a new subgroup, the 16S rDNA sequence of representative strain SH714 were tested. The unrooted phylogenetic tree was produced. In this tree, the strain SH714 with \%Sinorhizobium xinjiangensis, S. fredii, S. meliloti, S. medicae, S. saheli\% and \%S. teranga\% constituted a branch of \%Sinorhizobium.\% Within this branch, the similarity valuse of 16S rDNA sequence between strain SH714 and \%S. xinjiangesis, S. fredii, S. meliloti, S. medicae, S. saheli\% and \%S. teranga\% were 97.4%, 97.5%, 96.8%, 96.7%, 97.2% and 95.6% respectively, the values were more than 95%, this indicated that these known species should belong to the same genus. The values of DNA homology between type strains of these species were less than 70%. Thus, the strain SH714 represented a new rhizobial species, and there were some diversity between SH714 and known rhizobial species in phenotypic feature and composition of protien.
文摘The endophytic Bacillus amyloliquefaciens strain RS261 is a biological agent isolated from the leaf of Rhizophora stylosa.The efficacy of RS261 strain on control of capsicum phytophthora blight caused by Phytophthora capsici was studied by seed socking,root drenching and fruit spraying.The results showed that good biocontrol efficacy was achieved.It indicated that biocontrol with endophytic bacteria was an atternative and potential methed to control the capsicum seedlings and fruits phytophthora blight.
