从采后贮藏过程中发病的冬枣、樱桃、杏及蓝莓果实中分离到4株丝状病原真菌231#、320#、322#和333#。由形态学特征观察可确定4株病原菌均为链格孢属真菌(Alternaria Nees),r DNA ITS区序列进化树分析结果表明樱桃320#和杏322#与A.altern...从采后贮藏过程中发病的冬枣、樱桃、杏及蓝莓果实中分离到4株丝状病原真菌231#、320#、322#和333#。由形态学特征观察可确定4株病原菌均为链格孢属真菌(Alternaria Nees),r DNA ITS区序列进化树分析结果表明樱桃320#和杏322#与A.alternata(AY625056.1)处于同一分枝,置信度达100%;而蓝莓333#与A.tenuissima(KP324980.1)处于同一分枝,冬枣231#与蓝莓333#和A.tenuissima(KP324980.1)的亲缘性很近,在同一分支上的置信度达100%。对95种碳源的代谢指纹图谱分析的结果表明,4株链格孢属真菌对吐温80、N-乙酰-D-葡萄糖胺、N-乙酰-β-D-甘露糖胺等86种碳源的代谢特征相同,包括78种最适碳源和8种不可利用碳源,其中冬枣231#与A.alternata(Fr.)Keissl的代谢指纹图谱最为相近。4株链格孢属真菌的ITS区序列系统进化树分类与碳源代谢聚类分析结果存在一定差异。展开更多
To understand the diversity of culturable fungi in soil at alpine sites, Rhododendron fruticosa shrubland, Salix cupularis fruticosa shrubland, and Dasiphoru fruticosa shrubland of the Eastern Qilian Mountains were se...To understand the diversity of culturable fungi in soil at alpine sites, Rhododendron fruticosa shrubland, Salix cupularis fruticosa shrubland, and Dasiphoru fruticosa shrubland of the Eastern Qilian Mountains were selected to investigate. Three methods, including tradi- tional culturing, rDNA internal transcribed spacer （ITS） sequence analysis, and economical efficiency analysis, were carried out to estimate the diversity of soil culturable fungi of these three alpine shmblands. A total of 35 strains of culturable fungi were cultured by dilution plate technique and were analyzed by rDNA ITS sequence. The diversity indices such as species abundance （S）, Shannon-Wiener index （H）, Simpson dominance index （D）, and Pielou evenness index （3） of Rhododendron fruticosa shrubland, Salix cupularis fruticosa shrubland, and Dasiphoru fruticosa shrubland were ranged between 16 and 17, 2.66-2.71, 0.92, 0.95~）.97 respectively. The results showed that the diversity of soil fungi were abundant in these three types of alpine shrub grasslands, while further study should be done to explore their potential value.展开更多
旨在通过形态学观察、r DNA ITS序列分析以及Biolog微生物鉴定系统对霉菌进行鉴定,并通过计算平均吸光值(AWCD)了解霉菌的生长情况以及各类碳源的消耗量,运用数据分析霉菌的碳源利用情况。结果表明,结合r DNA ITS序列、形态学观察以及Bi...旨在通过形态学观察、r DNA ITS序列分析以及Biolog微生物鉴定系统对霉菌进行鉴定,并通过计算平均吸光值(AWCD)了解霉菌的生长情况以及各类碳源的消耗量,运用数据分析霉菌的碳源利用情况。结果表明,结合r DNA ITS序列、形态学观察以及Biolog鉴定系统确定菌株为黑曲霉;比较8类碳源消耗情况,可知对氨基酸类、脂类、酸类的利用最多,根据碳源代谢情况列出15种最先利用碳源。鉴定菌株为黑曲霉,且该菌株的最适碳源为P-羟苯乙酸,可作为耐酸曲霉代谢研究的材料。展开更多
文摘从采后贮藏过程中发病的冬枣、樱桃、杏及蓝莓果实中分离到4株丝状病原真菌231#、320#、322#和333#。由形态学特征观察可确定4株病原菌均为链格孢属真菌(Alternaria Nees),r DNA ITS区序列进化树分析结果表明樱桃320#和杏322#与A.alternata(AY625056.1)处于同一分枝,置信度达100%;而蓝莓333#与A.tenuissima(KP324980.1)处于同一分枝,冬枣231#与蓝莓333#和A.tenuissima(KP324980.1)的亲缘性很近,在同一分支上的置信度达100%。对95种碳源的代谢指纹图谱分析的结果表明,4株链格孢属真菌对吐温80、N-乙酰-D-葡萄糖胺、N-乙酰-β-D-甘露糖胺等86种碳源的代谢特征相同,包括78种最适碳源和8种不可利用碳源,其中冬枣231#与A.alternata(Fr.)Keissl的代谢指纹图谱最为相近。4株链格孢属真菌的ITS区序列系统进化树分类与碳源代谢聚类分析结果存在一定差异。
文摘To understand the diversity of culturable fungi in soil at alpine sites, Rhododendron fruticosa shrubland, Salix cupularis fruticosa shrubland, and Dasiphoru fruticosa shrubland of the Eastern Qilian Mountains were selected to investigate. Three methods, including tradi- tional culturing, rDNA internal transcribed spacer （ITS） sequence analysis, and economical efficiency analysis, were carried out to estimate the diversity of soil culturable fungi of these three alpine shmblands. A total of 35 strains of culturable fungi were cultured by dilution plate technique and were analyzed by rDNA ITS sequence. The diversity indices such as species abundance （S）, Shannon-Wiener index （H）, Simpson dominance index （D）, and Pielou evenness index （3） of Rhododendron fruticosa shrubland, Salix cupularis fruticosa shrubland, and Dasiphoru fruticosa shrubland were ranged between 16 and 17, 2.66-2.71, 0.92, 0.95~）.97 respectively. The results showed that the diversity of soil fungi were abundant in these three types of alpine shrub grasslands, while further study should be done to explore their potential value.
文摘旨在通过形态学观察、r DNA ITS序列分析以及Biolog微生物鉴定系统对霉菌进行鉴定,并通过计算平均吸光值(AWCD)了解霉菌的生长情况以及各类碳源的消耗量,运用数据分析霉菌的碳源利用情况。结果表明,结合r DNA ITS序列、形态学观察以及Biolog鉴定系统确定菌株为黑曲霉;比较8类碳源消耗情况,可知对氨基酸类、脂类、酸类的利用最多,根据碳源代谢情况列出15种最先利用碳源。鉴定菌株为黑曲霉,且该菌株的最适碳源为P-羟苯乙酸,可作为耐酸曲霉代谢研究的材料。
