金沙江河谷地区豆科树种根瘤菌耐干热研究  

Study on Drought-hot Tolerance of Rhizobia Strains of Legume Isolated from Jinshajiang River Dry-hot Valley

作　　者：曾小红[1] 伍建榕[1] 马焕成[1] 郭瑞超[1] 张丽芬[1] 肖斌[1] 

机构地区：[1]西南林学院生态工程研究所,昆明650224

出　　处：《水土保持研究》2006年第4期75-77,共3页Research of Soil and Water Conservation

基　　金：云南省自然科学基金(编号203305)

摘　　要：本实验在人工设置高温和模拟干旱条件下,对分离自金沙江河谷地区的12株豆科树种根瘤菌菌株进行耐干热分析。结果显示,12株供试菌株对干热表现出不同的耐受性,大部分菌株如:P5-1、P5-6、P5-8、P6-11、Y8-12、P5-5、Y6-13、P5-7能忍受40℃的高温;在人工模拟干旱的高渗环境中,也有部分菌株(P5-1、P5-2、P5-6、P5-7)表现出极强的耐受能力。通过本次的耐性研究,发现菌株P5-1、P5-6、P5-7不仅能在40℃的高温下生长而且在-8.71×105Pa,35℃的条件下也能很好的存活。In this study, 12 strains isolated from the root nodules of woody legumes in the various regions of Jinshajiang River dry-hot valley were used to study the drought-hot tolerance by adding Polythylene glycol 6 000 to YME brouth medium and controlling the temperature. The results indicated that, the 12 strains had different tolerance ability to drought-hot, such as P5 - 1 ,P5-6, P5- 8 ,P6- 11, Y8- 12, P5-5 ,Y6- 13 ,PS-7,and lots of stains could resistant temperature 40℃ such as P5- 1, P5- 2, PS-6, P5-7. In the brouth medium which adding PEG, there were a lot of strains had indicated the strong tolerance ability. From this study of resistance, P5-1, P5-6, P5-7 not only could grow at temperature 40℃ but also in the condition of -8.71×10^5 Pa and 35℃.

关 键 词：根瘤菌 耐干热性 模拟干热 

分 类 号：Q948[生物学—植物学]