中国帕米尔高原根瘤菌—豆科植物共生资源调查

Rhizobia in Pamirs Plateau of China: Investigation of Symbiotic Resources with Leguminous Plants

对帕米尔高原进行了根瘤菌——豆科植物共生资源的调查与收集,分析了根瘤的特征和根瘤菌的抗逆性.共采集到11属22种豆科植物,除菜豆、昆仑锦鸡儿、豇豆和白花草木樨等4种豆科植物未见结瘤外,其它豆科植物均能结瘤,其中帕米尔扁蓿豆、美丽棘豆、毛序棘豆、金毛脬萼黄芪等4种为新发现的结瘤豆科植物.共收集到8属18种豆科植物的根瘤样品250份,发现根瘤数量相对较少,颜色以白色或褐色为多,形状多样,多着生于主根、侧根的上部.通过对109株根瘤菌的抗逆性分析,获得一些具有耐低温和耐盐碱能力的优良菌株.

The study was conducted to investigate and collect the rhizobia in Pamirs Plateau of China： the symbiotic resources with leguminous plants, and analyze the characteristics of their nodules and their resistances to adversities. It totally collected 22 leguminous species belonging to 11 genera, and all the species but Melilotus alba, Vigna sinensis, Phaseolus vulgaris, and Caragana polourensis were found capable of setting nodules; of the nodule bearing leguminous species, there were four newly-discovered ones, which were Melissitus pamiricus, Oxytropis bella, Oxytropis trichosphaera, and Astragalus alopecurus. Meanwhile, it collected 250 nodule samples of 18 leguminous species belonging to 8 genera, and the samples indicated that their nodulation properties were bearing a small number of nodules a majority of which were white or brown in color and diverse in shape, and which distributed on the upper parts of taproots and lateral roots. The resistances of 109 strains of the rhizobia to adversities were analyzed and some good strains capable of tolerating low temperature and salt and alkali were screened.