Lehrstuhl für Physiologie und Biochemie der Pflanzen, University of Konstanz, Gießberg, W-7750, Konstanz, Federal Republic of Germany.
Microb Ecol. 1991 Dec;22(1):271-83. doi: 10.1007/BF02540229.
The subspeciesNostoc commune var.flagelliforme andN. commune var.commune are found in China (Ningxia Province, Inner Mongolia) as two morphologically different ecotypes of the desiccation-independent cyanobacteriumN. commune. The first ecotype, but not the second, colonizes arid areas. Various biochemical parameters and water dependence of photosynthesis and nitrogen fixation were compared for both ecotypes. Different patterns of water stress proteins were found in the two ecotypes. Repeated desiccation resulted in an enhanced desiccation independence for photosynthesis and, in the case of the ecotypecommune, for nitrogen fixation. The different response of nitrogenase of both ecotypes towards repeated cycles of rewetting and desiccation under conditions simulating the natural environment is discussed in terms of the energy balance of the colonies that are adapted to different environmental conditions.
发菜的两个生态型在中国（宁夏回族自治区、内蒙古自治区）被发现，即具有不同形态的耐旱型蓝藻念珠藻的变种鞭枝藻和普通念珠藻。第一个生态型，但不是第二个，在干旱地区定殖。对这两个生态型的各种生化参数和光合作用及固氮对水的依赖性进行了比较。在两个生态型中发现了不同模式的水分胁迫蛋白。反复的干燥处理增强了两个生态型的光合作用以及普通念珠藻的固氮作用的耐旱性。根据适应不同环境条件的群体的能量平衡，讨论了两个生态型的固氮酶对模拟自然环境条件下的反复干湿循环的不同反应。
