盐胁迫对柱胞鱼腥藻细胞结构和固氮作用的影响  

EFFECTS OF SALT STRESS ON CELL STRUCTURE AND N_2 FIXATION IN BLUE-GREEN ALGA ANABAENA CYLINDRICA

作　　者：黄开耀[1] 郭厚良[1] 易平[1] 

机构地区：[1]武汉大学生命科学学院

出　　处：《植物学通报》1998年第3期54-56,共3页Chinese Bulletin of Botany

基　　金：国家自然科学基金

摘　　要：在含ＫＣｌ的条件下培养，柱胞鱼腥藻细胞膨大，球形化，色素质靠向细胞一侧，另一侧变成无色透明区。电镜检查，无色透明区形成液泡。此种结构改变是可逆的，ＣａＣｌ２可抵消ＫＣｌ的这种作用。在含ＫＣｌ的无氮培养基中培养，柱胞鱼腥藻生长迟缓，细胞黄化，乙炔还原法测定固氮活性下降９５％。Growing in the medium containing KCl,NaNO_3,(NH_4)_2SO_4, the cells of the bluegreen alga inflated in size and became spherical, the pigment region gathered at one side of the cell and the other side became transparent. The changes in cell structure were reversible and the effect of KCl could be offset by CaCl_2. Growing in the nitrogenfree medium containing 0.1 mol KCl the trichomes became yellow and the N_2 fixing activity decreased by 95%.

关 键 词：柱胞鱼腥藻 盐胁迫 液泡 固氮作用 

分 类 号：Q945[生物学—植物学] Q949.205