四棱豆根瘤中类菌体结构的电镜观察
An Electron Microscopic Observations on the Bacteroid Structure of Root Nodules in Winged Bean(Psophocarpus tetragonolobus)
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摘要: 用透射电镜研究了四棱豆根瘤中根瘤菌类菌体细胞的超微结构.结果表明,根瘤发育过程经历着一系列细胞结构的变化.这些变化包括侵染线中细菌的释放、进入宿主细胞后发育成类菌体,并为包被膜所裹.在不同时期中,可见有四种基本结构的细菌,即侵染线中根瘤菌、未成熟类菌体、成熟类菌体及衰老类菌体.这些类型也表明了侵入细菌个体发育阶段上形态结构变化.本文详细描述上述变化,还讨论了这些变化的意义与四棱豆根瘤发育的关系.Abstract: The ultrastructure of root nodules of winged bean has been examined by trans mission electron microscopy.During development winged bean root nodules undergo a series of ultrastructural changes including the release of bacteria from the infection thread, rhizobia(Rhizobium sp.)infection that released into the host cells gradually turned to N-fixation bacteroids.The bacteroids are enclosed by envelope membranes(enclosing membrane or bacteroid perimembrane).In any asynchronous there are four different cells structural forms in root nodules:(A)immature bacteroids,(B)mature bacteroids,(C)senescent bacteroids and(D)infection thread rhizobia.During the individual development of a bacterial cells, a serie, of changes in morphological character have been observed.These changes are described in detail and the significance of the structural changes and their relationship to the development of root nodules are discussed.
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Key words:
- Root nodules of Winged bean /
- Rhizobium bacteroid /
- infrastructure
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[2] 吴以德. 1987. 根瘤菌一热带豆科树木共生关系研究, , 固氮根瘤细胞内细菌侵染线及类菌体共生结构变化. 全国植物细胞生物学学术讨论会论文摘要汇编. 159-160. 中国植物学会细胞学专业委员会, 湖南。 [4] 昊以德等. 1990. 共生发育中固氮生物膜超微结构的变化. 中国生物膜第四届学术讨论会论文摘要汇编. 第3页. 中国生物化学会、中国生物物理学会、中国细胞生物学学会联合出版, 北京 [9] Dixon KOD. L964. The structure of Infection Threads Bacteria and Bacteroids in Pea and Clover Root Nodules. Arch. Microbiol. 48: 166-178 [11] Harold, MF. 1966. Inorganic Polyphosphates in Biology; Structure, Metabolism and Function. Bacteriological Reviews, 30, 772-794 -
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