小麦条锈菌吸器母细胞入侵菌丝现象的进一步研究

应用电镜技术对小麦条锈菌吸器母细胞入侵自身菌丝的现象进行了研究，观察发现，在吸器母细胞与寄主细胞和菌丝细胞同时相接触的情况下，入侵栓可在与寄主细胞接触处形成，也可在与菌丝接触处形成；在菌落中心部位，吸器母细胞虽然未与寄主细胞接触，但同样可在与菌丝细胞接触处产生入侵栓；吸器母细胞在与菌丝接触处形成的人侵栓，其超微结构正常，并且可侵入到菌丝细胞壁内，但是未能穿透菌丝细胞壁。本文观察结果表明，小麦条锈菌吸器母细胞和人侵栓形成所需诱导因子可能是物理接触作用，而不涉及到化学作用，并且该病菌与寄主间的识别作用可能发生在入侵栓形成之后。

FURTHER STUDIES ON THE INVASION OF HAUSTORIAL MOTHER CELL OF PUCCINIA STRIIFORMIS WEST.TO ITS OWN INTERCELLULAR HYPHAE

The invasion of haustorial mother cell to its own intercellular hyphae in wheat stripe rust fungus was studied with electron microscope.It was observed that while a haustorial mother cell touched with host cell and the intercel- lular hyphae simultaneously,it produced a penetration peg randomly against host cell or the intercellular hyphae,and in the center of colony a haustorial mother cell without touchment with host cell could also produce a penetration peg against the intercellular hyphae.Although the penetration pegs,formed on haustorial mother cell wall against the intercellular hyphae,were with normal ultrastructure and had invaded into the intercellular hyphae wall,they failed to penetrate through the hyp- hal wall.The results indicate that inducing factor for formation of haustorial mo- ther cell and penetration peg may be physical toucbment but chemical stimulation and the recognition between this pathogen and its host may take place after the for- mation of penetration peg.