中国小黑豆抗源对大豆孢囊线虫4号生理小种抗性机制的研究Ⅱ.抗感品种根部合胞体超微结构的比较

 接种大豆孢囊线虫4号生理小种后4、9、14天,对我国小黑豆抗源灰皮支黑豆和元钵黑豆及感病对照鲁豆1号根部形成的合胞体组织的超微结构进行了研究。结果发现:感病品种的合胞体细胞较大、靠近木质部导管一侧有内生长,各种细胞器丰富,内质网数量多形体长、多为光滑型;抗病品种合胞体细胞较小,核糖体较多,内质网小而少、多为粗糙型,细胞内出现较多的类脂肪体,在侵染早期,细胞质快速降解,有时发现细胞质膜与细胞壁发生分离。

MECHANISM OF RESISTANCE TO RACE 4 OF HETERODERA GLYCINES IN CHINESE BLACK SOYBEANS Ⅱ. ULTRASTRUCTURE OF SYNCYTIA IN THE ROOTS OF RESISTANT AND SUSCEPTIBLE SOYBEANS

The present paper deals with studies on the ultrastructure of syncytia in roots of resistant soybean varieties, Huipizhiheidou and Yuanboheidou,and susceptible control, Ludou No.1 at 4, 9, 14 days after inoculation. The results showed that there were bigger syncytium component cells, formation of all ingrowths and a lot of various organelles, especially with more and bigger smooth endoplasmic reticula in susceptible roots; whereas the syncytia in resistant roots were with smaller syncytium component cells, and there were more ribosomes, and less and smaller rough endoplasmic reticula,and more lipidlike droplets in their cytoplasm.It was also observed that the separation of plasmalmma from cell wall and the early degeneration of cytoplasm in resistant roots also occurred.