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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
On the 4th, 9th and 14th days after the inoculation of soybean cyst nematode 4, the ultrastructure of syncytium in the roots of black bean and Yuanpai black bean and the susceptible control Lu Dou No.1 Were studied. The results showed that the syncytial cells of susceptible cultivars were larger, with internal growth on the side close to the xylem, and various organelles were abundant. The number of endoplasmic reticulum was long and mostly smooth, while that of disease-resistant cultivars was smaller. Ribose The body is more, the endoplasmic reticulum smaller and smaller, mostly rough type, more fat-like cells in the cell, early in the infection, the rapid degradation of the cytoplasm, and sometimes found the plasma membrane and cell wall separation