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感染云南烟草丛枝症病害的病苗的细胞切片中观察到类似于旁壁体的质膜体，旁壁体是类病毒侵染植物形成的特征病变结构，但多次双向电泳实验均未检测到类病毒分子，质膜体的形成可能和莫笑晗等发现的与云南烟草丛枝症病害相关的稳定ＲＮＡ有密切关系，但线性开环结构和失活温度说明其不具有类病毒核酸特征．
The plasma membrane body similar to the side wall body was observed in the cell sections of the diseased plants infected with tobacco witches bush disease of Yunnan Province. The side wall body was the characteristic lesion structure formed by the viroid-infected plants, but not detected by multiple two-dimensional electrophoresis The formation of virus-like molecules and plasma membrane bodies may be closely related to the stable RNAs found in Mozambique, such as those found in Mozambique, but the linear open-loop structure and inactivation temperature indicate that they do not possess the characteristics of virus-like nucleic acids .