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首页> 外文期刊>Acta Horticulturae >Cytopathological study of the double-membrane bodies occurring in fig plants affected by fig mosaic disease
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Cytopathological study of the double-membrane bodies occurring in fig plants affected by fig mosaic disease

机译：受无花果花叶病影响的无花果植物中双膜体的细胞病理学研究

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摘要

Cytological observations of fig leaves affected by fig mosaic disease confirmed the presence of typical double-membrane bodies (DMBs), possibly representing the disease agent in the cytoplasm of parenchyma cells. DMBs contained dense nucleotide, fine fibrils and ribosome-like particles and were often associated with characteristic matrices, consisting of aggregates of electrondense tubules. DMBs and matrices showed a specific association with endoplasmic reticulum (ER) and Golgi vesicles. The double envelope of DMBs reacted positively to silver proteinate, as did matrices, ER and dictyosomes, indicating the presence of carbohydrates. Postembedding RNase- and DNase-gold cytochemistry, aimed at identifying nucleic acid(s) inside DMBs, did not give conclusive results. On the grounds of size, morphology and intracellular behaviour, DMBs appeared quite different from any known plant pathogen. Possible similarities with pathogens not known to infect plants, such as pox viruses and Chlamydiae, are briefly discussed.
机译：受到无花果花叶病影响的无花果叶的细胞学观察证实，存在典型的双膜体（DMB），可能代表薄壁组织细胞质中的病原体。 DMBs含有致密的核苷酸，细纤维和核糖体样颗粒，通常与特征性基质相关，后者由电子致密小管的聚集体组成。 DMB和基质显示与内质网（ER）和高尔基小泡的特定关联。 DMB的双包膜与蛋白质银反应阳性，基质，ER和双核小体也是如此，表明存在碳水化合物。旨在鉴定DMB内核酸的RNase-和DNase-金的细胞后包埋方法没有得出结论性的结果。基于大小，形态和细胞内行为，DMB看起来与任何已知的植物病原体都大不相同。简要讨论了与未知感染植物的病原体（如痘病毒和衣原体）可能的相似性。

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