滇重楼寄生菌的研究

STUDIES ON THE PARASITES OF PARIS POLYPHYLA VAR. YUNNANENSIS

从滇重楼（Ｐａｒｉｓｐｏｌｙｐｈｙｌａｖａｒ．ｙｕｎｎａｎｅｎｓｉｓ）地下茎中分离和鉴定出两种细菌———蜡状芽孢杆菌（Ｂａｃｉｌｕｓｃｅｒｅｕｓ）和产碱假单胞菌（Ｐｓｅｕｄｏｍｏｎａｓａｌｃａｌｉｇｅｎｅｓ），以及三种真菌———黑团孢霉（Ｐｅｒｉｃｏｎｉａｓｐ．）、白色厚顶孢霉（Ｐａｃｈｎｏｃｙｂｅａｌｂｉｄａ）和重楼索霉（Ｈｏｒｍｏｍｙｃｅｓｐａｒｉｄｉｐｈｉｌｕｓ）。对蜡状芽孢杆菌、产碱假单胞菌和重楼索霉进行了液体培养并测定了胞外多糖含量，结果表明重楼索霉可分泌大量胞外多糖，这可能是导致滇重楼地下茎胶质化和多糖含量增加的原因。

Two bacteria and three fungi were isolated from the hypogeal stems of Paris polyphylla var. yunnanensis. The bacteria were identified as Bacillus cereus and Pseudomonas alcaligenes, and the fungi were identified as Periconia sp., Pachnocybe albida and Hormomyces paridiphilus. The results on liquid culture of B.cereus, P.alcaligenes and H.paridiphilus indicated that the colloidization and polysaccharide content increasing in hypogeal stems of P.polyphylla var. yunnanensis were due to the extracellular polysaccharide secretion of the parasitical fungus H.paridiphilus.