天麻种子萌发动态及紫萁小菇菌丝侵入的细胞学观察

Cytological Observation on Hyphae Invading M ycena osm undicola in the Process of Seed Germination of Gastrodia elata Bl.

天麻种子靠消化侵入胚细胞的真菌——紫萁小菇等一类萌发菌获得营养而发芽。紫萁小菇以菌丝形态由胚柄细胞侵入胚,被原胚体细胞消化、吸收,分生细胞即开始分裂。初步被消化的菌丝由菌丝结集细胞侵入大型细胞,被最终消化。分生细胞不断获得营养,旺盛分裂,胚体长大突破种皮而发芽。

In order to obtain the nutrition necessary to sprout, Gastrodia elata seeds depend on digesting a kind of fungi(Mycena osmundicola Lange). Hyphae are enclosed and digested by embryonic cytoplasm after M. osmundicola penetrates the embryo through suspensor cells, and then meristem cells begin to divide. The digested hyphae penetrate into large cells to be further digested. The body of the embryo then enlarges and germinates under meristem cells using the nutrition thus obtained.