Guo S
Institute of Medicinal Plant Development, Beijing.
Zhongguo Yi Xue Ke Xue Yuan Xue Bao. 1991 Feb;13(1):46-9.
This paper reports the results of studies on the effects of fungi isolated from the protocorms of Orchidaceae on the course of seed germination of D. lohohens and D. candidum. The experiments revealed that these fungi could promote seed germination: the seed germination rate of D. lohohens was 20%, that of D. candidum was 64%, and that of control was zero. The changes of cell ultrastructure in the course of fungus-infected seed germination of D. candidum was also studied. After hyphae of M. osmundicola penetrate the embryo from the suspensor, organelles of embryonic cells infected with fungi will disappear. When the hyphae wall is thickened and enclosed by the embryo's, the hyphae will be digested and used as the source of nutrition for seed germination. Also, the metabolism of cells without infection, but adjacent to those cells penetrated by hyphae is enhanced.
本文报道了从兰科原球茎中分离出的真菌对霍山石斛和铁皮石斛种子萌发过程影响的研究结果。实验表明，这些真菌能够促进种子萌发：霍山石斛的种子萌发率为20%，铁皮石斛的种子萌发率为64%，而对照组的种子萌发率为零。同时，还研究了铁皮石斛受真菌感染种子萌发过程中细胞超微结构的变化。当芒萁小菇的菌丝从胚柄侵入胚后，受真菌感染的胚细胞中的细胞器会消失。当菌丝壁增厚并被胚壁包围时，菌丝会被消化并作为种子萌发的营养来源。此外，未受感染但与被菌丝穿透的细胞相邻的细胞代谢会增强。
