兰科组织培养玻璃化现象研究进展

兰科植物是当前花卉产业最重要的花卉之一,近年来,随着组培快繁技术逐步走向实用,兰科植物产业也得以飞速发展。在兰科植物的大规模工厂化育苗中,伴随着组织培养继代代数的升高,培养后代玻璃化比率也随之加大。

FURTHER OBSERVATION OF THE SPERMATOZOA OF LEFT-EYE FLOUNDER PARALICHTHYS OLIVACEUS BY ELECTRONIC MICROSCOPY

The spermatozoon ultrastructure of left-eye flounder, Paralichthys olivaceus, was observed by electronic microscopy, and shown to consist of head, midpiece and tail. Some nuclear vacuoles were observed inside and along the outer part of the nucleus and double-membrane structures were observed between the nuclear membrane and plasma membrane. The sperm sleeve consisted of four independent parts and had more than four mitochondria. Along the sperm tail there were wing-like lateral fins.

怀念唐进、汪发缵老师

唐进教授(1897—1984)与汪发缵教授(1899—1985)相继离开我们了。两位老师毕生合作,从事单子叶植物研究工作,对我国植物分类学的发展作出了重要贡献。他们不仅给我们留下了宝贵的科学论著和资料,而且留下了许多值得学习的好思想、好学风。唐进教授,江苏吴江人,早年曾在日本与菲律宾上学,后来就读于金陵大学,岭南大学和北平农业大学的生化与农学等专业。毕业后在淮阴甲种农校。