绿萝叶片的组织培养

绿萝（Epipremnum aureum(Linden et Andre)Bunting）系天南星科（Araceae） 麒麟叶属（Epipremnum）的一种木质藤本植物，常攀援于山石上、墙壁上或它树上附生，分枝多，枝悬垂，园艺上用作荫棚悬挂植物。绿萝的叶片薄革质，翠绿色，一般 （特别是叶面）有多数不规则的黄色斑块，极为美丽，它不仅是庭园观赏植物，而且还可折枝插瓶，经久不萎。本种不易开花，通常都是无性扦插繁殖门。迄今为止，关于绿萝的组织培养，除1986年K·Y．Paek等人报道用Scundapsus aureus(Epipremnum pinnatum)的茎央和腋芽进行培养外，尚未见到其他的报道。

AN INTERESTING SPECIES CERCOSPORA EUPATORII

Abstract Having been stored under about 9 °C, air-proof condition for 24 months, the seeds of Elsholtzia bland a (Benth.) Benth can also keep their ger-mination up to 87%. The whole life of this plant from seeds to its ripeness and withered to yellow is 8-9 months. The essential oil content and chemical components of the wild plants collected from different ecological conditions varied obviously. The essential oil content of the plants growing under cultivated condition, shows a gradually increasing from 0.42% to 0.88%, along with the ripeness of the plant growth and development. There are some certain rules of variation with those main chemical components such as linalool, 1,8-cineol, phenyl alcohone, t-linalool oxide, comphor and borneol. Other components are less varied.