摘要
为了探讨大果木莲的濒危机制,以非濒危同属近缘种中缅木莲为对照,对二者的生境、种子特征及萌发特性进行了比较研究。结果表明：大果木莲聚合果大小约为中缅木莲的2倍,蓇葖果数量约为其1/2,理论种子生产力（胚珠数）为其61%,实际种子生产力（结实量）为其58.8%,萌发时间较中缅木莲长10~15 d,二者萌发率都在60%以上,但大果木莲的萌发率变异高达39.6%。大果木莲生境多为石灰岩山地,岩石裸露较多,环境潮湿,萌发更新环境较中缅木莲恶劣。
To probe the endangering causes of Manglietia grandis, taking no endangered M. hooleeri, a sibling species as the control, habitat, seed modality and germination characteristics of these two plants were studied and compared. The results showed that the size of aggregate fruits of M. grandis was 2 times more than that of M. hookeri, and the number of fruit follicle, ovule quantity and burliness quantity were respectively 1/2, 61% and 58.8% of the latter. Time of seed germination of M. grandis was 10--15 days earlier than that of M. hookeri. Germination ratios of these two plants were over 60%, and variation of germination ratio of M. grandis was up to 39.6%. The growth habitats of endangered M. grandis were located in hilly and rocky area with limestone, worse than those of M. hookeri.
出处
《西北林学院学报》
CSCD
北大核心
2009年第6期33-37,共5页
Journal of Northwest Forestry University
基金
云南省自然科学基金项目(2006C0066M)
