He Pingrong, Song Xiqiang, Luo Yibo, He Minggao
College of Horticulture and Landscape Architecture, Hainan University, Danzhou 571737, China.
Zhongguo Zhong Yao Za Zhi. 2009 Jan;34(2):124-7.
To reveal the breeding system and endangered mechanism of Dendrobium officinale in Danxia landform.
The habitat, growth traits, floral phenology, propagation characteristic and status of resource destruction of D. officinale in Danxia landform were investigated.
The results showed that D. officinale grew in poor condition and the growth summit appeared in spring; its two- or three-years-old stems could be bloomed; higher seed-setting rate would be obtained when pollinated in time; the ovary began swelling after pollinated four or five days, until about 185 days later, the fruit matured; the seed-setting rate was very low (0.31%) in natural environment; only one clone was generated from one stem in a clump in annual.
D. officinale mainly reproduces by clonal propagation; over-collection is key factor which leads D. officinale to be in endangered status at present in this region.
揭示丹霞地貌中铁皮石斛的繁育系统及濒危机制。
对丹霞地貌中铁皮石斛的生境、生长特性、花期物候、繁殖特性及资源破坏状况进行调查。
结果表明，铁皮石斛生长状况不佳，生长高峰期出现在春季；其两到三年生的茎可以开花；及时授粉可获得较高的结实率；授粉四五天后子房开始膨大，约185天后果实成熟；自然环境下结实率很低（0.31%）；每年一丛中一根茎仅产生一个克隆体。
铁皮石斛主要通过克隆繁殖；过度采集是导致该地区目前铁皮石斛处于濒危状态的关键因素。
