濒危植物膝柄木生存现状及其恢复对策

The Surviving Situation and Restorative Counter-measures of Endangered Plant Bhesa sinica

膝柄木（Bhesa sinica）是卫矛科膝柄木属植物中分布最北的一个种，目前仅在广西海岸发现3株成年树和7株幼树，是我国几乎绝迹的特有种。膝柄木花期7～9月，次年3～4月果实成熟，很难有性繁殖。在群落演替中无更新层，将会被红鳞蒲桃（Syzigium hancei）和潺稿树（Litsea glutinosa）取代。膝柄木插条扦插处理20d后插条可以形成明显的愈伤组织圈，扦插60d的成活率最高为15％。建议通过人工快速繁殖或者组织培养措施实现膝柄木种群的恢复。

Bhesa sinica, the northmost distributing species of Bhesa Celastraceae, is the critical endangered endemic species in China. There are only 3 amature trees and 7 saplings were found along Guangxi coast until now. The florescence and fructescence of Bhesa sinica is from Jul to Sep and from Mar to Apr respectively. The sexual reproduction of Bhesa sinica is difficult. In future succession, due to the rare recruitments Bhesa sinica is more inferiority to Syzigium hancei and Litsea glutinosa. Experimental cutting propagation showed the obvious ring callus were developed after 20 days and the maximal survival rate of 60 days was 15%, It suggested that the population of Bhesa sinica restoration will be actualized by the fast propagation and tissue culture technology.