Abstract：To determine the appropriate irradiation dose threshold for rattan, the seeds from Daemonorops jenkinsiana, Calamus simplicifolius, C. rhabodcladus, and Plectocomia microstachys were used as material to be treated by irradiation from 60Co-γ, with the view to studying the effect of irradiation dose on the seed germination and seedling growth of the four rattan species. The results showed that seed germination rate, stem length, root length and plant length of the four species of rattan present general, significant or very significant decrease along with the increase of irradiation dose if the dose rate was at 5 gy/min and increased with the dose of 50 gy and the dose was limited in the range of 0-100 gy. When the irradiation dose was beyond 100 gy, the seed germination rate of the four species would decrease to 0, i. e., all the seeds stop growing. The linear regression equation, simulated with irradiation dose as dependent variable x, and germination rate as the independent variable y, indicated that the half-lethal irradiation doses to the four rattan species are 53.94 gy, 28.01 gy, 58.34 gy and 75 gy, respectively. It is concluded that seed germination and seedling growth are inhibited by irradiation when the irradiation dose is in the range of 50-100 gy. This result indicates it is probably hard to cultivate fast-growing rattan mutants by irradiation, but other targeted mutants are not exclusive.
李荣生, 尹光天, 杨锦昌, 邹文涛, 王旭, 余纽, 程林林. 辐照剂量对棕榈藤种子萌发和苗木生长的影响[J]. 世界竹藤通讯, 2016, 14(5): 7-11,21.
Li Rongsheng, Yin Guangtian, Yang Jinchang, Zou Wentao, Wang Xu, Yu Niu, Cheng Linlin. Effects of Irradiation Dose on Seed Germination and Seedling Growth of Rattans. World Bamboo and Rattan, 2016, 14(5): 7-11,21.