文献类型：期刊文献

中文题名：余甘子种子的抗逆生理特性及其对天然更新的影响

英文题名：Physiological characteristics of Phylanthus emblica seed stress-resistance and their influences on natural regeneration

作者：李昆[1,2] 崔凯[1] 张春华[1]

第一作者：李昆

机构：[1]中国林业科学研究院资源昆虫研究所,昆明650224;[2]国家林业局云南元谋荒漠生态系统定位研究站,昆明650224

年份：2009

卷号：28

期号：2

起止页码：243-248

中文期刊名：生态学杂志

外文期刊名：Chinese Journal of Ecology

收录：CSTPCD;;Scopus;北大核心:【北大核心2008】；CSCD:【CSCD2011_2012】；

基金：国家科技部“十一五”科技支撑资助项目(2006BAD03A0304和2006BAD03A0101)

语种：中文

中文关键词：干热河谷;余甘子;种子活力;天然更新

外文关键词：Yuanmou xerothermic valley; Phylanthus emblica; seed vigor; natural regeneration.

分类号：Q945.79

摘要：余甘子(Phylanthus emblica)是干热河谷植被的重要特征种和建群树种。本文通过模拟金沙江干热河谷典型地区元谋盆地4月气候条件下,研究了余甘子种子的活力散失机制及其有关生理生化变化情况,并对余甘子天然群落的自然更新状况进行了调查。结果表明:随着高温干旱处理时间延长,种子活力不断降低,相对电导率、Pro含量和MDA含量呈持续上升趋势;呼吸强度、SOD活性、POD活性、CAT活性、可溶性糖含量呈单峰曲线变化;膜保护酶系统活力降低和保护性物质含量减少是造成种子活力下降的主要因素;实验处理的第18天至第24天是余甘子种子抵御逆境的临界期;每年3月下旬至4月上、中旬,应采取人工辅助措施来提高其种子的天然更新能力。
Phylanthus emblica is the characteristic and dominant species of the vegetation in xerothermic valley. With the simulation of the climate conditions in April in Yuanmou basin, a typical area in the xerothermic valley of Jinsha River, this paper studied the vigor dissipation of P. emblica seeds, and related physiological and biochemical mechanisms. The natural regeneration of P. emblica population was also investigated. The results showed that with prolonging high temperature and drought, the seed vigor of P. emblica decreased, the relative electrical conductivity, Pro content, and MDA content in seed had an increasing trend, and the respiration intensity, activities of SOD, POD and CAT, and soluble sugar content in seed showed a single-peaked pattern. The decrease of membrane protective enzyme activities and of protective matter content was the key factor for the decrease of seed vigor. The period from the 18th to the 24th day of stress treatment was the critical period for the stress-resistance of P. emblica seeds. In order to improve the natural regeneration ability of P. emblica seeds, some artificial measures should be taken from the last ten-day of April to the early and mid March of the year.