崇明东滩海三棱藨草生殖对策探讨  

Discussion about Reproduction Strategies of Scirpus mariqueter in Chongming Dongtan

作　　者：王亮[1] 李静[2] 杨娟[3] 蔡永立[3] 

机构地区：[1]盐城师范学院城市与资源环境学院,江苏盐城224002 [2]安徽农业大学林学与园林学院,安徽合肥230036 [3]华东师范大学资源与环境学院,上海200062

出　　处：《信阳师范学院学报（自然科学版）》2008年第4期539-542,共4页Journal of Xinyang Normal University(Natural Science Edition)

基　　金：上海市科委重大项目(05DZ12007)

摘　　要：克隆植物海三棱藨草(Scirpus mariqueter)是多年生耐盐耐淹性植物,也是一种典型的先锋植物,它在中潮位地带生长最好.有性生殖是克隆植物更新的有效手段之一.本文探讨海三棱藨草在不同干扰条件下的有性生殖投资,统计和分析海三棱藨草植株密度和高度,果实的特征,种子的特征,并进行了海三棱藨草植株主要指标的相关性分析.结果表明:水位不是海三棱藨草生长的限制因子;在植株密度较低或生境比较适宜时,克隆植物的有性生殖投资比例将会提高;而当在植株密度较高或环境胁迫压力较大时,克隆植物的无性生殖投资比例将会提高.Scirpus mariqueter is a perennial and salt and flood-tolerant clone plant; it is also a typical pioneer plant which grows best in the mean tide level. Sexual reproduction is an effective method of clone plant regeneration. In this paper, we discuss the sexual reproduction investment about Scirpus mariqueter under different disturbance conditions. The plant density and height, some characteristics of fruit and seed and the relativity of main indexes are analyzed. We find that water table is not a restrictive factor on the plant growth ; when plant density is low or site conditions are favorable, the proportion of sexual reproduction is high; when plant density is high or site conditions are unfavorable, the proportion of asexual reproduction is high.

关 键 词：海三棱蔗草 果实 种子 有性生殖投资 

分 类 号：Q948.1[生物学—植物学]