摘要
本文主要探讨了不同盐度海水砂培的海莲幼苗生长量和某些生理生态特性与盐度的相关效应。结果表明,生长基盐度20‰以上,海莲繁殖体的萌苗时间推迟,成活率降低;随着盐度的提高,幼苗高生长量降低,叶片变小;叶片叶绿素含量随盐度提高而提高,相反的叶片可溶性糖含量则降低,而叶片可溶性蛋白质含量变化不明显;叶片组织内氯含量随盐度提高而提高;随着盐度的提高,叶片蒸腾作用减弱,气孔导度降低。由此表明,海莲幼苗适宜生长的盐度范围在15‰以下,更高的盐度表现为生态抗盐适应性生长。
This paper deals with the effect of seawater salinity in sand culture medium on the shoot increments of viviparous propagules and some eco-physiological characteristics of Bruguiera sexangula (Lour.) Poir. seedlings. The results showed that: 1) When the salinity is higher than 20‰, the shoot increment postponed and survival rate declined. 2) With increase in salinity (5—35‰), the height growth of seedlings decreased and leaf became smaller in size. 3) With increasing salinity from 5‰ to 35‰, the content of chlorophyll in leaves increased, whereas the content of soluble sugar in leaves decreased, but the soluble protein content was not significantly affected under different saline conditions. 4) The Cl content in leaves increased with increase in salinity. 5) As the salinity increased from 5‰ to 35‰, the transpiration intensity and stomatal conductance of leaves declined. The more adaptable range of salinity for B. sexangula seedling to grow was bellow 15‰ salinity.
出处
《应用生态学报》
CAS
CSCD
1992年第1期9-14,共6页
Chinese Journal of Applied Ecology
关键词
红树林
海莲
生长量
生理生态
盐度
Mangrove, Bruguiera sexangula, Increment, Eco-physiology, Salinity.
