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作 者 ：林鹏, 陈德海, 李钨金

期 刊 ：植物生态学报 1984年 8卷 3期 页码：222-227

关键词：红树；

摘 要 ：本文是福建九龙江口红树林研究的一部分，主要讨论两种红树植物(秋茄，桐花树)叶片中的几种酶对海滩盐度(3—12‰范围内)变化的反应，测定结果如下：1，桐花树叶片过氧化物酶同工酶和细胞色素氧化酶同工酶的含量对土壤盐度变化的反应表明：土壤盐度(3—12‰)提高，过氧化物酶和细胞色素氧化酶同工酶的谱带加深、加宽，而且谱带中出现新酶带。 2．当海滩盐度提高时，桐花树叶片的过氧化物酶的活性提高，秋茄叶片的乙醇酸氧化酶的活性减弱。 3．两种红树植物叶绿素含量与土壤盐度相关性显示出：当土壤盐度在3—8‰范围时，叶绿素含量变化不大；8—10‰时有一个高峰，大于10‰时又下降。可能红树植物对海滩盐度适应有一个临界值。

Abstract:

This paper is part of a study of the mangrove forests in the estuary area of the Jiulongjiang River of Fujian Province. It deals mainly with the reaction of certain enzymes in the leaves of two species of mangroves, Aegiceras corniculatum (Myrsinaceae) and Kandelia candel (Rhizophoraceae) to the changes in the soil salinity of tidal areas within the range of 3--12‰.The main results of tests and measurements are as follows:

1. The reactions of the contents of peroxidase isozyme and cytochrome oxidase isozyme in the leaves of the Aegiceras corniculatum to the change in the salinity of the soil indicate that increase in the soil salinity within the range of 3--12‰ will deepen and widen the spectral band of peroxidase isozyme and cytochrome oxidase isozyme, and may even cause new enzyme band to appear in the spectra.

2. As the soil salinity of tidal areas increases, the activity of the peroxidase in the leaves of the Aegiceras corniculatum will be intensified, but that of the glycollic acid oxidase in the leaves of the Kandelia candel will be weakened.

3. The interrelationship of the chlorophyll contents in the leaves of the two species of mangrove plants and the soil salinity shows that when the soil salinity is within the range of 3--8‰, there will be not much change in the chlorophyll content, but there is a peak when salinity is between 8--10‰, over which the chlorophyll content will drop. This shows that it is possible that there exists a critical point in the mangrove’s adaptability to the soil salinity of tidal areas.

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