Abstract: The leaf chlorophyll content and Chla, Chlb, Chla/b of 57 evergreen tree species grown at two altitudes (1 200m and 455m) in Meihuashan National Nature Reserve were investigated. The main results were shown as follows:The values of Chla, Chlb, Chla+b and Chla/b of these trees distributed in a centralized region. The chlorophyll content of new leaves is higher than that of old leaves, Chla/b of new leaves is lower than that of old leaves. The chlorophyll content and Chla/b of tree leaves tended to decrease with the increasing altitude, and the trees grown at different altitudes (1 200m and 455m) had obvious differences. The photosynthesis characteristics of plants changed with the environment they grown.

Key words: evergreen forest, altitude, chlorophyll, photosynthesis

摘要： 选取福建梅花山海拔1200m和455m地区57种常绿植物为研究对象,测定两海拔的植物叶片叶绿素a和叶绿素b含量,并计算叶绿素a/b、总叶绿素含量。结果表明:(1)植物叶绿素a、b,叶绿素a+b及叶绿素a/b值大多分布在一个相对集中的区域。(2)多数植物新叶叶绿素含量高于老叶,叶绿素a/b值低于老叶,但是新、老叶无显著差异。(3)不同海拔的植物叶片总叶绿素含量和叶绿素a/b值有明显差异,低海拔地区明显高于高海拔地区。植物通过总叶绿素含量和a/b值的变化以适应不同环境条件。

关键词: 常绿林, 海拔, 叶绿素, 光合作用