摘要
本文对干草原向荒漠草原过渡地带的33种草原常见植物进行了解剖研究。根据同化枝组织的差异可分为正常型、全栅型、对称型、环栅型、C_4型、退化型六种类型。这说明植物在同一地带对环境有多种多样的适应方式,并以其同化枝的组织结构表现出来。其中有典型的中生植物、典型的旱生植物及过渡类型。探索了植物从中生向旱生演化的过程为:正常型→全栅型→对称型→环栅型。C_4型是适应干旱环境的一种较高级形式,退化型则是一种较低级的适应方式。
According to the differences of assimilatine branches structure, thirty-three plant species in transitive region of steppe to desert steppe observed are divided into six types: normal, total-palisade, symmetry, ringpalisade, C_4 and reduced type. It is proved that different plants may adapt to the same environment in various way, which is expressed on their structures of assimilatine branches. The plants are typical mesophyte, typical xerophyte and intermediate between mesophyte and xerophyte. It is being proved that the course of the anatomical structures evolution from mesophyte to xerophyte is considered that: normal-total-palisade-symmetry-ring-palisade. The C_4 type is in a higher lever and the reduced is in a passive lever for adapting to their environment.
出处
《西北植物学报》
CAS
CSCD
北大核心
1989年第3期191-196,共6页
Acta Botanica Boreali-Occidentalia Sinica
关键词
同化枝
解剖结构
草原植物
Assimilatine branches
Palisade tissue
Spongy tissue
