中国东北草原植物中的C_3和C_4光合作用途径  

DISTRIBUTION OF C 3 AND C 4 PHOTOSYNTHETIC PATHWAYS OF PLANTS ON THE STEPPE OF NORTHEASTERN CHINA

作　　者：殷立娟[1] 王萍[1] 

机构地区：[1]东北师范大学国家草地生态工程实验室

出　　处：《生态学报》1997年第2期113-123,共11页Acta Ecologica Sinica

基　　金：国家自然科学基金;加拿大国际开发署(CIDA;282/11471)资助

摘　　要：以光合作用关键羧化酶ＰＥＰＣ和ＲｕＢＰＣ活性比，并且参照叶片ＣＯ２补偿浓度，δ１３Ｃ值和叶片解剖结构特点来鉴定东北草原区２３３种植物的Ｃ３，或Ｃ４光合作用途径。这些植物隶属于１４４属３７科，其中１３７种为首次鉴定。８９种具有Ｃ４光合作用途径，隶属于５５属１７科；１４４种具有Ｃ３光合作用途径，隶属于９４属２８科。大多数Ｃ４种分布在禾本科（Ｐｏａｃｅａｅ）、莎草科（Ｃｙｐｅｒａｃｅａｅ）、苋科（Ａｍａｒａｎｔｈａｃｅａｅ）和藜科（Ｃｈｅｎｏｐｏｄｉ－ａｃｅａｅ）。苋属（Ａｍａｒａｎｔｈｕｓ）、地肤属（Ｋｏｃｈｉａ）、狗尾草属（Ｓｅｔａｒｉａ）和虎尾草属（Ｃｈｌｏｒｉｓ）中的均为Ｃ４植物。Ｃ４植物的生境多为干草原和盐碱草地，而Ｃ３植物则主要分布于草甸草原和干草原。然而，Ｃ４植物对热。By determining the PEPC/RuBPC activity ratio and the δ 13 C value, and by studying leaf anatomy, photosynthetic pathways of the plants on the steppe in Northeastern China has been ascertained. The CO 2 compensation concentration has also been used as a criterion. A total of 233 species belonging to 144 genera, 37 families were examined, of which 137 species for the first time, and the natural habitats in which they were grown were noted. Among them, 89 species from 55 genera, 17 families were found to be C 4 plants, while 143 species from94 genera, 28 families were C 3 plants. Most of the C 4 species belong to Poaceae, Cyperaceae, Amaranthaceae and Chenopodiaceae. All the species in the genera Amaranthus, Kochia, Setaria and Chloris identified are C 4 plants. The habitats of most C 4 species are dry steppe and salinized grassland and those of most C 3 species are meadow and dry steppe.

关 键 词：光合作用途径 C3植物 C4植物 东北草原 

分 类 号：Q949.405[生物学—植物学] S812[农业科学—草业科学]