海南具C_4、C_3解剖特征的禾本科植物

Anatomical Characteristics of C_4 and C_3 Photosynthetic-pathway Poaceae Plants in Hainan

为了充分认识海南地区现有禾本科植物的光合途径类型,为该地区禾本科植物的种质资源学、生理生态学研究提供可靠的资料,通过调查并收集整理海南禾本科牧草种质资源,以C3、C4植物在解剖结构上的差异为基础,利用石蜡制片技术鉴定海南禾本科植物光合途径的类型。结果表明,在224份研究材料中,有189种禾草属于C4光合类型,35种禾草属于C3光合类型,分别占禾草种数的84%和16%,说明该区域禾草以高光效的C4类型为主。

To provide reliable information for research into germplasm resources and physiological ecology of Poaceae plants in Hainan,we used paraffin sections to distinguish Poaceae plants that use the C3 and C4 photosynthetic pathways by anatomical structure.We collected 224 species of 82 genera for analysis： 189 species used the C4 pathway and 35 the C3 pathway,for 84% and 16%,respectively,of the total Poaceae plants collected.C4 Poaceae pasture resources are abundant in Hainan.