摘要
对不同海拔高度的泡沙参叶表形态、气孔特征进行了观察 ,比较了不同海拔高度对泡沙参叶片生态适应的影响。结果表明 :泡沙参叶表皮角质层较厚 ,被有大量表皮毛和蜡质颗粒 ,海拔越高越明显 ;泡沙参气孔复体类型均为不规则型 ,气孔保卫细胞角质层较厚 ,气孔口较小 ,气孔密度与气孔大小成反比 ,并且气孔大小随海拔升高而减小 ,气孔密度随海拔升高而增大 ,是一种抗旱适应的表现。
Observed in this paper are the leaf epidermis and stomatal character of A. potaninii at different habitats, with effect of different altitude on the blade ecological adaptation of A. potaninii being compared.Studied results indicated: There are lots of epidermal hair in blade surface of A. potaninii, the cuticle of the leaf epidermis was usually identically striated, granular and scaly;Stomatal complex of A. potaninii is irregular type, stomatal guard cell cuticle of A. potaninii is quite thickness, stomatal opening is small, density and size of stomata of A. potaninii is a inverse ratio, with altitude increase, size of stomata of A. potaninii decrease, and density of stomata rise. The morphological characteristics demonstrate that A. potaninii has showed strong of drought resistant and adaptive ability for different altitude .
出处
《植物研究》
CAS
CSCD
北大核心
2003年第3期334-336,T004,共4页
Bulletin of Botanical Research
