Response of Somatal Characteristics and its Plasticity to Different Light Intensities in Leaves of Seven Tropical Woody Seedlings

编号 zgly0000339000

文献类型 期刊论文

文献题名 Response of Somatal Characteristics and its Plasticity to Different Light Intensities in Leaves of Seven Tropical Woody Seedlings

学科分类 220.1060;森林生态学

作者 CAIZhiquan  QIXing  CAOKunfang 

作者单位 XishuangbannaTropicalBotanicalGardenChineseAcademoSciences  Mengla666303.P.R.China 

母体文献 中国林业科技: 英文版 

年卷期 2004,3(2)

页码 1-7

年份 2004 

分类号 S718.512.2 

关键词 热带雨林  光照强度  可塑性  气孔特征  林冠  森林植物学 

文摘内容 Stomatal characteristics and its plasticity were surveyed in leaves of four canopy species, Shorea chinensis, Pometia tomentosa, Anthocephalus chinensis, Calophyllun polyanthum and three middle-layer species, Barringtonia pendula, Garcinia hanburyi, Horsfieldia tetratepala, acclimated to different light conditions for more than one year. All plant's stomata are distributed on the abaxial of leaves. Pometia tomentosa and Barringtonia pendula have higher stomatal density and the guard cell length of Anthocephalus chinensis and Calophyllun polyanthum were much greater than others'. Stomatal density and stomatal index (ratio of stomatal numbers to epidermal cell number) were increased with growth irradiance increased, while numbers of stomata per leaf were higher in the low than the high relative PFD, and stomatal conductance of leaves was the highest in the 50% of full light except for Anthocephalus chinensis. The relative PFD has little effects on the guard cell length of all seven plants. We have also found a significant negative correlation between stomatal density and leaf area, but the stomatal conductance was not significantly positive with the stomatal conductance. The analysis of phenotypic plasticity of stomatal characteristics showed: plasticity index for stomatal index and numbers of stomatal per leaf were similar for canopy and middle-layer species,while the plasticity index of stomatal density and stomatal conductance were significantly greater for canopy species than middle-layer species. The high plasticity of canopy species was consistent with the hypothesis that specialization in a more favorable environment increases plasticity。