青榨槭

4增强UV-B辐射处理降低了两种幼苗UV-B吸收物质含量和类胡萝卜素含量，增加青榨槭表皮层厚度和红桦栅栏组织厚度。

The enhanced UV-B radiation reduced the epidermis thickness of Acer davidii and palisade tissue thickness of Betula albo-sinensis . Contrary to what was expected , enhanced UV-B radiation decreased the carotenoid UV-absorbing compound content in leaves of both species suggesting a reduction in protection provided .

青榨槭在50%遮光处理叶片厚度和海绵组织厚度最大，分别为97.0μm和55.3μm；

The max depth of leaves , the depth of sponge tissue of A. davidii under 50 % , was 97.0 μ m and 55.3 μ m , respectively ;

研究了遮光15%、35%、50%和全光照处理对青榨槭新梢生长、叶片色素含量、净光合速率以及叶绿素荧光参数的影响。

The shoot growth and the pigment content , net photosynthetic rate , transpiration rate and chlorophyll fluorescence of leaf under different shading treatments ( 0 % , 15 % , 35 % and 50 % ) were investigated in david maple seeding .