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测定10个树种树木上的三年生枝条树皮内绿色组织的叶绿素含量、光合速率和枝干的呼吸速率的结果表明:10个树种树皮内叶绿素含量为0.0649～0.3460mg·g-1(FW),叶绿素a/b为1.05～1.91,均低于叶片或针叶;树皮内绿色组织的光合速率为0.21(红松)～2.06(水曲柳)μmol(O2)·m-2·s-1,枝干呼吸速率1.76(红松)～3.21(落叶松)μmol(O2)·min-1·g-1(FW)。树皮内绿色组织的光补偿点(LCP)、光饱和点(LSP)低于叶片,而表观量子效率(AQY)高于叶片或针叶。据此认为,树皮内绿色组织适应于阴生环境,所以有较强的耐阴能力。
The results showed that the content of chlorophyll in the bark of 10 tree species was 0.0649 ~ 0.3460 mg · g-1 (FW), and the chlorophyll content, , Chlorophyll a / b was 1.05-1.91, lower than leaves or needles. The photosynthetic rate of green tissues in the bark was 0.21 (Pinus koraiensis) ~ 2.06 (Ash) μmol (O2) · m-2 · s- 1, branch respiration rate 1.76 (Pinus koraiensis) ~ 3.21 (Larch) μmol (O2) · min-1 · g-1 (FW). The light compensation point (LCP) and light saturation point (LSP) of the green tissue in the bark were lower than those of the leaves, while the apparent quantum yield (AQY) was higher than that of the leaves or needles. Accordingly, the green tissue in the bark adapted to the shade environment, so there is a strong shade tolerance.