不同海拔对七子花叶片色素含量、含水量及比叶面积的影响

通过比较浙江大盘山不同海拔(A1:550~660 m,A2:700~800 m,A3:900~990 m,A4:1 000~1 015 m,A5:1 020~1 100 m)七子花(Heptacodium miconioides)叶片色素含量、含水量及比叶面积变化,探讨不同海拔对七子花生长的影响。结果表明,随着海拔的升高,叶绿素含量(包括叶绿素a、叶绿素b、叶绿素a+b)先增加后减少,在A3达最高值;叶绿素a/b比值、类胡萝卜素含量变化呈先低后高,在A3降至最低;比叶面积及叶片含水量,在较高海拔A4、A5都明显下降。七子花通过叶片色素、比叶面积、干重和含水量的变化以适应高海拔环境。

Effects of Different Altitudes on Pigment Content, Water Content and Specific Leaf Area of Heptacodium miconioides

By comparing the changes of pigment content, specific leaf area and water content of seven-son flower (Heptacodium miconioides) leaves at different altitudes (A1:550~660 m, A2:700~800 m, A3:900~990 m, A4:1 000~1 015 m, A5:1 020~1 100 m) in Dapanshan Mountain, the effects of different altitudes on seven-son flower were studied.The results showed that the contents of chlorophyll a, chlorophyll b and chlorophyll a+b of seven-son flower leaves increased firstly and then decreased and their peak appeared at A3, but the diversification trend of content chlorophyll a/b and carotenoid of seven-son flower leaves were reverse, decreased firstly and then increased and their bottom appeared at was in A3.Specific leaf area and water content of seven-son flower leaves decreased significantly at high altitudes (A4 and A5).Seven-son flower may be adapted to environmental factors at higher altitudes by the transformation of pigment content, specific leaf area and water content of leaves.