鸡爪槭转色期叶色变化生理研究

PHYSIOLOGICAL CHANGES OF JAPANESE MAPLE(Acer palmatum Thunb)LEAVES DURING COLOR-CHANGING PERIOD

以杭州植物园与花港观鱼公园的鸡爪槭(Acer palmatum Thunb)成龄植株为材料,测定10月下旬至12月上旬鸡爪槭转色期叶绿素、花色素苷和可溶性糖含量的变化,比较不同光照强度及温度对叶色的影响。结果表明:叶片中叶绿素含量随时间的变化逐渐降低,树冠背阴面叶片中的叶绿素含量显著高于向阳面,阳面东向显著高于阳面西向;花色素苷的含量则随时间不断升高,11月21日之后变化尤其显著;可溶性糖含量在11月21日之前迅速增加,之后趋于稳定。温度与叶绿素含量呈显著正相关,与花色素苷和可溶性糖含量成显著负相关。

In order to reveal the physiological changes of maple leaf in autumn,Japanese maple trees（Acer palmatum Thunb） of 40 years old in Hangzhou Botanical Garden and Flower Harbor Park were selected,and samples were collected from the east sunny side,the west sunny side and the shady side of the trees.The contents of chlorophyll,anthocyanin and soluble sugar in maple leaves were measured during the color-changing period from late October to early December.The results indicated that the chlorophyll content decreased gradually,and the chlorophyll content of the leaves in the shady side of the tree was significantly higher than that of west sunny side,and the content in the sample of east sunny side was significantly higher than that of west sunny side.The anthocyanin content increased constantly,and the variation became remarkable after Nov.21st.The soluble sugar content grew rapidly before Nov.21st,and then became stable. The data showed a positive correlation between temperature and chlorophyll content,and a negative correlation between temperature and anthocyanin content,temperature and soluble sugar content.