【摘要】 为了给城市街道秋季有色叶植物的选择和配置提供理论依据,于2005-08~2005-12采用比色法连续测量枫香叶片中叶绿素,类胡萝卜素和花色素苷的含量,并探讨其与叶色变化的关系。结果表明,在8~12月份,枫香叶片叶绿素含量总体上呈下降的趋势,叶绿素a和b含量以及a/b的变化趋势与叶绿素总量的变化趋势相似;随季节变化,枫香叶片中类胡萝卜素和花色素苷含量的变化不明显;随着气温的下降,花色素苷的颜色逐渐地表现出来,在2种色素的共同作用下,枫香叶片逐渐由黄绿色变成红色、深红色;枫香叶色与花色素苷/叶绿素总量呈正相关关系,而与叶绿素总量呈很高的负相关关系,与类胡萝卜素、花色素苷绝对含量的变化关系不大;叶片pH的降低也是叶片逐渐变红的一个原因。更多还原

【Abstract】 e changes of the chlorophyll,carotenoid and anthocyanin content of leaves inLiquidambar formosanawere measured continuously by using spectrometer from August to December.The relationship between the leaves color and the content of pigments was also explored.The result showed that the chloro-phyll content ofLiquidambar formosanadecreased from August to December in a whole.The changing trends of the chlorophyll a,b and the ratio of chlorophyll a/chlorophyll b were similar to the total content of chlorophyll basically.The anthocyanin and carotenoid content kept relatively stable during different time and the pH value of leaves decreased so that the color of anthocyanin appeared.And the leaves color turned into red even deep red.Therefore,there was a positive correlation between the leaves color and anthocya-nin/chlorophyll,but highly negative correlation with the total chlorophyll contents,and the leaves color had nothing to do with the absolute content of carotenoid and anthocyanin.更多还原