每到深秋之时,许多树木、花草叶片的颜色都会发生变化,满山遍野逐渐呈现红、黄、褐等各种各样的颜色。自古以来人们把这种叶子变色的现象叫做“红叶”现象。例如,银杏的叶变成了黄色,枫叶变成了红色。不仅落叶阔叶树和草本植物多见,常青树也可能会出现“红叶”现象。一、红叶中的色素陆生植物的叶片由于含有大量的叶绿素而呈现绿色,但是从叶绿素提取液的分离结果发现,色素中也含有少量的类胡萝卜素,如下 Every late autumn, many trees, flowers and leaves will change the color, the mountains and plains gradually showing red, yellow, brown and other various colors. The phenomenon of discoloration of such leaves since ancient times is called the “red leaves” phenomenon. For example, ginkgo leaves turn yellow and maple leaves turn red. Not only deciduous broad-leaved trees and herbs more common, evergreen trees may also appear “red leaves ” phenomenon. First, the leaves of pigment terrestrial plants due to the presence of a large number of chlorophyll and green, but from the separation of chlorophyll extract found that the pigment also contains a small amount of carotenoids, as follows