anthocyanin

Smith says that some species, most famously maples, produce anthocyanin during autumn as a kind of antioxidant for trees.

史密斯说，一些物种，例如最有名的枫树，在秋天会产生的一种抗氧化剂的花青素。

Smith said the crimson anthocyanin protects the delicate mechanisms that allow the tree to extract all the nutrients from its leaves.

史密斯说，深红色的花青素保护着微妙的机制，它让树木从叶子里提取所需要的全部营养物。

The canopy pictured above gets its crimson hue from a pigment called anthocyanin, the same component that lends red cabbage its intense color.

图中华盖的深红色调来自一种称为花青素的色素，这种色素与红叶卷心菜的浓烈色彩有着相同的成分。