Fig. 1

Leaf color and biochemical analysis of changes in red maple during leaf senescence. a Sampling location. The source of map depicted in (a) is from BIGMAP Company. b Stages of leaf senescence. GL, non-senescing leaves, fully expanded green leaves; YL, senescing leaves, 100% yellowing of the leaf surface; ~ 95% chlorophyll loss. c Changes in the relative populations of biological macromolecules during leaf senescence. “Total” refers to the total number of metabolites changed from senescent to non-senescent leaves. d Statistics of differential genes in macromolecular metabolic pathways during leaf senescence. “GL-vs-YL” means “non-senescing leaves compared senescing leaves”