Metabolic profiling of red jabon leaves using UPLC-QToF-MS/MS: effects of leaf age and site elevation on putative bioactive compounds.

In general, mature leaves showed a higher number of metabolite features than young leaves at all elevation levels. At altitude A (0–100 m a. s.l.), mature leaves had 211 features, while young leaves had 183 features. At altitude B (100–200 m a. s.l.), mature leaves had 196 features, while young leaves had 188 features. At elevation C (>200 m a.s.l.), mature leaves had 227 features, whereas young leaves had 202 features.

总体而言，在所有海拔梯度下，成熟叶片的代谢物特征（metabolite features）数量均高于幼叶。在海拔A区间（0–100 m a.s.l.），成熟叶片的代谢物特征数量为211，幼叶为183；在海拔B区间（100–200 m a.s.l.），成熟叶片的代谢物特征数量为196，幼叶为188；在海拔C区间（>200 m a.s.l.），成熟叶片的代谢物特征数量为227，幼叶则为202。