Plot diversity differentially affects the chemical composition of leaves, roots and root exudates in four subtropical tree species

摘要: O_LIPlants produce thousands of compounds, collectively called the metabolome, which mediate interactions with other organisms. The metabolome an individual plant may change according to number and nature these interactions. We tested hypothesis that tree diversity level affects four subtropical species in a biodiversity ecosystem-functioning experiment, BEF-China. postulated chemical leaves, roots root exudates increases diversity. expected strength this effect differ among leaf, samples. Considering their role competition, we find strongest effects exudates. C_LIO_LIIn ecometabolomics approach, roots, leaves (Cinnamomum camphora, Cyclobalanopsis glauca, Daphniphyllum oldhamii, Schima superba) were sampled from selected plots Samples extracted analysed using Liquid Chromatography-Time Flight-Mass Spectrometry. exudate metabolomes normalized over non-purgeable organic carbon level. Multivariate analyses applied identify both neighbouring (local) trees plot on metabolomes. sample specific metabolites assigned major compound classes ClassyFire tool, whereas m/z features related annotated manually. C_LIO_LIIndividual showed distinct main class flavonoids, carboxylic acids, prenol lipids alkaloids most prominent roots. Overall had stronger profiles than local, directly trees. Leaf responded more often exudates, varied least. found not overall correlation between metabolite richness or C_LIO_LISynthesis: Classification supported initial ecological interpretation differences organs. Particularly respond These responses neither linear nor uniform different dynamics. More controlled interaction experiments are needed dissect causes consequences observed shifts C_LI