Fig. 2.

(A) Demonstrated the variation of relative abundance of different phytochemicals commonly found in the selected plants. Phytochemicals were selected based on presence in two or more plants. Data represented as mean ± SD of relative abundance in 2–5 plants. Apart from this, as summarized in Supplementary table 2-6, several phytochemicals were identified in a single plant. For example: Valeric acid, butenoic acid, hexenoic acid, phenylethanol, glyceric acid, levulinic acid and scopoletin were only detected in V. erubescens; farnesol, coumaric acid, linoleic acid, heneicosane, docosanol, methyl lignocerate and lupenone in R. arboretum; lauric acid, hexadecanethiol and cholesterol in E. japonica; ethyloctane, dicyclopentadiene, isocaproic acid, benzoic acid derivative, pimaric acid and carotene in S. lucida; oxalic acid, malonic acid, mevalonic acid, lanosterol, urosoloc acid and matairesinol in S. pyrifolia were not identified in other plants. (B) Summarizes the absolute count of different phytochemicals of the major organochemical species. The carboxylic acid group also includes fatty acid compounds. The ‘other’ group includes identified minor chemical species. Cumulatively, carboxylic acid species (53 nos.) followed by alcohol (27 nos.), fatty acids (17 nos.) and alkane hydrocarbons (15 nos.) were the most abundant chemical species identified. Three different aldehydes (nonanal, decanal and benzaldehyde) were identified only in R. arboretum. Levulinic acid (V. erubescens), lupenone (R. arboreum) and 2′,6′-dihydroxyacetophenone (S. pyrifolia) were the three ketone compounds identified.