Fig. 4From: Widely targeted analysis of metabolomic changes of Cucumis sativus induced by cucurbit chlorotic yellows virusHierarchical cluster analysis 7H VS 7Â V (a), 7QD VS 7Â V (b), 15H VS 15Â V (c), 15QD VS 15Â V (d). The ordinate shows the relative content of different class of metabolites. The green color indicates the low content, while the red color means high content. The information of metabolites can be referred in Table S1Back to article page