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Changes in growth parameters (A–D), chlorophyll (E,F) and proline (G) content of grafted watermelon seedlings grown under drought stress during the progressive treatment time. Each bar represents the mean ± SD of five biological replicates in growth parameters, and three replicates in chlorophyll and proline content. Different letters within a figure indicate a significant difference at p < 0.05 by Duncan’s multiple range test. RWC: relative water content.
