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Summary effects (as natural logs, ln R) and 95% confidence intervals (CIs) for the influence of CPA1 overexpression on root length in plants exposed to NaCl. The impacts of nine moderator variables on the magnitude of the treatment effect are portrayed (a–i; gene number not analysed due to insufficient studies). Category lists levels of each moderator. Change refers to raw percentage increase in root length induced by overexpression of CPA1.
