Fig. 4

Overexpression of GhWRKY1-like conferred drought tolerance in Arabidopsis. A The phenotypes of GhWRKY1-like transgenic lines tolerant to drought stress. B The size of WT and GhWRKY1-like transgenic lines after 20 days without watering. C The fresh weight of WT and GhWRKY1-like transgenic lines after 20 days without watering. Values are means ± SD; n = 18. In each column, values not followed by the same letters are significantly different based on Tukey’s multiple comparison test (P < 0.05). D The MAD content of WT and GhWRKY1-like transgenic lines after 20 days without watering. Values are means ± SD; n = 6. Comparisons were performed with Student’s t test. **, P < 0.01. E The proline content of WT and GhWRKY1-like transgenic lines after 20 days without watering. Values are means ± SD; n = 6. Comparisons were performed with Student’s t test. **, P < 0.01