Number of vascular bundles and conduits in wild-type and es1-1 plants. A, Number of vascular bundles in cv NPB plants. B, Number of vascular bundles in es1-1 plants. C, Comparison of the number of vascular bundles between cv NPB and es1-1 plants. D, Number of conduits in cv NPB plants. E, Number of conduits in es1-1 plants. F, Comparison of the number of conduits between cv NPB and es1-1 plants. G, Detection of the water potential value in the wild type and es1-1. The relative water potential value in different tissues at the seedling stage of the wild type and es1-1 was analyzed with the WP4-T Dewpoint PotentiaMeter (Decagon Devices, Inc.). The results are given as means of three independent assays, and error bars indicate sd. Asterisks indicate significance at the level of 5% (*) and 1% (**).