Figure 2.

Root hair phenotypes of the act2-1 mutant and wild-type Arabidopsis plants. Root hairs of act2-1/act2-1 mutants (a) are shorter than those of wild type (b), when grown on Phytagel plates in Murashige and Skoog salts without Suc. When the same medium is supplemented with 1% (w/v) Suc (c–f), the act2-1/act2-1 mutant displays distinctive bulbous root hairs that are typically pear-shaped with occasional branching (c–e), whereas wild-type plants have long and straight root hairs (f). Bars in the dark field images (a–c, e and f) and bright field image (d) = 50 μm.