@entity2271 induces ectopic outgrowth in epidermal cells through cortical microtubule reorganization in XXXX .

@entity2272 @entity958 @entity2271
@entity2271 ( @entity2272 ) regulates seed maturation, germination and various stress responses in plants. The roles of @entity2272 in cellular growth and morphogenesis, however, remain to be explored. Here, we report that @entity2272 induces the ectopic outgrowth of epidermal cells in @entity958 . Seedlings of A. thaliana germinated and grown in the presence of @entity2272 developed ectopic protrusions in the epidermal cells of hypocotyls, petioles and cotyledons. One protrusion was formed in the middle of each epidermal cell. In the hypocotyl epidermis, two types of cell files are arranged alternately into non-stoma cell files and stoma cell files, ectopic protrusions being restricted to the non-stoma cell files. This suggests the presence of a difference in the degree of sensitivity to @entity2272 or in the capacity of cells to form protrusions between the two cell files. The ectopic outgrowth was suppressed in @entity2272 insensitive mutants, whereas it was enhanced in @entity2272 hypersensitive mutants. Interestingly, @entity2272 -induced ectopic outgrowth was also suppressed in mutants in which microtubule organization was compromised. Furthermore, cortical microtubules were disorganized and depolymerized by the @entity2272 treatment. These results suggest that @entity2272 signaling induces ectopic outgrowth in epidermal cells through microtubule reorganization.
