John Schiefelbein

TL;DR: The transcriptional response to high salinity of different cell layers and developmental stages of the Arabidopsis root is characterized and it is found that transcriptional responses are highly constrained by developmental parameters.

TL;DR: A novel gene, WEREWOLF (WER), is described here that is required for position-dependent patterning of the epidermal cell types of Arabidopsis and is shown to regulate the position- dependent expression of the GLABRA2 homeobox gene, to interact with a bHLH protein, and to act in opposition to the CAPRICE MYB.

TL;DR: The results indicate that alterations in TTG activity cause developing epidermal cells to misinterpret their position and differentiate into inappropriate cell types, suggesting that, in wild-type roots, TTG provides, or responds to, positional signals to cause differentiating epidersmal cells that lie over cortical cells to adopt a hairless cell fate.

TL;DR: Results indicate that the GL2 homeodomain protein normally regulates a subset of the processes that occur during the differentiation of hairless epidermal cells of the Arabidopsis root, and appears to act in a cell-position-dependent manner to suppress hair formation in differentiating hairless cells.

TL;DR: The results suggest that the mutant is deficient in activity of a protein required to load phosphate into the xylem, suggesting that the phosphate deficiency is caused by a single nuclear recessive mutation at a locus designated pho1.