Root hair development involves asymmetric cell division in Brachypodium distachyon and symmetric division in Oryza sativa

• DOI: 10.1111/j.1469-8137.2011.03839.x
• Publication Date: 2011-08-16T14:41:01Z
• Authors: Chul Min Kim; Liam Dolan
• Keywords: Brachypodium distachyon; Brachypodium; Root hair; Asymmetric cell division; Plant cell; Epidermis (zoology)

• The root epidermis of most angiosperms comprises hair (H) cells and nonhair (N) cells. H are shorter than N in grasses (Poaceae). aim this study was to determine the developmental basis for differences cell size Brachypodium distachyon Oryza sativa. We show that cytokinesis last division each epidermal file is asymmetric B. distachyon. smaller daughter becomes an larger forms cell. By contrast, does not occur during development O. sativa arise because there more expansion after initiation. different sizes mature result from asymmetry but rates hypothesize mechanism includes evolved among Pooideae or ancestors subfamily.