Marzec Marek, Melzer Michael, Szarejko Iwona
Department of Genetics; Faculty of Biology and Environmental Protection; University of Silesia; Katowice, Poland.
Department of Physiology and Cell Biology; Leibniz Institute of Plant Genetics and Crop Plant Research (IPK); Gatersleben, Germany.
Plant Signal Behav. 2014;9(1):e27972. doi: 10.4161/psb.27972. Epub 2014 Feb 12.
In the last century, the mechanism for establishing the root epidermal pattern in grasses was proposed as a differentiating trait that can be used in taxonomic studies and as a useful tool to indicate the relationships between genera. However, knowledge about root hair differentiation in monocots is still scarce. During the last few years, this process has been studied intensively, mainly based on genetics and histological studies. A histological analysis of the root epidermis pattern composed from root hairs (trichoblasts) and non-root hair cells (atrichoblasts), as well as observations of the mechanism of the establishment of this pattern allowed 2 different methods of epidermal cell specialization in monocots to be precisely described. Additionally, a recently published paper describing root hair development in barley shed new light on the evolutionary context of the mechanism of root epidermis cell specialization, which is discussed in the presented work.
在上个世纪，人们提出了禾本科植物根表皮模式的建立机制，作为一种可用于分类学研究的鉴别特征，以及一种指示属间关系的有用工具。然而，关于单子叶植物根毛分化的知识仍然匮乏。在过去几年中，这一过程主要基于遗传学和组织学研究进行了深入研究。对由根毛（毛细胞）和非根毛细胞（无毛细胞）组成的根表皮模式进行组织学分析，以及对该模式建立机制的观察，使得能够精确描述单子叶植物表皮细胞特化的两种不同方法。此外，最近发表的一篇描述大麦根毛发育的论文为根表皮细胞特化机制的进化背景提供了新的线索，本文将对此进行讨论。
