Hochholdinger Frank, Park Woong June, Sauer Michaela, Woll Katrin
Center for Plant Molecular Biology, Department of General Genetics, Eberhard-Karls-University Tübingen, Auf der Morgenstelle 28, 72076, Tübingen, Germany.
Trends Plant Sci. 2004 Jan;9(1):42-8. doi: 10.1016/j.tplants.2003.11.003.
Root development of Arabidopsis, Zea mays (maize) and Oryza sativa (rice) differs in both overall architecture and the anatomy of individual roots. In maize and rice, the post-embryonic shoot-borne root system becomes the major backbone of the root stock; in Arabidopsis, the embryonic root system formed by a simple primary root and its lateral roots remains dominant. Recently, several specific root mutants and root-specific genes have been identified and characterized in maize and rice. Interestingly, some of these mutants indicate that the formation of primary-, seminal-, crown- and lateral roots is regulated by alternative root-type-specific pathways. Further analyses of these unique pathways will contribute to the understanding of the complex molecular networks involved in cereal root formation.
拟南芥、玉米和水稻的根系发育在整体结构和单个根的解剖结构上均存在差异。在玉米和水稻中，胚后地上部着生的根系成为根茎的主要骨干；在拟南芥中，由单一主根及其侧根形成的胚根系统保持主导地位。最近，在玉米和水稻中已经鉴定并表征了几种特定的根突变体和根特异性基因。有趣的是，其中一些突变体表明，主根、胚根、冠根和侧根的形成受不同的根类型特异性途径调控。对这些独特途径的进一步分析将有助于理解参与谷类作物根系形成的复杂分子网络。
