Class 1 KNOX Gene Expression Supports the Selaginella Rhizophore Concept
Class 1 KNOX Gene Expression Supports the Selaginella Rhizophore Concept
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DOI：
10.1007/s12374-010-9113-z
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发表时间：
2010-08-01
影响因子：
2.9
通讯作者：
Ito, Motomi
中科院分区：
文献类型：
--
作者：
Kawai, Junko;Tanabe, Yoichi;Ito, Motomi
穗苔的特点是独特的生根侧生根茎以及石松小叶。 Imaichi 和 Kato (Bot Mag Tokyo 102:369-380, 1989; Am J Bot 78:1694-1703, 1991)揭示了根茎的外源发育过程与内源根的发育过程明显不同，认为轴器官可以与包括根和茎在内的其他基本器官协调，并论证了“根茎概念”。在本文中，我们报告了穗苔卷柏 1 类 KNOX 基因 SuKNOX1 在根茎中的表达模式。我们发现 SuKNOX1 mRNA 专门积累在根茎尖端以及茎尖，但不在根尖。这一结果在分子水平上支持了“根茎概念”。
The spikemoss is marked by the unique root-producing pleurogeous rhizophore as well as the lycophytic microphyll. Imaichi and Kato (Bot Mag Tokyo 102:369-380, 1989; Am J Bot 78:1694-1703, 1991) revealed that the exogenous developmental process in the rhizophore is clearly distinguishable from the developmental process in the endogenous root, argued that the axial organ could be coordinate with other fundamental organs including the root and stem, and demonstrated the "rhizophore concept." In this paper, we report on the expression pattern of the spikemoss Selaginella class 1 KNOX gene, SuKNOX1, in the rhizophore. We show that the SuKNOX1 mRNA is specifically accumulated at the tip of the rhizophore as well as the shoot apical apex, but not in the root tip. This result supports the "rhizophore concept" at the molecular level.