Disruption of auxin transport is associated with aberrant leaf development in maize
Disruption of auxin transport is associated with aberrant leaf development in maize
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DOI：
10.1104/pp.121.4.1163
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发表时间：
1999-12-01
期刊：
影响因子：
7.4
通讯作者：
Langdale, JA
中科院分区：
文献类型：
--
作者：
Tsiantis, M;Brown, MIN;Langdale, JA
尽管最近的进展，在高等植物的芽形态发生的机制只被部分理解。经典的生理学研究表明，植物生长调节剂生长素的梯度可能在控制芽的组织分化中起作用。最近的分子遗传学研究也发现knotted 1 like homeobox（knox）基因是芽发育的重要调控基因。玉米（Zea mays L.）突变体粗糙鞘2（rs 2）显示至少三个knox基因的异位表达，并因此调节一系列茎和叶表型，包括异常维管发育、舌移位和侏儒症（R. Schneeberger，M. Tsiantis，M. Freeling，J.A. Langdale [1998] Development 125：2857-2865）。在这份报告中，我们表明，rs 2突变体也显示减少极性生长素运输的拍摄。我们还表明，发芽的野生型玉米幼苗已知抑制极性生长素运输模仿方面的rs 2突变体表型。阐述在走廊处理的植物的表型是不相关的异位KNOX蛋白的积累。
Despite recent progress, the mechanisms governing shoot morphogenesis in higher plants are only partially understood. Classical physiological studies have suggested that gradients of the plant growth regulator auxin may play a role in controlling tissue differentiation in shoots. More recent molecular genetic studies have also identified knotted1 like homeobox (knox) genes as important regulators of shoot development. The maize (Zea mays L.) mutant rough sheath2 (rs2) displays ectopic expression of at least three knox genes and consequently conditions a range of shoot and leaf phenotypes, including aberrant vascular development, ligular displacements, and dwarfism (R. Schneeberger, M. Tsiantis, M. Freeling, J.A. Langdale [1998] Development 125: 2857-2865). In this report, we show that rs2 mutants also display decreased polar auxin transport in the shoot. We also demonstrate that germination of wild-type maize seedlings on agents known to inhibit polar auxin transport mimics aspects of the rs2 mutant phenotype. The phenotype elaborated in inhibitor-treated plants is not correlated with ectopic KNOX protein accumulation.