The ethylene pathway contributes to root hair elongation induced by the beneficial bacteria Phyllobacterium brassicacearum STM196
The ethylene pathway contributes to root hair elongation induced by the beneficial bacteria Phyllobacterium brassicacearum STM196
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DOI：
10.1016/j.plantsci.2012.03.008
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发表时间：
2012-07-01
期刊：
影响因子：
5.2
通讯作者：
Desbrosses, Guilhem
中科院分区：
文献类型：
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作者：
Galland, Marc;Gamet, Lydia;Desbrosses, Guilhem
在拟南芥根中，一些表皮细胞分化为根毛细胞。生长素调节根毛的位置，而乙烯控制细胞的伸长。芸苔叶杆菌 STM196 是一种从田间种植的油菜根中分离出来的促进植物生长的根际细菌 (PGPR) 的有益菌株，可刺激拟南芥幼苗的根毛伸长。我们研究了乙烯在根毛细胞对 STM196 接种的反应中的作用。虽然我们无法检测到乙烯生物合成的显着增加，但我们可以检测到乙烯信号通路的轻微激活。与此一致的是，对受乙烯途径影响的突变体和转基因品系的根毛伸长反应进行的详尽调查显示，根毛对STM196的敏感性不同。我们认为局部乙烯排放有助于 STM196 诱导的根毛伸长。 (C) 2012 Elsevier Ireland Ltd. 保留所有权利。
In Arabidopsis roots, some epidermal cells differentiate into root hair cells. Auxin regulates root hair positioning, while ethylene controls cell elongation. Phyllobacterium brassicacearum STM196, a beneficial strain of plant growth promoting rhizobacteria (PGPR) isolated from the roots of field-grown oilseed rape, stimulates root hair elongation in Arabidopsis thaliana seedlings. We investigated the role of ethylene in the response of root hair cells to STM196 inoculation. While we could not detect a significant increase in ethylene biosynthesis, we could detect a slight activation of the ethylene signalling pathway. Consistent with this, an exhaustive survey of the root hair elongation response of mutants and transgenic lines affected in the ethylene pathway showed contrasting root hair sensitivities to STM196. We propose that local ethylene emission contributes to STM196-induceed root hair elongation. (C) 2012 Elsevier Ireland Ltd. All rights reserved.