缺乏动力相关蛋白2B的植物中胼胝质沉积增加依赖于抗白粉病4。
Increased callose deposition in plants lacking DYNAMIN-RELATED PROTEIN 2B is dependent upon POWDERY MILDEW RESISTANT 4.
作者信息
Leslie Michelle E, Rogers Sean W, Heese Antje
机构信息
a Division of Biochemistry, Interdisciplinary Plant Group, University of Missouri-Columbia , Columbia , MO , USA.
出版信息
Plant Signal Behav. 2016 Nov;11(11):e1244594. doi: 10.1080/15592324.2016.1244594.
Abstract
Callose deposition within the cell wall is a well-documented plant immune response to pathogenic organisms as well as to pathogen-/microbe- associated molecular patterns (P/MAMPs). However, the molecular mechanisms that modulate pathogen-induced callose deposition are less understood. We reported previously that Arabidopsis plants lacking the vesicle trafficking component DYNAMIN-RELATED PROTEIN 2B (DRP2B) display increased callose deposition in response to the PAMP flg22. Here, we show that increased number of flg22-induced callose deposits in drp2b leaves is fully dependent on the callose synthase POWDERY MILDEW RESISTANT 4 (PMR4). We propose that in addition to functioning in flg22-induced endocytosis of the plant receptor, FLAGELLIN SENSING 2, DRP2B may regulate the trafficking of proteins involved in callose synthesis, such as PMR4, and/or callose degradation.
摘要
细胞壁内胼胝质沉积是植物对病原生物以及病原体/微生物相关分子模式（P/MAMPs）的一种有充分记录的免疫反应。然而，调节病原体诱导的胼胝质沉积的分子机制尚不清楚。我们之前报道过，缺乏囊泡运输成分动力相关蛋白2B（DRP2B）的拟南芥植物在响应PAMP flg22时会表现出胼胝质沉积增加。在这里，我们表明drp2b叶片中flg22诱导的胼胝质沉积物数量增加完全依赖于胼胝质合酶抗白粉病4（PMR4）。我们提出，DRP2B除了在flg22诱导的植物受体FLAGELLIN SENSING 2的内吞作用中发挥作用外，还可能调节参与胼胝质合成（如PMR4）和/或胼胝质降解的蛋白质的运输。
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