拟南芥 pi4kIIIβ1β2 双突变体水杨酸积累过度：水杨酸影响植物株高的又一个新例证。
The Arabidopsis pi4kIIIβ1β2 double mutant is salicylic acid-overaccumulating: a new example of salicylic acid influence on plant stature.
机构信息
a Department of Biochemistry and Microbiology; Institute of Chemical Technology Prague ; Prague , Czech Republic.
出版信息
Plant Signal Behav. 2014;9(12):e977210. doi: 10.4161/15592324.2014.977210.
Growth is the best visible sign of plant comfort. If plants are under stress, a difference in growth with control conditions can indicate that something is going wrong (or better). Phytohormones such as auxin, cytokinins, brassinosteroids or giberellins, are important growth regulators and their role in plant growth was extensively studied. On the other hand the role of salicylic acid (SA), a phytohormone commonly connected with plant defense responses, in plant growth is under-rated. However, studies with SA-overaccumulating mutants directly showed an influence of SA on plant growth. Recently we characterized an Arabidopsis SA-overaccumulating mutant impaired in phosphatidylinositol-4-kinases (pi4kIIIβ1β2). This mutant is dwarf. The crossing with mutants impaired in SA signaling revealed that pi4kIIIβ1β2 stunted rosette is due to high SA, while the short root length is not. This brings into evidence that upper and lower parts of the plants, even though they may share common phenotypes, are differently regulated.
生长是植物舒适的最佳可见标志。如果植物处于压力之下，与对照条件相比生长的差异可能表明出现了问题（或更好）。生长素、细胞分裂素、油菜素内酯或赤霉素等植物激素是重要的生长调节剂，它们在植物生长中的作用得到了广泛研究。另一方面，水杨酸（SA）的作用被低估了，SA 是一种与植物防御反应有关的植物激素。然而，具有 SA 过度积累突变体的研究直接表明 SA 对植物生长有影响。最近，我们对拟南芥中一个 SA 过度积累的突变体进行了特征描述，该突变体在磷脂酰肌醇-4-激酶（pi4kIIIβ1β2）中存在缺陷。该突变体矮小。与 SA 信号转导缺陷突变体的杂交表明，pi4kIIIβ1β2 矮化的莲座叶是由于高浓度的 SA，而短根长则不是。这表明植物的上部和下部，尽管它们可能具有共同的表型，但受到不同的调节。
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