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首页> 外文期刊>Protoplasma: An International Journal of Cell Biology >On the mechanism of callose synthesis induction by metal ions in onion epidermal cells
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On the mechanism of callose synthesis induction by metal ions in onion epidermal cells

机译:金属离子诱导洋葱表皮细胞愈伤组织合成的机理

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Metal ions induce the synthesis of callose in Allium cepa epidermal cells. Callose is deposited as single knoblike local accumulations, aggregates of knobs, or furrowed clusters tightly attached to the cell wall. The most effective metal is copper, it induces callose formation at micromolar concentrations. Agents acting on inositolphosphate metabolism, phospholipase inhibitors, calcium channel inhibitors, modulators of cytoplasmic calcium, or receptor antagonists influence callose synthesis. It is concluded that metal ions, especially Cu2+, initiate a signal transduction chain by activation of phospholipases and generation of mositol 1,4,5-trisphosphate, and that caliose synthesis is a cellular defence reaction caused by the disturbance of intracellular calcium homeostasis. [References: 47]
机译:金属离子诱导洋葱头皮表皮细胞中愈伤组织的合成。 ose质以单个瘤状局部聚集物,瘤状聚集物或紧密附着在细胞壁上的沟状簇的形式沉积。最有效的金属是铜,它以微摩尔浓度诱导concentrations糖的形成。影响肌醇磷酸代谢的物质,磷脂酶抑制剂,钙通道抑制剂,细胞质钙调节剂或受体拮抗剂会影响call的合成。结论是金属离子,特别是Cu2 +,通过激活磷脂酶和生成1,4,5-三磷酸mositol来启动信号转导链,而直链淀粉的合成是细胞内钙动态平衡紊乱引起的细胞防御反应。 [参考:47]

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