Plant cell walls: supramolecular assembly, signalling and stress
Plant cell walls: supramolecular assembly, signalling and stress
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DOI：
10.1007/s11224-009-9427-y
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发表时间：
2009-04-01
影响因子：
1.7
通讯作者：
Jarvis, Michael C.
中科院分区：
文献类型：
--
作者：
Jarvis, Michael C.
简要介绍了非禾本科植物初生细胞壁的结构，并介绍了其在为植物提供机械强度和保护植物免受微生物侵染方面的作用。多种信号机制涉及微生物病原体中聚糖酶释放的低聚糖，其中一些机制可能涉及成熟果实代谢的调节。有一些证据表明，细胞壁能够感知损伤或完整性丧失，并相应地将信号传递回细胞质。初代细胞壁必须结合机械和其他功能，以一种受控制的方式生长。最初用于描述木材变形的“分子魔术贴”模型的修改被用来预测载荷变形曲线，就像用洛克哈特方程描述的膨胀应力与生长之间的关系一样。预测生长的压力阈值并不需要假设酶的活性，尽管事实上酶的活性确实需要允许以通常观察到的速度生长。
The structure of the primary cell wall in non-graminaceous plants is briefly reviewed and its role in providing mechanical strength to the plant and protecting it from microbial infection are described. A variety of signalling mechanisms involve oligosaccharides released by glycanase enzymes from microbial pathogens, and some of the mechanisms may be implicated in the regulation of metabolism in ripening fruits. There is some evidence that cell walls are able to sense damage or loss of integrity and that signals can accordingly be passed back to the cytoplasm. Primary cell walls must combine the mechanical and other functions with the capacity to grow in a controlled way. A modification of the 'Molecular Velcro' model developed originally to describe deformation of wood is used to predict load-deformation curves like those described by the Lockhart equation for the relationship between turgor stress and growth. Predicting a stress threshold for growth does not require the assumption of enzyme activity, although in fact enzyme activity is indeed required to permit growth at the rates normally observed.