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首页> 外文期刊>Protoplasma: An International Journal of Cell Biology >Not superficial, but on the surface
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Not superficial, but on the surface

机译：不是表面的，而是表面的

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摘要

When cells grow, their surface increases with the second power of the radius, their volume only with the third power. This leads to a progressive discrepancy between the supply of resources and their consumption. This discrepancy is adjusted by cell division, and during early evolution, multicellularity initially probably evolved as a strategy to increase in size and thus to escape the fate to be divoured by predators. However, the full potential of multicellularity was exploited only when the individual cells of the newborn organism began to assign different functions to individual members of the population. This implies that specific tasks have to be upregulated on cost of other functions that are downregulated and therefore must be compensated by complementary output from adjacent cells (P. M. Lintilhac, BioScience 49: 59–68, 1999). This division of labour is based on intensive signaling between neighbouring cells and/or the environment. The underlying “chemical negotiation” takes place at the external surface – at the plasma membrane, and (in case of plants) at the plasmodesmata and the cell wall. Three contributions to the present issue highlight these three domains of the external surface.
机译：当细胞生长时，其表面随半径的二次方增加，其体积仅随三次方而增加。这导致资源供应与消耗之间的逐步差异。这种差异是通过细胞分裂来调节的，在早期进化过程中，多细胞性最初可能是作为增加大小并逃避被掠食者吞噬的命运的策略而发展的。但是，只有当新生生物的单个细胞开始为种群的各个成员分配不同的功能时，才可以发挥多细胞作用的全部潜力。这意味着特定的任务必须根据其他功能的成本上调，而其他功能的成本下调，因此必须通过相邻细胞的互补输出来补偿（P. M. Lintilhac，BioScience 49：59-68，1999）。这种分工是基于相邻小区和/或环境之间的密集信令。潜在的“化学协商”发生在外表面，即质膜，以及（在植物的情况下）胞膜和细胞壁。对当前问题的三个贡献突出了外表面的这三个领域。

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