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首页> 外文期刊>Journal of Experimental Botany >Light can rescue auxin-dependent synchrony of cell division in a tobacco cell line.
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Light can rescue auxin-dependent synchrony of cell division in a tobacco cell line.

机译：光可以挽救烟草细胞系中生长素依赖性细胞分裂的同步性。

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摘要

Pattern formation in plants has to cope with ambient variability and therefore must integrate environmental cues such as light. Synchrony of cell divisions was previously observed in cell files of tobacco suspension cultures, which represents a simple case of pattern formation. To develop cellular approaches for light-dependent patterning, light-responsive tobacco cell lines were screened from the cell line Nicotiana tabacum L. cv. Virginia Bright Italia 0 (VBI-0). The light responsive and auxin-autonomous cell line VBI-3 was isolated. As in the progenitor line VBI-0, cell divisions are synchronized in VBI-3 during exponential growth phase. This synchrony can be inhibited by 1-N-naphthylphthalamic acid, an auxin transport inhibitor, and this process was accompanied by the disassembly of actin filaments. However, the synchrony could be rescued when the cells were cultured under white light or with exogenous indolyl-3-acetic acid. The rescue was most efficient for continuous far-red light followed by continuous blue light, whereas continuous red light was least effective. These findings are discussed in the context of phytochrome-induced auxin biosynthesis and auxin-dependent synchrony of cell division.
机译：植物中图案的形成必须应对环境的变化，因此必须整合环境线索，例如光线。先前在烟草悬浮培养的细胞文件中观察到细胞分裂的同步，这代表了模式形成的简单情况。为了开发用于光依赖性图案形成的细胞方法，从烟草系Nicotiana tabacum L.cv中筛选出光响应性烟草细胞系。弗吉尼亚明亮意大利0（VBI-0）。分离出光反应性和生长素自主细胞系VBI-3。与祖细胞系VBI-0一样，在指数生长期，细胞分裂在VBI-3中同步。这种同步性可以被生长素转运抑制剂1-N-萘基邻苯二酸抑制，该过程伴随着肌动蛋白丝的分解。但是，当细胞在白光下或与外源吲哚基-3-乙酸一起培养时，可以恢复同步性。救援对于连续的远红光接着是连续的蓝光最有效，而连续的红光效果最差。这些发现是在植物色素诱导的植物生长素生物合成和细胞分裂相关植物生长素依赖性同步的背景下讨论的。

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