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拟南芥茎尖细胞分裂的同步与花起始的关系。

Synchronisation of cell division in the shoot apex of Silene in relation to flower initiation.

机构信息

Department of Botany, University of Edinburgh, Mayfield Road, EH9 3JH, Edinburgh, U.K..

出版信息

Planta. 1979 Jan;145(2):151-7. doi: 10.1007/BF00388711.

DOI:10.1007/BF00388711
PMID:24317670
Abstract

In plants of Silene coeli-rosa, induced to flower by 7 LD, synchronisation of cell division in 20 per cent or more of the cells in the shoot apical dome was found on the 8th and 9th days after the beginning of induction, during the plastochron before sepal initiation. Synchronisation was inferred from the changes in the proportions of cells with the 2C and 4C amounts of DNA, and changes in mitotic index and labelling index. From the peaks of mitotic index a cell cycle of 10 h was measured for the synchronised cells, half that of cells in the apices of uninduced plants in short days. The faster cell cycle and synchronisation in the induced plants was associated with a shortening, of both G1 and G2, suggesting two control points, while S and M remained unchanged. These results are compared with those from other plants in which synchronisation occurs at the beginning rather than the end of evocation.

摘要

在被 7LD 诱导开花的天蓝矢车菊植物中,在诱导开始后的第 8 天和第 9 天,在萼片起始之前的光周期中,发现 20%或更多的茎尖顶端细胞的细胞分裂同步。通过细胞 DNA 含量为 2C 和 4C 的比例变化、有丝分裂指数和标记指数的变化来推断同步。从有丝分裂指数的峰值可以测量出同步细胞的细胞周期为 10 小时,是短日照未诱导植物根尖细胞周期的一半。诱导植物中更快的细胞周期和同步与 G1 和 G2 的缩短有关,这表明存在两个控制点,而 S 和 M 保持不变。这些结果与其他在激发开始而不是结束时发生同步的植物的结果进行了比较。

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本文引用的文献

1
The cell cycle in vegetative and floral shoot meristems measured by a double labelling technique.利用双重标记技术测量营养和花分生组织的细胞周期。
Planta. 1975 Jan;126(1):37-43. doi: 10.1007/BF00389358.
2
Early effects of floral induction on cell division in the shoot apex of Silene.百合科植物花诱导对茎尖细胞分裂的早期影响。
Planta. 1978 Jan;139(3):273-9. doi: 10.1007/BF00388641.
3
Interacting processes in vegetative development and in the transition to flowering at the shoot apex.营养生长过程以及茎尖向开花转变过程中的相互作用。
花转变过程中油菜薹茎尖分生组织细胞周期时程和生长分数的变化。
Planta. 1987 Jan;170(1):55-9. doi: 10.1007/BF00392381.
4
A yeast mitotic activator sensitises the shoot apical meristem to become floral in day-neutral tobacco.酵母有丝分裂激活因子使顶芽分生组织对成为花敏感在日中性烟草中。
Planta. 2013 Oct;238(4):793-806. doi: 10.1007/s00425-013-1931-z. Epub 2013 Jul 30.
5
Cell division and morphological changes in the shoot apex of Arabidopsis thaliana during floral transition.拟南芥花发育转变过程中茎尖的细胞分裂和形态变化
Ann Bot. 2003 Apr;91(5):571-6. doi: 10.1093/aob/mcg053.
6
The pattern of histone H4 expression in the tomato shoot apex changes during development.番茄茎尖中组蛋白H4的表达模式在发育过程中会发生变化。
Planta. 1994;192(1):69-74. doi: 10.1007/BF00198694.
7
Plant and organ development.植物与器官发育
Plant Mol Biol. 1992 May;19(1):51-68. doi: 10.1007/BF00015606.
Symp Soc Exp Biol. 1977;31:221-50.