拟南芥同源四倍体减数分裂过程的分子细胞学分析

doi:10.7525/j.issn.1673-5102.2016.03.006

植物研究 ›› 2016, Vol. 36 ›› Issue (3): 354-359.doi: 10.7525/j.issn.1673-5102.2016.03.006

拟南芥同源四倍体减数分裂过程的分子细胞学分析

李云玲, 田保明, 杨妍, 崔明珠, 郝志达, 位芳

郑州大学生命科学学院, 郑州 450001

收稿日期:2015-10-23 出版日期:2016-05-15 发布日期:2016-05-20
通讯作者: 位芳,E-mail:fangwei@zzu.edu.cn E-mail:fangwei@zzu.edu.cn
作者简介:李云玲(1989-),女,硕士研究生,主要从事植物分子细胞遗传学方面的研究。
基金资助:
NSFC-河南人才培养联合基金(U1204308);河南省教育厅高等学校重点科研项目(13A180437)

Molecular and Cytological analysis of Meiosis in Autotetraploid Arabidopsis thaliana

LI Yun-Ling, TIAN Bao-Ming, YANG Yan, CUI Ming-Zhu, HAO Zhi-Da, WEI Fang

School of Life Sciences, Zhengzhou University, Zhengzhou 450001

Received:2015-10-23 Online:2016-05-15 Published:2016-05-20

摘要/Abstract

摘要： 以拟南芥(Columbia生态型)二倍体(AA,2n=10)为材料,经0.2%秋水仙素处理和细胞学鉴定,成功获得拟南芥同源四倍体(AAAA,2n=20)。以二倍体为对照,通过对拟南芥同源四倍体减数分裂过程染色体行为的观察,以及减数分裂调控同源染色体联会与重组相关基因的定量PCR分析,研究结果表明,与二倍体相比,拟南芥同源四倍体叶片表皮细胞间气孔孔径显著增大,荚果变长,但气孔密度和结实率显著降低;在减数分裂过程中出现部分单价体和三价体,以及二价体和四价体等染色体配对构型;减数分裂期重组相关基因ZYP1表达水平降低,ASY1、DMC1、MRE11和SPO11-1表达水平均升高。因此,我们推断,伴随着多倍体化,与二倍体相比,多倍体植物减数分裂期染色体行为和相关基因表达都有一定改变,影响多倍体植物生殖发育以适应环境。

关键词: 拟南芥, 二倍体, 同源四倍体, 减数分裂, 染色体

Abstract: The diploid Arabidopsis thaliana(Columbia-0, 2n=10) was used to obtain autotetraploid plants(2n=20) after 0.2% colchicine treatment and cytological identification. Meiotic chromosome behaviors were comparatively observed in diploid and autotetraploid A.thaliana, and the meiosis-related genes were relatively quantified by Real-time PCR. The autotetraploid A.thaliana produced relatively larger stoma and fruits, but the stomatal density and the seed-set were significantly reduced. Some chromosomal configurations were also observed during meiosis involving the trivalents, univalents, bivalents and quadrivalents in autotetraploid plants. The expression of several meiosis-related genes including ASY1, DMC1, MRE11 and SPO11-1 were up-regulated in autotetraploids. Therefore, as autopolyploidization proceeds, plants may adapt themselves into environment by accompanying with phenotype changes owing to the altered chromosomal behaviors and gene expressions.

Key words: Arabidopsis thaliana, diploid, autotetraploid, meiosis, chromosome

中图分类号:

Q943

李云玲, 田保明, 杨妍, 崔明珠, 郝志达, 位芳. 拟南芥同源四倍体减数分裂过程的分子细胞学分析[J]. 植物研究, 2016, 36(3): 354-359.

LI Yun-Ling, TIAN Bao-Ming, YANG Yan, CUI Ming-Zhu, HAO Zhi-Da, WEI Fang. Molecular and Cytological analysis of Meiosis in Autotetraploid Arabidopsis thaliana[J]. Bulletin of Botanical Research, 2016, 36(3): 354-359.

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拟南芥同源四倍体减数分裂过程的分子细胞学分析

Molecular and Cytological analysis of Meiosis in Autotetraploid Arabidopsis thaliana

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