《植物生理学报》 2014, 50(6): 823-828

玉米CMS-C不育系及其保持系线粒体膜通透性的比较分析

汪静, 徐浩, 王继玥, 张艳花, 荣廷昭, 曹墨菊*

四川农业大学玉米研究所/农业部西南玉米生物学与遗传育种重点实验室, 成都611130

通信作者：曹墨菊；E-mail: caomj@sicau.edu.cn；Tel: 15680813291

摘　要：

为了解玉米CMS-C相关不同育性材料雄穗线粒体膜通透性表现特征, 本文以玉米细胞质雄性不育系C48-2、保持系N48-2和育性恢复F₁ (C48-2×18-599白)雄穗为材料, 测定了线粒体膜相关生理指标。结果发现, 从花粉母细胞时期到双核期C48-2雄穗线粒体膜吸光度、膜电位荧光强度、Ca²⁺含量和Cyt c/a比值下降, MDA含量上升, 且各指标均在单核期和双核期与N48-2和F₁ (C48-2×18-599白)有显著差异。

关键词：玉米; CMS; 线粒体; 膜通透性

收稿：2014-01-03   修定：2014-04-09

资助：四川农业大学学科建设双支计划。

Comparative Analysis of Mitochondrial Membrane Permeability between Maize CMS-C Sterile Line and Its Maintainer Line

WANG Jing, XU Hao, WANG Ji-Yue, ZHANG Yan-Hua, RONG Ting-Zhao , CAO Mo-Ju*

Maize Research Institute of Sichuan Agricultural University/Key Laboratory of Biology and Genetic Improvement of Maize in Southwest Region, Ministry of Agriculture, Chengdu 611130, China

Corresponding author: CAO Mo-Ju; E-mail: caomj@sicau.edu.cn; Tel: 15680813291

Abstract:

In this study, in order to investigate the performance characteristic of mitochondrial membrane permeability in different fertility materials related to maize CMS-C, the physiological indexes of mitochondrial membrane were determined by using the tassels of sterile line C48-2, maintainer line N48-2 and fertility restored F1<.sub> (C48-2×18-599 white) as materials. The results indicated that membrane absorbance, membrane potential fluorescence intensity, Ca²⁺ content and Cyt c/a ratio decreased, but MDA content increased in the mitochondria of C48-2 tassels, and these indexes were significantly different with those of N48-2 and F₁ (C48-2×18- 599 white) at uninucleate stage and binucleate stage.

Key words: maize; CMS (cytoplasmic male sterility); mitochondrion; membrane permeability

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