红莲型细胞质雄性不育性与线粒体渗透性转换

Honglian Cytoplasmic Male Sterility in Relation to Its Mitochondrial Permeability Transition

以水稻红莲型细胞质雄性不育(HL-CMS)的不育系粤泰A(YTA)、保持系粤泰B(YTB)以及杂种F1代红莲2号(HL2)的黄化苗为材料,研究了在不同pH及离子强度下线粒体渗透性转换(MPT)的发生及其差异。结果表明,YTA、YTB和HL2间MPT的发生均存在差别,不育系YTA线粒体渗透性转换孔(PTP)的开启与关闭对pH及离子强度的变化较保持系YTB和HL2敏感。HL2与YTA虽然具有相同的细胞质来源,但两者之间PTP及MPT的特性明显不同,前者MPT的变化与具有正常生理功能的YTB线粒体的PTP和MPT的发生特点与特性相似。这些说明红莲型水稻细胞质雄性不育的发生可能与其MPT的发生有关。

The paper reports that mitochondrial permeability transition (MPT) may exist in Honglian cytoplasmic male sterile (HL-CMS) rice.The results also showed that there are significant differences of MPT occurrence and characteristics among the sterile line,YuetaiA (YTA),maintainer line,YuetaiB (YTB),and the hybrid,Honglian Number 2 (HL2) derived from the cross of YTA×9311.The MPT of YTA is more sensitive than those of YTB and HL2 to changes of pH and ion density.Although HL2 has the same origin of CMS as that of YTA,and difference from the normal cytoplasm of YTB,the occurrence and characteristics of permeability transition pore (PTP) and MPT of HL2 are obvious different from YTA and much more similar to that of YTB.It is suggested that MPT might be involved in the abortive process of HL-CMS.