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Comparison of respiratory pathways of CMS and its maintainer rice ( Oryza sativa L.)

Abstract

The respiration in panicle, leaf and anther of the cytoplasmic male sterile (CMS) rice Zhenshan 97A and in those of its maintainer fertile Zhenshan 97B was compared. The results showed that total respiratory rate (Vt) and the rate of alternative respiration (Valt) and activities of cytochrome oxidase (COD), malate dehydrogenase (MDH) and 6-phosphoglucose dehydrogenase (6-PGDH) in the anther of the sterile line were lower than those in the fertile line; but such differences were not found between the leaves of the sterile line and the fertile line, and only the activity of 6-PGDH was lower in the panicle of the sterile line than that of fertile line. 70% of Vt in the leaves and the panicles of the CMS line and its maintainer line was inhibited by malonic acid, but only 30% of Vt (apart from that of the panicle of the CMS line, which was 24%) was inhibited by Na_(3)PO_(4).

Key words: Respiratory pathway;Cytoplasmic male sterility;Rice

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Citing This Article：

. Comparison of respiratory pathways of CMS and its maintainer rice ( Oryza sativa L.). Acta Physiol Sin 1998; 50 (1): (in Chinese with English abstract).