Changes of Organic Acid Synthetase Activity during Fruit Development of Navel Orange (Citrus sinesis Osbeck)

ACTA HORTICULTURAE SINICA ›› 2001, Vol. 28 ›› Issue (2): 161-163.

• 研究报告 • Previous Articles Next Articles

Changes of Organic Acid Synthetase Activity during Fruit Development of Navel Orange (Citrus sinesis Osbeck) 　

Wen Tao¹, Xiong Qing’e¹, Zeng Weiguang², and Liu Yuanpeng²

(¹Agriculture College , Sichuan Agricultural University , Ya’an 625014;² Forestry Horticulture College , Sichuan Agricultural University , Ya’an 625014)

Received:1900-01-01 Revised:1900-01-01 Online:2001-04-25 Published:2001-04-25

Abstract

Abstract: Using Robertson Navel (madarin rootstock ten years) as a testing material , the activity variance of enzyme related to organic acid metabolism and its relationship with the organic acid accumulation were studied. The result shows : There is a significantly positive correlation between the activity of Citrate synthase ( CS) or Phosphoenolpyruvate carboxylase (PEPC) and organic acid , Their correlation coefficient ( r) are equal to 0. 916 0 and
0. 877 9 respectively. This not only proves that CO₂ fixation is a main pathway of organic acid synthesis in Navel orange fruit ; but also proves that CS and PEPC are the key enzymes of organic acid synthesis , and efficiently inhibiting CS and PEPC activity could reduce the organic acid content of orange fruit.

Key words: Navel orange (Citrus sinesis Osbeck), Fruit, Organic acid, Citrate synthase (CS), Phosphoenolpyruvate carboxylase (PEPC)

CLC Number:

Wen Tao;Xiong Qing’e;Zeng Weiguang;and Liu Yuanpeng. Changes of Organic Acid Synthetase Activity during Fruit Development of Navel Orange (Citrus sinesis Osbeck) 　[J]. ACTA HORTICULTURAE SINICA, 2001, 28(2): 161-163.

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Changes of Organic Acid Synthetase Activity during Fruit Development of Navel Orange (Citrus sinesis Osbeck)

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