Studies on the Relationship of the Development of Bitter Pit in Apple Fruits with the Contents of Calcium and Magnesium and the Activities of Antioxidant Enzymes

ACTA HORTICULTURAE SINICA ›› 2001, Vol. 28 ›› Issue (3): 200-205.

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Studies on the Relationship of the Development of Bitter Pit in Apple Fruits with the Contents of Calcium and Magnesium and the Activities of Antioxidant Enzymes

Wang Liangju, Jiang Weibing, He Qifeng, and Fan Huangbin

(College of Horticulture , Nanjing Agricultural University , Nanjing 210095)

Received:1900-01-01 Revised:1900-01-01 Online:2001-06-25 Published:2001-06-25

Abstract

Abstract: The calcium contents in all parts of bitter pit apples were significantly lower than that of the sound ones , but only the contents of magnesium at the outer cortex significantly higher than the sound ones. The activities of superoxide dismutase (SOD) , peroxidase ( POX) , catalase (CAT)
and ascorbate specific peroxidase (APX) in the pitted fruits were significantly lower than that of the sound. Vacuum infiltration of apples with CaCl₂ 100 mmol/ L increased activities of the above antioxi dant enzymes , and the treatment of MgCl₂ decreased the activities of POX, APX and CAT , implying
the activities of these three enzymes were regulated by calcium. The contents of malonaldehyde and the relative conductivity were higher in bitter pit apple fruits , which showed that the peroxidation of membrane might be the important reason of the physiological disorder in apple with lower level of calcium.

Key words: Apple, Bitter pit, Calcium, Magnesium, Antioxidant enzyme

CLC Number:

Wang Liangju;Jiang Weibing;He Qifeng;and Fan Huangbin. Studies on the Relationship of the Development of Bitter Pit in Apple Fruits with the Contents of Calcium and Magnesium and the Activities of Antioxidant Enzymes[J]. ACTA HORTICULTURAE SINICA, 2001, 28(3): 200-205.

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Studies on the Relationship of the Development of Bitter Pit in Apple Fruits with the Contents of Calcium and Magnesium and the Activities of Antioxidant Enzymes

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