Physiological changes of fruits for 3 Canarium album cultivars during postharvest storage

ObjectiveThe fruit physiology changes of 3 Canarium album cultivars during postharvest storage were studied, and the storable cultivar was screened out, in order to provide reference basis for breeding superior cultivars of C. album. MethodTaking 3 Canarium album cultivars(Fengyu 1, Shenyang sweet, Yidianhong) from Chaoshan, Guangdong as tested materials, the physiological indicators including respiratory intensity, cell membrane permeability, peroxidase (POD) activity and polyphenol oxidase(PPO) activity, malondialdehyde(MDA) content were determined, and the weight loss rate and good fruit rate were determined every 2 days, when they were stored at room temperature(15-25 ℃) and relative humidity of 60%-80%. ResultAfter being stored at room temperature for 8 day , the good fruit rate of Yidianhong was still maintained at 98%, that of Fengyu 1 was only 50%. The respiratory peak of Fengyu 1 was on the 6th day during storage at room temperature, the Shenyang sweet and Yidianhong showed an increasing tendency, the respiratory peak had not appeared. The weight loss rate, cell membrane permeability and MDA content of all 3 C. album cultivars increased gradually during whole storage period, the POD activity increased first and then decreased and then increased. After being stored at room temperature for 8 d, the weight loss rate and POD activity of Shenyang sweet fruit were the lowest, and the cell membrane permeability and MDA content of Yidianhong fruit were the lowest. Three C. album cultivars were sorted by PPO activity, as follows: Fengyu 1>Shenyang sweet>Yidianhong. ConclusionAmong 3 cultivars(Fengyu 1, Shenyang sweet, Yidianhong), Yidianhong is the most suitable for storage, closely followed by Shenyang sweet. Therefore, Yidianhong and Shenyang sweet can be exported to non-producing areas, and Fengyu 1 should be sold in producing areas.