บทคัดย่องานวิจัย

หมวดหมู่ : ฐานข้อมูลงานวิจัย

1-Methylcyclopropene and storage temperature influence responses of Gala apple fruit to gamma irradiation.

Fan, X., and Mattheis, J. P.

Postharvest Biology and Technology. Volume 23, Issue 2, November 2001, Pages 143-151.

2001

บทคัดย่อ

1-Methylcyclopropene and storage temperature influence responses of 'Gala' apple fruit to gamma irradiation.

'Gala' apple (Malus domestica [Malus pumila]) fruit pre-treated with 0.5 micro l/litre 1-methylcyclopropene (MCP) or air (control) for 12 h at 20 deg C were exposed to gamma radiation at doses of 0, 0.44, 0.88 or 1.32 kGy at 23 deg C. The fruit were then stored at 20 deg C for 3 weeks or at 0 deg C for 8 weeks plus 7 days at 20 deg C. Fruit treated with MCP had higher firmness and titratable acidity (TA) than control fruit after storage at either temperature. During the post-irradiation storage at 20 deg C, irradiation promoted respiration of MCP-treated fruit throughout the 3-week period but had no consistent effect on respiration of control fruit. Fruit firmness and TA decreased with increased radiation dose after 3 weeks storage at 20 deg C regardless of MCP treatment. Compared to non-irradiated fruit, irradiated fruit had lower TA and similar firmness after storage at 0 deg C for 8 weeks plus 7 days at 20 deg C. Some irradiated fruit stored at 20 deg C for 3 weeks developed internal browning , and MCP-treated fruit had more injury than control fruit. Storage at 0 deg C after irradiation greatly reduced development of internal browning. Production of volatile esters, alcohols and 6-methyl-5-hepten-2-one by fruit stored at 0 deg C was reduced. The magnitude of reduction directly increased with radiation dose. It appears that some responses of apple fruit to gamma radiation are influenced by ethylene action and post-irradiation storage temperature.