Effects of active modified atmosphere packaging (MAP) on carbohydrates contents and quality in potted carnations (Dianthus caryophyllus)
K. Yamane, C. Burana, W. Ohira and Y. Yamaki
Book of Abstracts.International Conference on Quality Management in Supply Chains of Ornamentals. 21-24 February, 2012. Golden Tulip Sovereign Hotel, Bangkok, Thailand.
2012
บทคัดย่อ
Quality of potted carnation is often lowered by unfavorable environmental conditions during transportation and under consumer’s residents. Modified atmosphere packaging (MAP) during simulated shipment for 48 h slightly increased number of open florets in potted carnation. However, it took more than 24 h to attain optimum concentration of CO2 and O2. In this study, we applied active MAP to potted carnation ‘Scarlet’ plants. Plants were placed in polyethylene bags of 0.05 mm thickness and held at 20 ˚C for 48 h under dark condition (i.e., passive MAP). O2 concentration was lowered to 10 % and CO2 increased to 2.8% by using 5.16% CO2 in N2 gas at the start of MAP (i.e., active MAP). During the MAP, 0 or 0.1 μL L-1of 1-methylcyclopropene (1-MCP) was treated. Then the quality of potted plants was evaluated under continuous light of PPFD 15 μmol m-2 s-1. After 48 h of passive and active MAP, O2 concentration dropped to 17 and 7 %; CO2 concentration rised to 3 % and 3.7%, respectively. Ethylene concentration was higher in the 1-MCP treated bags. Active MAP treatment slightly delayed opening of florets and tended to increase the number of open florets 4 days after treatment (DAT). Active MAP tended to increase dry weight and soluble carbohydrates, especially pinitol, in the leaves. 1-MCP delayed the peaks of floret wilting from 6 to 10 DAT. Combined treatment of active MAP and 1-MCP significantly increased the number of open florets. These results suggested that active MAP plus 1-MCP treatment alleviated loss of carbohydrates and suppressed ethylene action, and thus improved quality of potted carnations.