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Investigation of potential antibacterial action for postharvest copper treatments of cut Acacia holosericea

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Ratnayake, K., Joyce, D. C. and Webb, R. I. (2012) Investigation of potential antibacterial action for postharvest copper treatments of cut Acacia holosericea. Postharvest Biology and Technology, 70 . pp. 59-69. ISSN 09255214 (ISSN)

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Article Link: http://dx.doi.org/10.1016/j.postharvbio.2012.04.00...


The mechanisms of action of Cu 2+ in improving the longevity of cut flowers and foliage have not been elucidated. Possible antimicrobial action of Cu 2+ against stem end and vase solution colonising bacteria was investigated using Cu 2+ treatments optimised for cut Acacia holosericea A. Cunn. ex G. Don foliage stems. These treatments were a 5h pulse with 2.2mM Cu 2+ or a 0.5mM Cu 2+ vase solution versus a deionised water (no Cu 2+) control. Bacterial growth over time was assessed by a standard plate count agar technique and with scanning electron microscopy. Cu 2+ treatments significantly extended the cut foliage vase life. However, they did not have sustained antibacterial activity against stem end or vase solution colonising bacteria. Also, regular recutting of 1-2cm from the stem ends did not substantially improve either cut stem water relations or longevity. The positive effects of Cu 2+ treatments were unaffected by the repeated stem end recutting. It was concluded that the primary mechanism of Cu 2+ was not antibacterial. Moreover, naturally growing vase solution and stem end microbial populations had relatively insignificant effects on cut A. holosericea vase life. Research into alternative mechanisms of Cu 2+ is required. © 2012 Elsevier B.V.

Item Type:Article
Business groups:Horticulture and Forestry Science
Additional Information::doi 10.1016/j.postharvbio.2012.04.004 Language of Original Document: English Correspondence Address: Ratnayake, K.; Department of Horticulture and Landscape Gardening, Faculty of Agriculture and Plantation Management, Wayamba University, Makandura, Gonawila NWP, KG 60170, Sri Lanka; email: kamani.ratnayake@uqconnect.edu.au
Keywords:Acacia holosericea Bacteria Copper SEM Vase life Water relations Acacia Bacteria (microorganisms)
Subjects:Plant culture > Flowers and flower culture. Ornamental plants > Care and preparation of cut flowers and ornamental plants for market
Plant culture > Flowers and flower culture. Ornamental plants
Live Archive:03 Sep 2013 05:20
Last Modified:03 Sep 2021 16:49

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