Manipulating avocado fruit ripening with 1-methylcyclopropene

Adkins, Matthew F., Hofman, Peter J., Stubbings, Barbara A. and Macnish, Andrew J. (2005) Manipulating avocado fruit ripening with 1-methylcyclopropene. Postharvest Biology and Technology, 35 1: 33-42. doi:10.1016/j.postharvbio.2004.05.021

Author Adkins, Matthew F.
Hofman, Peter J.
Stubbings, Barbara A.
Macnish, Andrew J.
Title Manipulating avocado fruit ripening with 1-methylcyclopropene
Journal name Postharvest Biology and Technology   Check publisher's open access policy
ISSN 0925-5214
Publication date 2005
Sub-type Article (original research)
DOI 10.1016/j.postharvbio.2004.05.021
Volume 35
Issue 1
Start page 33
End page 42
Total pages 10
Editor I. B. Ferguson
R. P. Cavalieri
Place of publication Amsterdam
Publisher Elsevier Science Bv
Collection year 2005
Language eng
Subject C1
300304 Post Harvest Technologies
620205 Tropical fruit
Abstract Previous investigations with 1-methylcyclopropene (1-MCP) on avocado (Persea americana Mill.) fruit have focussed mainly on improving storage life by reducing the severity of disorders causing discolouration of the flesh. Development of 1-MCP and ethylene treatments, which also help control the time to reach the eating ripe stage, may confer additional practical benefits. In this context, the current study investigated the potential of 1-MCP to accurately manipulate ripening of non-stored 'Hass' avocado fruit by treatment before or after ethylene and at different times during ripening. To investigate this, 500 nL L-1 1-MCP was applied within 1 day after harvest, followed by ethylene 0-14 days after 1-MCP. In addition, fruit were treated with ethylene, then 1-MCP 0-8 days after ethylene. Treatment of fruit with 500 nL L-1 1-MCP for 18 h at 20 degreesC provided the maximum effect by increasing the days from harvest to ripe (DTR) from 8 (with no 1-MCP) to 20. Fruit treated with 500 nL L-1 1-MCP for 18 h at 20 degreesC remained insensitive to 100 muL L-1 ethylene applied between 0 and 14 days after 1-MCP for 24 h at 20 degreesC. Ripening of fruit exposed to 100 muL L-1 ethylene for 24 h at 20 degreesC could be delayed by up to 3.3 days by applying 500 nL L-1 1-MCP for 18 h at 20 degreesC up to 2 days after ethylene treatment. However, once the fruit started to soften (sprung) there was little effect of 1-MCP on DTR, compared with no 1-MCP. 1-MCP treatment was associated with increased severity of body rots (caused mainly by Colletotrichum spp.) and stem-end rots (caused mainly by Dothiorella spp.), which was likely due to the increased DTR in these treatments. Significant differences in disease severity were found between orchards (replications), with replicates with low disease severity being less affected by 1-MCP treatment. These results indicate that 1-MCP can delay ripening, but careful sourcing of fruit is required to reduce the risk of diseases in ripe fruit. There is some capacity to delay ripening using 1-MCP after ethylene. There is little potential to control ripening using ethylene after treatment with 500 nL L-1 1-1-MCP, but lower concentrations may be more effective. (C) 2004 Elsevier B.V. All rights reserved.
Keyword Avocado
Food Science & Technology
Banana Fruit
Ethylene Responses
Q-Index Code C1

Document type: Journal Article
Sub-type: Article (original research)
Collections: 2006 Higher Education Research Data Collection
School of Agriculture and Food Sciences
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Citation counts: TR Web of Science Citation Count  Cited 37 times in Thomson Reuters Web of Science Article | Citations
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Created: Wed, 15 Aug 2007, 06:25:48 EST