dc.contributor.author | Owino, W.O. | |
dc.contributor.author | Gemma, H. | |
dc.contributor.author | Hutchnison, M.J. | |
dc.contributor.author | Githiga, R.W. | |
dc.contributor.author | Ambuko, J. | |
dc.date.accessioned | 2013-03-15T12:38:21Z | |
dc.date.issued | 2012 | |
dc.identifier.uri | http://hdl.handle.net/11295/14154 | |
dc.description.abstract | 1-Methylcyclopropene (1-MCP) is one of the postharvest technologies employed in postharvest
systems to extend the shelf life of perishable commodities and minimize postharvest losses.
Efficacy of 1-MCP is affected by various preharvest factors including species, variety and
maturity stage of the commodities. In the present study, two commercial mango varieties,
‘Tommy Atkins’ and ‘Apple Mango’ were harvested to two maturity stages. Flesh color and
shoulder position were the maturity indices used to define the two stages as stage 1 (mature
green) and 2 (advanced maturity). Within 24 hours of harvesting from a commercial farm, a
homogenous sample of fruits of both varieties were subjected to 1-MCP at 1 ppm for a duration
of 24 hours and then allowed to ripen at ambient room conditions in comparison to untreated
controls. A random sample of 5 fruits was taken every two days for determination of ethylene
evolution and respiration rate until the end of storage, defined by marketability of the fruits.
Sampling for other ripening-related physical and biochemical changes including firmness,
cumulative weight loss, color (hue angle), total soluble solids (0brix) and titratable acidity was
done every 3 days until the end of the storage period. The results showed no varietal differences
in response to 1-MCP between ‘Tommy Atkins’ and ‘Apple mango’. However, the response to
1-MCP treatment was significantly affected by the stage of maturity. Fruits harvested at stage 1
showed significant 1-MCP treatment effect, while no treatment effect was evident in fruits
harvested at stage 2. In both varieties, 1-MCP treated fruits (stage 1) had significantly lower
respiration rates with a 3 to 4-day lag to the respiratory climacteric peak compared to untreated
controls. Further, the flesh of 1-MCP treated fruits remained firmer and retained a higher hue
angle throughout the observation period in both varieties. 1-MCP treatment also delayed other
ripening related biochemical changes as evidenced by lower 0brix and higher titratable acidity in
treated fruits. The results show the efficacy of 1-MCP in prolonging the postharvest shelf life of
the two varieties of mango fruits. However, this effect was significantly affected by the stage of
maturity of the fruits which should be considered while designing 1-MCP treatment regimes. | en |
dc.language.iso | en | en |
dc.subject | Tommy Atkins, Apple mango, 1-Methylcyclopropene, Postharvest, Quality, Maturity | en |
dc.title | Effect of maturity stage and variety on the efficacy of 1-mcp treatments in mango fruits | en |
dc.type | Article | en |
local.embargo.terms | 6 months | en |
local.embargo.lift | 2013-09-11T12:38:21Z | |
local.publisher | 2 Laboratory of Pomology, Graduate School of Life and Environmental Sciences, Tsukuba | en |
local.publisher | 3 Jomo Kenyatta University of Agriculture and Technology, Department of Food Science and Technology | en |
local.publisher | 1 University of Nairobi, Department of Plant Science and Crop Protection | en |