اثر 1- متيل سيكلو پروپن ﴿1- ام سي پي﴾ بر افزايش عمر انبار ماني و قفسه اي ميوه توت فرنگي

چكيده انگليسي :

AbstractStrawberry FragariaX ananassa is one of the most tasteful and fragrant fruits in the world that hasgreat nutritional value However the storage life of this beneficial fruit is about five days in 0 C Thiscategorizes strawberries among some of the most easily decaying type of fruits In supermarkettemperature 20 C strawberries decay rapidly and lose their shelf life Ethylene is one of the causes ofthe acceleration in the ripening and loss of the fruit after harvest Thus anti ethylene substances couldincrease storage life of fruits 1 Methylecyelopropene 1 MCP is a new material which prevents theethylene from reacting in quite low concentration and is easily consumed and does not exert negativeeffects on the health of human being and the environments The discovery and use of 1 MCP hasprovided a suitable opportunity for scientists and the use of 1 MCP in most nonclimactric fruits haspostponed any changes in them Calcium chloride increased the storage life and the stability offirmness of the fruits through the formation of a rigid cell wall in the tissues of fruits This is because instrawberries with respect to their amount of calcium The hypobaric storage method provides one ofthe most recent methods in preserving horticultural products since they decrease the density of theCO2 O2 and ethylene surrounding the fruits through a decrease in air ripening of the fruit Therefore such research studies were carried out with the goal of establishing the utilizing potentiality of 1 MCP calcium chloride and provision of low pressure atmosphere in order to increase the preservationcapacity of the Camarossa strawberries In the first experiment the effect of using zero concentration Control 0 25 0 5 0 75 and 1 L L 1 of 1 MCP on the storage life 1 C and shelf life 20 C of thefruits over a period of 27 days was studied The study was done through the split plot in time within acomplete randomized design in 3 replications Sampling and analysis of the fruits were carried outevery three days interval The second experiment was done through immersion of fruits in zero density Control 0 25 0 5 and 0 75 mM of CaCl2 including the pretreatment of low pressure air up to 0 6atmosphere for five minutes and the effect of this provision on the storage life of the fruits 1 C in afactorial method through complete randomized design was examined The third experiment was alsocarried out in order to examine the effect of the provision of 1 MCP and low pressure air of about 0 2atmosphere in 2 hours on the optical and physicochemical characteristics of the fruit during storage lifein cold storage 1 C using the same method as described for first experiment The results of the firststudy showed that the highest marketability firmness citric acid TA vitamin C and the lowestamount of appearance decay pH the ratio of TSS TA and also the fewest anthocyanin and total solublesolid TSS in the treatment of 1 L L 1 of 1 MCP were seen This observation depicts the positive andsignificant effect of 1 MCP over the reduction in the speed of biochemical changes in the fruit tissue the highest fruit color indices include brightness L color regions a and b and Chroma C wereseen in 1 L L 1 treatment Because 1 MCP greatly influenced all over characteristics under study thusit must also be influential with respect to various aspects of the fruit ripening process which has causedit delay in ripening Moreover the result obtained from the study over the effect of 1 MCP on the shelflife of strawberries in 20 C showed that this substances relatively positive effect on the preservation offruit and it seems that 1 MCP is able to keep the quality of fruits over longer periods of time in higherdegrees of temperature The effects of different applications of CaCl2 and the pre treatment of lowpressure atmosphere on storage life of the fruits in the second study showed that just total soluble solid

مدرس، بهفر

اثر 1- متيل سيكلو پروپن ﴿1- ام سي پي﴾ بر افزايش عمر انبار ماني و قفسه اي ميوه توت فرنگي

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