تاثير تيمار كلسيم بر عمر پس از برداشت ميوه گوجه فرنگي رقم " دافنيس"

چكيده انگليسي :

52Effects of Calcium Treatments on Postharvest Life of Tomato Lycopersicon esculentum Mill cv Dafnis Sakine Bahramian Bahramian ss@yahoo com 26 september 2014 Department of Horticultural Science Isfahan University of Technology Isfahan 84156 83111 IranDegree M Sc Language FarsiSupervisor Prof Ali A Ramin aa ramin @cc iut ac irAbstractThe tomato Lycopersicon esculentum is one of the most widely consumed fresh vegetable in theindustrialized world Tomatoes are a rich source of fibre vitamin A C and lycopene and studies indicatethat have important role in human nutrition Due to high perishability of tomato it cannot be stored for longduration but by means of postharvest technologies somewhat can control their decay Calcium as anessential plant nutrient actively participates in cell wall structure also as a secondary messenger that playscentral role in regulate physiological function in fruits vegetables and flowers during postharvest life Itseems calcium is good resources to preserve agricultural crops The current experiment was conducted to findthe effect of calcium on postharvest life of tomato fruit cv Dafnis The first experiment was conducted toasses the age of storage life of tomato using treatments of calcium choloride 1 1 5 2 calciumascorbate 0 25 0 5 1 and nano chelate calcium 2 4 6 After treatment the fruits werepresereved at an incubator with 10 C and 90 for 35 days After that the fruits were gotten out each 7 daysand were assesed to determine parameters such as titratable acid pH soluble solids vitamin C firmness weight loss and lycopene content The second experiment was done similar to the first experiment forevaluating the shelf life except the fruit after treatment were kept in an incubator with 18 C and were testedat intervals of every 4 days Both of experiments were performed as a split plot design in time in a completerandomized design with three replications The results of the first experiment showed that calcium has asignificant effect on measured indexes The results showed that The lowest pH soluble solids lycopene thehighest titratable acid and vitamin C in the 1 calcium ascorbate were recorded which it had significantdifference from the other treatments The highest amount of firmness was recorded with 1 calciumascorbate and 2 calcium choloride which they had no significant difference to each other The lowestweight loss was recorded at the 1 calcium ascorbate and except with 2 calcium choloride it hadsignificant difference to other treatments The results of the second experiment showed that treatmentscalcium had a significant effects on all measured indexes The lowest lycopene content was recorded at the 1 calcium ascorbate and except with 2 calcium choloride it to had significant difference to othertreatments The results showed that The lowest pH soluble solids the highest titratable acid and vitamin C inthe 1 calcium ascorbate were recorded which it had significant difference from the other treatments Theeffect of time on all measured traits was significant in each two experiments The interaction effect oftreatment and time was significent about all charactristics According to the result of this study treated fruitswith 1 calcium ascorbate and calcium choloride cause maintain fruit quality properties during storageperiod Key Words tomato postharvest calcium ascorbate calcium choloride nano chelatecalcium

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تاثير تيمار كلسيم بر عمر پس از برداشت ميوه گوجه فرنگي رقم " دافنيس"

كلسيم آسكوربات , كلسيم كلريد , نانو كلات كلسيم