Ebrahim Abedi; Vali Rabie; Malek Ghasemi; Farhang Razavi; Javad Fattahi
Abstract
Information about the temperature requirements in fruit trees has an important effect on productivity and determining suitable regions for their growing. This research was carried out using single node cuttings test in a randomized complete block design with three replications in Citrus and Subtropical ...
Read More
Information about the temperature requirements in fruit trees has an important effect on productivity and determining suitable regions for their growing. This research was carried out using single node cuttings test in a randomized complete block design with three replications in Citrus and Subtropical Research Center in 2015-16. This study was conducted to determine the chilling requirements of Hayward and Tomuri cultivars and male and female golden genotypes using three chilling models (Chilling hours, Utah, Dynamic) and their heat requirements using growth degree hours (GHD) method. Results showed that the chilling requirements of female and male golden genotype buds were 480 and 585 chilling hours, respectively, and for Hayward and Tomuri cultivars were 692 chilling hours. The amount of buds heat requirements in the cultivar and genotype ranged from 2233 GHD in female golden genotype to 4066 GHD in Hayward cultivar. Hayward cultivar required 966 hours of chilling requirement for maximum flowering, meanwhile Tomuri, male and female golden genotype had a similar chilling for both vegetative bud break and flowering including 692, 585 and 480 hours, respectively. With continued sampling, heat requirements reduced and significant negative correlation was found between chilling and heat requirements for bud break. From low chilling requirements of male and female golden genotypes, we can deduce that climatic conditions may be not limiting factor in the leading of them in growing area. It is thought that Utah and dynamic models may be more suitable than hour model to evaluate of chilling requirements.
Sonia Jamali; Vali Rabiei; Javad Fattahi Moghadam
Abstract
Treated with different coating and application of methyl salicylate and salicylic acid are used for reduce chilling injury and maintain the quality of citrus fruit during storage. This experiment was carried out Citrus Research Institute of Ramsar in 91 years in order to study enzyme activity that involved ...
Read More
Treated with different coating and application of methyl salicylate and salicylic acid are used for reduce chilling injury and maintain the quality of citrus fruit during storage. This experiment was carried out Citrus Research Institute of Ramsar in 91 years in order to study enzyme activity that involved in reducing chilling injury and Maintain the fruit quality based on Split Plot design with three replications. Fruits was treated and then placed in the cool storage at 5°C and 95 percent relative humidity)RH( for 80 days. Each 20 days with sampling investigated fruit enzyme activity was measured. Results showed the highest PAL enzyme activity was in fruits treated with methyl salicylate and the lowest was in fruits coated with the Bretix wax. The highest SOD enzyme activity related to Moro fruits which treated with methyl salicylate is in the first 20 days of storage )23/19 umg/FW(. The APX enzyme activity increased in both cultivars Thomson and Moro during storage. Relatively, treatments caused the change in APx, SOD and PAl enzyme activity.
nastaran hemmati; azim ghasem nezhad; javad fattahi moghaddam; pouneh ebrahimi
Abstract
The present study was done to investigate the correlation between biochemical changes of grafted tree fruits and rootstock fruits in Gorgan university of agricultural science and natural resources in 2012-2013. For this purpose, the antioxidant activity and the total content of phenol and flavonoid ...
Read More
The present study was done to investigate the correlation between biochemical changes of grafted tree fruits and rootstock fruits in Gorgan university of agricultural science and natural resources in 2012-2013. For this purpose, the antioxidant activity and the total content of phenol and flavonoid on four rootstocks such as Yuzu (Citrus junos), Shelmahalleh (Citrus sinensis var. shel mahalleh), Citrumelo (Citrus paradisi X Poncirus trifoliate), Sour orange (Citrus aurantium) and Italian and Salustiana grafted tree were studied in skin and flesh of fruits. This research was done as a factorial experiment based on completely randomized design with three replications. The result showed that the measured parameters were significantly influenced by cultivar, rootstock and tissue. The highest amount of total phenol (21.38 mg/gDM) was recorded in Italian skin on Shelmahalleh rootstock. The most antioxidant activity (85.71 percent) was produced in the skin of Citrumelo rootstock. The maximum content of total flavonoid (0.337 mg/gDM) was observed in the skin of Salustiana on Yuzu rootstock. The investigation indicated that the total phenol accumulation ability of rootstock fruit influences the antioxidant activity of the grafted tree fruits with a positive correlation Although there was significant differences between antioxidant compounds of grafted tree fruits with fruits of their rootstocks, but there was no relationship between them. It seems this was due to a combination of physiological characteristics of each group (grafted or not) of fruits.
sonia jamali Anjilani; Javad Fatahu moghadam; Vali Rabiei
Abstract
Most of the citrus fruits, especially in North of Iran are stored in common storages. This experimen in oder to persevere appearance and internal fruit quality were conducted in the Citrus Research Station at 1392, Britex-Ti wax, storage wax, polyethlene bag (individual fruit), polyethlene bag (pair ...
Read More
Most of the citrus fruits, especially in North of Iran are stored in common storages. This experimen in oder to persevere appearance and internal fruit quality were conducted in the Citrus Research Station at 1392, Britex-Ti wax, storage wax, polyethlene bag (individual fruit), polyethlene bag (pair fruits) were used alone and with combination with methyl salicylate (MeSA) vs. control (without coating and MeSA). ‘Moro’ blood orange fruits were treated and placed in the common storage for 80 days. Effect of every 20 days intervals was investigated to preserve fruit anti-radical compounds. Results showed that fruits in control and methyl salicylate treatments had the high ratio of TSS/TA after 80 days storage. Individual fruits in bags which treated by methyl salicylate had the highest total anthocyanin (3.99 mg/g FW) and total phenol (peel) contents (0.23 mg/g FW) during 40 days of storage. Individual fruit in bag treatment in combination with methyl salicylate application resulted to the highest ascorbic acid. The highest rate of total phenols was observed in fruits pulp treated with Britex –Ti wax after 60 days storage. Totally, combined treatments had significant influences on reducing decay and enhancing interval quality of ‘Moro’ fruits in common storage.