Mehdi Garazhian; Saeid Eshghi
Abstract
It is necessary to determine the amount of chilling requirement of present cultivars and also to produce new low chill cultivars through breeding programs because of the global warming phenomenon and tendency to grow temperate fruit in warm climate. In this study, the amount of chilling requirement in ...
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It is necessary to determine the amount of chilling requirement of present cultivars and also to produce new low chill cultivars through breeding programs because of the global warming phenomenon and tendency to grow temperate fruit in warm climate. In this study, the amount of chilling requirement in ‘Askari’, ‘Rotaby’, ‘Yaghuty’, ‘Rish Baba’ and ‘Monaga΄ were evaluated. Uniform cuttings of mentioned cultivars were harvested when leaves were abscised in autumn, and then transferred to refrigerator (2˚C). Cuttings were subject to 0 (unchilled control), 100, 200, 300, 400, 500 chilling hours, then cutting were brought from chilling condition and put them in distilled water at room temperature (20º C) and continues light conditions. Number of sprouting bud and data of first and last bud break were recorded. The lowest bud break percent in ‘Askari’ and ‘Rotaby’ were in unchilled control (25%). The highest bud break percent in ‘Askari’, ‘Rotaby’ and ‘Yaghuty’ were at 500 h chilling (100%), 400 and 500 h, (100%), and 400 and 500 h, respectively. There were no significant differences between 200, 300 and 500 h chilling in ‘Monaga’ and bud break was 100% in these treatments. The highest bud break in ‘Rish Baba’ was at 400 and 500 h. The shortest required period time to 50% bud break was in ‘Askari’ at 400 h (23d), ‘Rotaby’ at 500 h (23 d), ‘Yaghuty’ at 400 h (13 d), ‘Rish Baba’ at 400 h (18 d) and in ‘Monaga’ at 200 h (16 d). In conclusion the chilling requirements of studied cultivars were as following: ‘Monaga’ (200 h), ‘Rotaby’ (300 h), ‘Askari’ (300h) ‘Rish Baba’ and ‘Yaghuty’ (400 h).
Moslem Kyamarsi; Saeid Eshghi
Abstract
Abstract
An investigation was performed in a commercial orchard in Shiraz to study the effect of time of application of CuSO4 and streptomycin on quality and seedlessness of grapevine (Vitis vinifera L. cv. ‘Siyah-e-Shiraz’). The experiment was Conducted as Completely randomized block design with ...
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Abstract
An investigation was performed in a commercial orchard in Shiraz to study the effect of time of application of CuSO4 and streptomycin on quality and seedlessness of grapevine (Vitis vinifera L. cv. ‘Siyah-e-Shiraz’). The experiment was Conducted as Completely randomized block design with 3 replications. Plants were treated with 25 mgl-1 CuSo4. 5H2o and 200mgl-1 streptomycin 2,4 and 6 days before full blooming. 50 mgl-1 GA3 was applied 10 days after full blooming. Results indicated that both CuSO4 and streptomycin increased parthenocarpy compared with untreated control. Streptomycin and CuSO4 6 days before full blooming plus GA3 produced the highest rate of seedlessness (84%). Both CuSO4 and streptomycin reduced the number of seeds, cluster weight, berry weight, length and diameter of the berries compared with untreated controls. GA3 increased weight of seedless berries, vitamin C and total acid contents unsignificantly.
Keywords: CuSO4, GA3, Grape, Parthenocarpy, Streptomycin
Rohollah Jahanbin; Sara Yavari; Saeid Eshghi; Enayatollah Tafazoli
Abstract
Abstract
Navel oranges are cultivated in many countries including Iran and in Comparable to With other cultivars of citrus have an especial importance in THE world The quality and quantity of this Product in fluenced by many factors. This research was CARRIED OUT to investigate the effect of 2,4-D ...
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Abstract
Navel oranges are cultivated in many countries including Iran and in Comparable to With other cultivars of citrus have an especial importance in THE world The quality and quantity of this Product in fluenced by many factors. This research was CARRIED OUT to investigate the effect of 2,4-D and K2SO4 and their interaction on quantitative and qualitative characteristics of sweet orange cv. Navel fruits afactorial enperiment as a randomized complete block de sign (RCBD) with 9 treatments and 4 replications was Performed. 2,4-D was sprayed at 0, 10 and 20 mg l-1 and K2SO4 at 0, 1 and 2 percent when diameter of fruits was 15 mm in the growing season of 2006. ResultS has shown that 2,4-D at 20 mg l-1 plus 2% potassium significantly increased weight and total acid of fruit and at 10 mg l-1 with different concentration of potassium increased fruit juice significantly. Potassium had a Significantly effect on qualitative characteristics of fruits including total soluble solids, acidity and ascorbic acid.
Key words: Navel sweet orange, 2,4-D, K2SO4, fruit size, fruit quality
