Shadi Mohamadi-Nejad; M. Gholami; Mahmood Esna-Ashari
Abstract
This research was conducted to study the factors affecting establishment, growth and shoot proliferation of Persian walnut, genotype Z60. Explant establishment was studied through a factorial experiment based on a completely randomized design with two factors including culture media (DKW and WPM) and ...
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This research was conducted to study the factors affecting establishment, growth and shoot proliferation of Persian walnut, genotype Z60. Explant establishment was studied through a factorial experiment based on a completely randomized design with two factors including culture media (DKW and WPM) and BA concentration (0 (control), 0.5 and 1.0 µM). Single-node explants were prepared from the young branches of Z60 trees in the middle of May. Although the effect of two culture media on the growth characteristics had no significant difference, but mean comparison of the data with this regard showed that DKW medium performed better than WPM. No significant difference was observed between the two BA concentrations, but significant difference was between two concentrations (0.5 and 1.0 µM) with 0 (control). In shoot proliferation experiment, two cytokine hormones (BA and Kinetin) in three concentrations (4.4, 6.6 and 8.8 µM) were studied in DKW medium. The data obtained from this part of experiments were analyzed through unbalanced completely randomized design. The effect of different hormonal treatments and their concentrations on Z60 genotype growth characteristics showed that 8.8 µM BA was more effective in compared to the other two treatments. However, no significant difference was observed between the three concentrations with this respect.
Azam Seddighi; M. Gholami; Hassan Sarikhani; Ahmad Ershadi
Abstract
The use of compounds inhibiting ethylene production is very important in post-harvest technology of fruits. Sweet cherry is a non-climacteric fruit with capability of ethylene production during storage period. Factors that decrease ethylene production would increase fruits storage life. In this research ...
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The use of compounds inhibiting ethylene production is very important in post-harvest technology of fruits. Sweet cherry is a non-climacteric fruit with capability of ethylene production during storage period. Factors that decrease ethylene production would increase fruits storage life. In this research sweet cherry fruits of Mashhad cv. were sprayed with different concentrations of Salicylic Acid (0.5, 1, 2, and 3 mmol/l) and Gibberelic Acid (0, 10, 20 and 30 mg/l). Fruits were sprayed about three weeks before harvest, when their color started to change from green to yellow. The experiment was performed in a completely randomized design with three replicates. The results showed that GA had less effect on decreasing ethylene production compared to SA, but did better on anthocyanin accumulation, fruit size, soluble solids content and fruit weight. GA treatment delayed fruit ripening and ethylene production but had little or no effect on the fruit color as an important ripening index. During storage period also the total amount of anthocyanin in fruits increased due to hormone treatments whereas the ethylene production decreased compared to control fruits.
