Saber Sadeghpour; Lotfali Naseri; Morteza Nobahar; Reza Rezaee; Roghayeh Najafzadeh
Abstract
Walnut is one of the most important nut crops in Iran. In order to achieve an appropriate and economical production of old seedling orchards of this product, the only fastest and most cost-effective possible option for improving seedling trees is graft operation through top-working using the new improved ...
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Walnut is one of the most important nut crops in Iran. In order to achieve an appropriate and economical production of old seedling orchards of this product, the only fastest and most cost-effective possible option for improving seedling trees is graft operation through top-working using the new improved cultivars in the world. This study was conducted as a factorial experiment in a Randomized Complete Blocks Design under West Azerbaijan conditions, with the aims of determine the best time for grafting during April and May 2011-2012 season and doing a modified side grafting method and compare it with the bark grafting. For this purpose, two superior ‘Pedro’ and ‘Chandler’ walnut cultivars were used as scions to achieve a high percentage of graft take. The results showed that the highest percent of graft-take was related to the modified side grafting method with the highest rates of graft survival (97.32 percent) and final graft-take (83.93 percent), that was better than bark grafting in in top-working of walnut trees. Also, regarding the grafting time, the highest percent of graft-take was obtained from May with the highest rates of graft survival (98.95 percent) and final graft-take (89.49 percent), that was higher than April.
Saber Sadeghpour; Lotfali Naseri
Abstract
In this research, the effect of different concentrations of chitosan (with low molecular weight) on in vitro proliferation of grape cultivar, ’Bidaneh Ghermez‘, was evaluated. 30 days after establishment, elongated shoots were cultured on the half strength Murashige and Skoog medium supplemented ...
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In this research, the effect of different concentrations of chitosan (with low molecular weight) on in vitro proliferation of grape cultivar, ’Bidaneh Ghermez‘, was evaluated. 30 days after establishment, elongated shoots were cultured on the half strength Murashige and Skoog medium supplemented with 0.5 mg/l BAP, 0.1 mg/l IBA and different chitosan concentrations (0, 10, 20, 40 and 80 mg/l). The experiment was based on completely randomized design with five replications. Based on the results, the number of shoots, wet and dry weight of biomasses, leaf surface and chlorophyll index were highest at 40 mg/l chitosan. The highest shoot length and diameter were observed at 20 and 40 mg/l chitosan. The highest internode length was seen both in the control and 40 mg/l chitosan. In general, 40 mg/l chitosan significantly improved the proliferation. As a result it can be used as a growth stimulant material to increase for in vitro proliferation of this grape cultivar.