Document Type : Research Paper
Authors
1 tabriz
2 دانشگاه تبریز
3 PhD Student in Production and Post-Harvest Physiology of Medicinal Plants, Department of Horticultural Science and Engineering, Faculty of Agriculture, University of Tabriz, Tabriz, Iran.
Abstract
Introduction
To evaluate the effect of different levels of IBA (0, 1000, 1500 and 2000 mg/L) and position of take cuttings (lower, middle and upper) on rooting of greenhouse rose cultivar cherry brandy. In general, this research is to determine the best level of IBA hormone for the rooting of greenhouse rose cuttings, to determine the possible effect of the possible of the cutting on the rooting rate of the cuttings, to determine the most suitable level of the hormone and the location of the cutting to produce the desired aerial part of the resulting cutting, to evaluate the best level of the hormone and determining the most suitable position for cutting is based on some physiological parameters such as the relative content of leaf water and the efficiency of maximum chlorophyll fluorescence.
Materials and Methods
To conduct the experiment, the mother plants were purchased from a commercial greenhouse in Bostan-Abad and transferred to the physiology laboratory. To conduct the experiment, rose cuttings with a length of 10 to 12 cm and a diameter of 2 to 3 mm were prepared, and after removing the lower leaves, at least two end leaves were left on the cutting. In this experiment, a factorial method based on a randomized complete block design with three replications was used. The traits measured in this experiment were rooting percentage, root fresh weight, number of roots, root length, relative leaf water content and variable to maximum fluorescence ratio.
Results and Discussion
The results of the average data comparison showed that the highest rooting percentage of cuttings and root fresh weight were seen in the treatment of 1500 mg/L of IBA and in the cuttings of the lower and upper parts, respectively. The lowest rooting percentage of cuttings and root fresh weight were also observed in the cuttings taken from the upper of the branch without hormone application. The cuttings taken from the lower part of the branches at a concentration of 1500 mg/L of IBA had the highest number of roots, which did not show a significant difference with the middle cuttings of the branch at a concentration of 1500 mg/L and lower cuttings at a concentration of 2000 mg/L. The cuttings in the middle part produced the lowest number of roots in the control treatment. The cuttings taken from the middle and upper of the branch had the longest and shortest root length, respectively. The cuttings taken from the lower part of the branch at a concentration of 1500 mg/L and the middle part at a concentration of 2000 mg/L of hormone had the highest and lowest relative content of leaf water, respectively. The maximum variable chlorophyll fluorescence was observed in the cuttings taken from the lower part of the branch and treated with 1500 mg/L of hormone. The terminal cuttings also had the lowest variable chlorophyll fluorescence to the maximum under the absence of hormone application.
Conclusion
Finally, due to the fact that the concentration of 1500 mg/L and the lower cuttings had the highest percentage of rooting, root length, root fresh weight, relative leaf water content and maximum variable chlorophyll fluorescence. It should be the best type of cuttings and hormone concentration for the rooting of rose cuttings. At the highest concentration of indole butyric acid (2000 mg/L) in most cases, there was no increase in the rooting characteristics of rose cuttings compared to the concentration of 1500 mg/L.
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