عنوان مقاله [English]
Introduction: Barijeh is a perennial and monocarp plant of the umbrella family, which is one of the valuable native plants of Iran and its leachate is considered as an important export item of the country. Propagation of plants is one of the most important phenomena to preserve life on earth. In cases where plant propagation is not possible with the help of seeds or is associated with problems, asexual propagation methods of plants can be used, including transplantation methods. Due to the preservation of genetic characteristics and the lack of somaclone diversity in plants, transplanting is a suitable method for large-scale plant production. Seedlings refer to the early stages of growth during which seedlings can not be forced to flower. The seedling period can often be shortened by increasing the growth rate of young seedlings and bring the plant to fruiting stage earlier. Factors such as the type of transplant or the age of the transplant seem to be influential in this regard.
Materials and Methods: This experiment was conducted in factorial during 1397-98 with two factors in the form of a completely randomized design with three replications in the greenhouse and research farm of Islamic Azad University, Shirvan Branch. The first factor was the type of grafting of Barijeh plant which was examined in four levels of control (without grafting), tuber grafting, leaf grafting and crown grafting and the second factor was grafting age which was studied in four levels of annual, biennial, triple and four year old grafts. Basic plants (aged five years) as well as tested scions were prepared in mid-May 1397 from the botanical garden of North Khorasan Research Center located in Bojnourd. At the end of May of the same year, transplantation was performed on basic plants in three forms: tuber transplantation, stem transplantation and leaf transplantation. Transplanted seedlings were transferred to the main land in mid-winter and began their vegetative growth in early March. Three months after the transfer of seedlings to the main land, at the end of May 1398, graft yield, stem height, leaf number, leaf inclination and tuber length were measured. Also, after the plant entered the reproductive phase (early July), the number of flowers per plant was measured on June 1 and then in late June, the number of seeds per plant was measured. Data analysis by Mini tab statistical software version 17 and comparison of means It was performed using LSD test at a probability level of one percent.
Results and Discussion: The results showed that the interaction effect of transplant type and scion age on all studied traits was significant. The highest graft attractiveness, leaf length and stem height were 80%, 3.56 cm and 4.47 cm in tubular and four-year-old grafts, respectively. The highest number of leaves was observed in four-year-old scion in control and tuber transplantation treatments and only in these two treatments the number of leaves reached more than 11 leaves per plant. The longest tuber length was observed in three-year and four-year-old grafts in control and tuber graft treatments, and only in these four treatments was the tuber length more than 24 cm obtained.
Conclusions: The success of the transplant depends on various factors such as the type of base, the physiological condition of the base, the type of transplant, the origin of the transplant, the age and length of the transplant and the compatibility of the base and the transplant. In the present study and in the study of barijeh plant transplantation, because the crown diameters of one to four year old plants that were used as grafts on five-year-old mature plants as grafting bases were smaller, so less success was achieved in crown grafting. In leaf transplantation, the transplantation was not very successful due to less contact between the rootstock and the scion. The results of this experiment showed that the best method of transplantation in barijeh plant is tuber transplantation and the best age of scion is the selection of four-year-old plant.