در تونل پلاستيكي كاغذ BOUGOINVILLEA SRPTABILIS اثر هورمون اكسين بر ريشه زايي قلمه هاي برگدار و بدون برگ گل

The Effects of Different Auxins on Rooting of Leafy and Leafless Cutting of Bougainvillea Spectabilis in Plastic Tunnel

To evaluate the effects of plant growth regulators on rooting of stem cutting leafy and leafless cutting of bougainvillea, Indolebutyric acid (IBA) and Naphthaleneacetic acid (NAA) and their combinations were applied in the spring. After selection of suitable mother plants, shoots in 0.8-1.2 cm diameter were cut for preparing cuttings. In this research, two auxins, IBA and NAA at concentrations of 0, 1000, and 2000 mg 1"ʹ as wellas the combinations of concentration of 2000 mg 1-ʹ of these two auxins were used (1000mg-1 IBA and 1000mg-1 NAA). The cuttings were treated with auxin solution for 30 seconds and immediately transferred to rooting sand medium in a plastic tunnel. Treatment was evaluated in. a completely randomized design with a factorial arrangement with three replications. Each replication .consisted of 10 cuttings and the means were compared using Duncanʹs multiple range test. The results showed that the best rooting of cutting with the high percentage of 90 was obtained for leafy cutting. The highest number of roots were obtained in leafless cuttings (9.23 root per plant) at 2000 mg 1`ʹ IBA. The best effect of different levels of auxins on root length (5.79 cm) was obtained leafless at 1000 mg 1-1 NAA. The leafless cuttings had the highest root diameter (1.06 mm) at 1000 mg l-ʹ NAA. Also, the highest root dry weight (69 mg) was observed at 2000 mg 1ʹʹ IBA for leafless cuttings. Also, it was indicated that the factors like rooting percentage, number of roots and root dry weight in leafy and leafless cuttings were significantly more than the control (P<0.05).