عنوان مقاله [English]
Influence of different auxin treatments and environmental conditions on rooting of semi-hardwood stem cuttings of bottle brush (Callistemon viminalis Sol.) was investigated. Leafy semi-hardwood cuttings of bottle brush were taken from mother plants in the last week of September 2010. These cuttings were treated with 0 (control), 2000, 3000 and 4000 mg/L Indole-3-butyric acid or Naphthaleneacetic acid and then were placed on a sandy rooting bed under mist or polyethylene tent conditions. Experiment was carried out as factorial based on a randomized complete block design with five replications. Cuttings treated with 4000 mg/L Indole-3-butyric acid showed the highest rooting percentage (62%). Cuttings treated with 4000 mg/L Indole-3-butyric acid or Naphthaleneacetic acid also produced the most number of roots. Mean root length and mean dry weight of bottle brush cutting roots were the highest when they were treated with 4000 mg/L Indole-3-butyric acid and were placed under polyethylene tent. Rooting percentage, leaf and root number and new growth of buds of bottle brush cuttings treated with auxin were significantly higher when they were placed under mist condition instead of polyethylene tent. However, even polyethylene tent was better than control in root length and root dry weight of bottle brush cuttings. In conclusion, treating bottle brush cuttings with 4000 mg/L Indole-3-butyric acid or Naphthaleneacetic acid under mist condition was recommended in order to rooting increment.
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