Journal
BRAZILIAN ARCHIVES OF BIOLOGY AND TECHNOLOGY
Volume 49, Issue 2, Pages 189-196Publisher
INST TECNOLOGIA PARANA
DOI: 10.1590/S1516-89132006000300002
Keywords
auxins; paclobutrazol; Pinus caribaea
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This work evaluated the rooting of Pinus caribaea var. hondurensis Morelet cuttings under the action of different levels of plant growth regulators. The cuttings consisted of 4-6 cm long shoots of P. caribaea var. hondurensis Morelet with their basal needles removed. The basal part of the cuttings were treated for 2 seconds with the following treatments: 1- NAA 2000mg L(-1); 2-NAA 4000mg L(-1); 3- NAA 6000mg L(-1); 4- NAA 2000mg L-1 + PBZ 100mg L(-1),- 5-NAA 4000mg L(-1) + PBZ, 6-NAA 6000mg L(-1) + PBZ; 7-IBA 2000mg L(-1); 8-IBA 4000mg L(-1); 9-IBA 6000mg L(-1); 10-IBA 2000mg L(-1) + PBZ, 11-IBA 4000mg L(-1) + PBZ; 12-IBA 6000mg L(-1) + PBZ; and a control. After receiving the treatment, the cuttings were planted in tubes containing 50% carbonized rice hulls and 50% vermiculite. The evaluations, performed 60 days after planting, showed that P. caribaea var. hondurensis cuttings treated with IBA produced a higher percentage of rooted cuttings than those treated with NAA; the most effective treatment was IBA 4000mg L(-1) plus 100mg L(-1) paclobutrazol.
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