ROOTING OF PEAR TREE SEMI-HARDWOOD CUTTINGS UNDER CONTROLLED ROOMS AND GREENHOUSE ENVIRONMENTS

W. Barbosa, R. Pio, N.P. Feldberg, E.A. Chagas, C.V. Pommer
Rooting of semi-hardwood pear cuttings of ‘Taiwan Nashi-C’ and ‘Limeira’ rootstocks, under controlled environments either in a chamber of the B.O.D. (Biochemical Oxygen Demand) type or in a greenhouse was investigated. Semi-hardwood cuttings without leaves, 20 cm long, were treated with 0, 2000, 4000, 6000 and 8000 mg L-1 of indolebutyric acid (IBA), for 5 seconds and placed in a vermiculite and sand mixture substrate (1:1 v/v), humidified weekly with a medium containing MS saline solution and sucrose 1%. Cuttings remained 42 days in both the B.O.D. chambers (26°C, 100% of humidity and 14 hours of photoperiod) and in the greenhouse with an intermittent irrigation system. In B.O.D. chamber, cuttings without IBA showed callus formation seven days after planting. In the greenhouse, callus formation occurred only 21 days after planting. In IBA treated cuttings, callus appeared around the base of the cuttings three days after B.O.D. chamber incubation. Roots emerged from the base tissues and callus and became more evident after the 14th and 28th days, for B.O.D. chamber and greenhouse treatments, respectively. It was verified for Taiwan Nashi-C that the better rooting percentage (92.9%) and root number (7.85) were found using 6000 mg L-1 of IBA concentration in the B.O.D. chamber. Use of B.O.D. with controlled temperature, light and humidity, related to the IBA, was shown to be more advantageous for ‘Taiwan Nashi-C’ and ‘Limeira’ semi-hardwood cutting rooting, so favoring the vegetative propagation of pear trees.
Barbosa, W., Pio, R., Feldberg, N.P., Chagas, E.A. and Pommer, C.V. (2008). ROOTING OF PEAR TREE SEMI-HARDWOOD CUTTINGS UNDER CONTROLLED ROOMS AND GREENHOUSE ENVIRONMENTS. Acta Hortic. 800, 725-730
DOI: 10.17660/ActaHortic.2008.800.99
https://doi.org/10.17660/ActaHortic.2008.800.99
Pyrus, rootstock, propagation, indolebutyric acid
English

Acta Horticulturae