ISHS Acta Horticulturae 596: VIII International Symposium on Pear
IN VITRO ROOTING OF PYRODWARF AND CYDOMALUS, TWO ROOTSTOCKS FOR PEAR, UNDER PHOTOAUTOTROPHIC CONDITIONS |
| Authors: | G. De Paoli, E. Subirà, A. Battistini |
| Keywords: | micropropagation, sucrose, peat, vermiculite, Pyrus communis, Malus communis, Cydonia oblonga, rootstocks, auxins |
| Abstract:
During the last five years the Vivai Battistini dott. Giuseppe has increased the production of Pyrodwarf (‘Old Home’ x ‘Bonne Luise D'Avranches’) and Cydomalus (Malus communis x Cydonia oblonga) rootstocks. Experiments were carried out to improve “in vitro” root development, by modification of the substrates (agar, vermiculite, peat, pumice + vulcanite in different combination) plus evaluation of various concentrations of sucrose. Pyrodwarf rooting was good and varied little in relation to the different media but there was a lower percentage of rooting with vermiculite + peat. In contrast, Cydomalus gave better rooting with vermiculite + peat. In Cydomalus different concentrations of sucrose affected the number of rooted shoots and 30g/L sucrose stimulated the number of roots. The percentage of rooting and growth of plants was inferior in media without sugar in both rootstocks. Support substances (particularly vermiculite and peat) increased rooting as compared to agar alone. | |
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