INFLUENCE OF ERICOID ENDOMYCORRHIZAE INOCULATED IN VITRO ON ROOTING AND EARLY GROWTH OF MICROPROPAGATED PLANTS OF VACCINIUM CORYMBOSUM L.
The highbush blueberry in the natural environment is generally mycorrhized by Ascomycetes of the genus Hymenoscyphus; but probably also other mycorrhizal fungi are involved. The aim of the research was to find the best procedures to inoculate the roots of micropropagated plantlets of highbush blueberry with selected symbiotic fungi grown in vitro in order to obtain plants inoculated only with one specific fungus and to evaluate the effect of mycorrhization on rooting and early growth of plantlets. Ten selected fungi have been tested on nine highbush blueberry varieties: Atlantic, Bluehaven, Berkeley, Blueray, Elliott, Bluetta, Herbert, Lateblue and Tophat. Some of the selected fungi showed a low growth in some type of soils, and had a low capacity to invade the highbush blueberry roots, showing less competition in the soil in comparison with other more aggressive fungi. In order to overcome this problem inoculation in vivo and in vitro was tested. The best mycorrhization procedure resulted by inoculating the selected fungi on agar medium and placing the shoots for rooting on a superimposed layer of sterilized peat. Different mycorrhization abilities were observed among different fungi. Consistent differences were found in rooting of propagules in the presence of different fungi. Some of the tested strains induced 100 % rooting of shoots of varieties that did not root at all without fungus.
Eccher, T. and Noé, N. (2002). INFLUENCE OF ERICOID ENDOMYCORRHIZAE INOCULATED IN VITRO ON ROOTING AND EARLY GROWTH OF MICROPROPAGATED PLANTS OF VACCINIUM CORYMBOSUM L.. Acta Hortic. 574, 373-378
mycorrhization, Vaccinium corymbosum L., micropropagation