ISHS Acta Horticulturae 626: XXVI International Horticultural Congress: Berry Crop Breeding, Production and Utilization for a New Century
INITIAL SHOOT GROWTH AND DEVELOPMENT OF MICROPROPAGATED BLUEBERRY PLANTS FOLLOWING INOCULATION WITH AN ERICOID MYCORRHIZAL ISOLATE |
| Author: | M.C. Starrett |
| Keywords: | Vaccinium corymbosum ’Bluecrop’, Hymenoscyphus ericae, highbush |
| Abstract:
Microshoots of blueberry (Vaccinum corymbosum 'Bluecrop') were rooted directly in autoclaved Jiffy-7® Peat Pellets containing established cultures of one of five different isolates of the ericoid mycorrhizal fungus, Hymenoscyphus ericae or remained non-inoculated. Microshoots were grown for 8 weeks under aseptic conditions in a growth chamber and then transferred to a greenhouse for 16 weeks. At harvest the following were recorded: shoot length, shoot number, leaf number, leaf area, shoot dry weight and extent of root colonization. There was no difference in shoot growth of inoculated plants when compared to non-inoculated controls. There was significant differences between isolates and their extent of root colonization. Isolate, HE colonized roots the most extensively (93%) whereas roots were infrequently colonized by the isolate BMA (8%). There was a positive correlation between extent of roots colonized by the isolate, LPA and leaf area, shoot length and shoot dry weight of the host plant. No other isolates produced either positive or negative responses in shoot growth measurements. | |
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