Ecotypic Specificity of Spruce Emergence-Stimulating Pseudomonas putida
Abstract:Hybrid spruce (Picea glauca X engelmannii) seed and seedlings were collected from two sites in British Columbia, near Mackenzie and near Salmon Arm. One strain of Pseudomonas putida was isolated from the rhizosphere of seedlings collected from each site. These strains were deduced to be distinct from each other based on analysis of bacterial fatty acids. Experiments were conducted to determine if P. putida affected spruce seedling emergence, and if the nature or magnitude of these effects were related to the geographic origin of bacteria and seed. Inoculation of spruce with P. putida that did not originate from the same site as the seed caused an increase in the number of seedlings that emerged, but this effect was not statistically significant. However, when the origin of the spruce seed was matched to that of the P. putida strain, a significant (P < 0.05) increase in the amount and rate of seedling emergence was detected. These results are discussed in relation to the regeneration strategy of spruce in natural forests. For. Sci. 39(3):520-527.
Document Type: Journal Article
Affiliations: Department of Plant Science, University of British Columbia, Vancouver, British Columbia V6T 1Z4 Canada
Publication date: August 1, 1993
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