The potential benefits from cultivar specific red clover -potato crop rotations |
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Authors: | A V STURZ B R CHRISTIE |
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Affiliation: | Prince Edward Island Department of Agriculture and Forestry, PO Box 1600, Charlottetown, Prince Edward Island, Canada CIA 7N3;Agriculture and Agri-Food Canada, Charlottetown Research Station, PO Box 1210, Charlottetown, Prince Edward Island, Canada CIA 7M8 |
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Abstract: | The aim of this study was to determine if endophytic bacteria could contribute to cultivar specific interactions between red clover (Trifolium pratense L.) and potatoes (Solanum tuberosum L.) in crop rotations. Endophytic bacteria were isolated from the roots of four red clover cultivars (AC Charlie, Altaswede, Marino and Tempus) grown in the field. Populations of bacteria from each cultivar were similar. The most abundant genus was Rhizobium, but species of Curtobacterium, Pseudomonas, and Xanthomonas were common to all cultivars. Plantlets of two potato cultivars, Russet Burbank and Shepody, were inoculated individually with the seven bacterial isolates most frequently recovered from each red clover cultivar, and grown in Magenta vessels for 6 wk. Significant differences were found for plant height, and wet weights of roots, shoots and their total. Potato cultivars differed for root wet weight only, while red clover cultivar, as a source of bacteria, had a significant effect on all traits except plant height. Differences among bacteria were significant for all traits except shoot wet weight. There was a significant interaction of potato cultivar by red clover cultivar. The potato cultivar Russet Burbank did best with bacteria from the red clover cultivar, Marino; and Shepody, with bacteria from Altaswede. |
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Keywords: | Trifolium Solanum endophytic bacteria beneficial allelopathy plant growth-promotion allelopathy crop rotation |
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