Effect of onion (Allium cepa) root exudates on the hyphal growth of Gigaspora margarita |
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Authors: | K Tawaraya S Watanabe E Yoshida T Wagatsuma |
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Institution: | (1) Department of Bioproduction, Faculty of Agriculture, Yamagata University, Tsuruoka 997, Japan e-mail:tawaraya@tds1.tr.yamagata-u.ac.jp, JP |
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Abstract: | The effect of root exudates from onions differing in P status on spore germination and hyphal growth of arbuscular mycorrhizal
fungi was investigated. Onion (Allium cepa) was grown in solution culture at different phosphorus concentrations (0, 0.1, 1.0, 8.0 and 24.0 mg P l–1) and root exudates were collected. When spores of the arbuscular mycorrhizal fungus, Gigaspora margarita were incubated with these root exudates, spore germination was only slightly affected but hyphal growth was greatly affected,
particularly with exudates from P-deficient plants. This suggests that the P nutrition of host plants influences the composition
of root exudates and thereby the hyphal growth of arbuscular mycorrhizal fungi.
Accepted: 25 June 1995 |
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Keywords: | Arbuscular mycorrhizae Gigaspora margarita Allium cepa Phosphorus Root exudate |
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