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The Effectiveness of Arbuscular Mycorrhizal Fungi (AMF) Inoculation on the Growth of Lettuce  

Wee, Chi-Do (Department of Agrucultural Chemistry, Sunchon National University)
Li, Jun-Xi (Department of Agrucultural Chemistry, Sunchon National University)
Kim, Hong-Lim (Namhae Sub-Station, National Institute of Horticultural & Herbal Science, Rural Development Administration)
Sohn, Bo-Kyoon (Department of Agrucultural Chemistry, Sunchon National University)
Publication Information
Korean Journal of Soil Science and Fertilizer / v.43, no.4, 2010 , pp. 498-505 More about this Journal
Abstract
To evaluate the effectiveness of AMF on the growth of horticultural crops, we compared mycorrhizal and non-mycorrhizal plants, lettuce (Lactuca sativa L.), that were inoculated with AMF propagules. As compared to the AMF- seedlings, in AMF+ seedlings at 3 weeks after sowing, the number of leaves increased 9%, leaf fresh weight increased 59%, leaf area increased 58%, and leaf length and width increased 21-22%, and chlorophyll content increased 2%. Furthermore, at 9 weeks after sowing, compared to the AMF- plants, in lettuce plants inoculated with AMF at the sowing and transplanting stages, the number of leaves increased 21% and 18%, leaf fresh weight increased 51% and 41%, root fresh weight increased 56% and 47%, and chlorophyll content increased 18% and 19%, respectively. Further this experiment indicated that the growth responses of lettuce plants inoculated with AMF during transplanting were similar to those inoculated with AMF during sowing. The results imply that the AMF infection timepoint is not important. The P content in the leaves of lettuce plants inoculated with AMF during transplanting was significantly higher (217%) than that of leaves from lettuce plants not inoculated with AMF. In contrast, the P content of the leaves of lettuce plants inoculated with AMF during the sowing stage was similar to that of leaves of control lettuce plants. In this experiment, P and chlorophyll content in AMF+ lettuce plants were higher than in AMF- plants, indicating that the photosynthetic rate was improved with AMF inoculation.
Keywords
Arbuscular mycorrhizal fungi (AMF); Lettuce (Lactuca sativa L.);
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