Short-term response of arbuscular mycorrhizal association to spider mite herbivory |
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Authors: | Takaaki Nishida Naoyuki Izumi Noboru Katayama Takayuki Ohgushi |
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Affiliation: | (1) Center for Ecological Research, Kyoto University, 3-509 Hirano 2-chome, Ohtsu Shiga, 520-2113, Japan;(2) Department of Forest Science, Faculty of Agriculture, Kyoto Prefectural University, 1-5 Hangi-cho, Shimogamo, Sakyo-ku, Kyoto 606-8522, Japan |
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Abstract: | We examined effects of aboveground herbivory by spider mites (Tetranychus urticae) on colonization and activity of arbuscular mycorrhizal fungi (AMF; Gigaspora margarita) using potted plants (Lotus japonicus). We evaluated changes in arbuscular mycorrhizal (AM) association two ways: (1) conventional trypan blue staining of mycorrhizal hyphae to examine AMF biomass in roots (mycorrhizal colonization) and (2) vital staining for a mycorrhizal enzyme (succinate dehydrogenase, SDH) to examine mycorrhizal activity (SDH activity). Mycorrhizal colonization and SDH activity started to increase 4 days after aboveground herbivory, and returned to the initial levels in the absence of mite herbivory in 7 and 12 days, respectively. These results suggest that the change in AM association in response to mite herbivory is a short-term response. |
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Keywords: | Aboveground– belowground interaction Arbuscular mycorrhizal fungi Indirect effect Lotus japonicus |
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