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dc.contributor.authorHanlon, Meredith T.
dc.contributor.authorCoenen, Catharina
dc.date.accessioned2018-05-18T17:56:52Z
dc.date.available2018-05-18T17:56:52Z
dc.date.issued2010-11
dc.identifier.citationHanlon, M.T. and Coenen, C. (2010). Genetic evidence for auxin involvement in arbuscular mycorrhiza initiation. New Phytologist, 189(3): 701-709. doi: 10.1111/j.1469-8137.2010.03567.xen_US
dc.identifier.issn0028-646X
dc.identifier.issne1469-8137
dc.identifier.urihttp://hdl.handle.net/10456/46151
dc.description.abstractFormation of arbuscular mycorrhiza (AM) is controlled by a host of small, diffusible signaling molecules, including phytohormones. To test the hypothesis that the plant hormone auxin controls mycorrhiza development, we assessed mycorrhiza formation in two mutants of tomato (Solanum lycopersicum): diageotropica (dgt), an auxin‐resistant mutant, and polycotyledon (pct), a mutant with hyperactive polar auxin transport. Mutant and wild‐type (WT) roots were inoculated with spores of the AM fungus Glomus intraradices. Presymbiotic root–fungus interactions were observed in root organ culture (ROC) and internal fungal colonization was quantified both in ROC and in intact seedlings. In ROC, G. intraradices stimulated presymbiotic root branching in pct but not in dgt roots. pct roots stimulated production of hyphal fans indicative of appressorium formation and were colonized more rapidly than WT roots. By contrast, approaching hyphae reversed direction to grow away from cultured dgt roots and failed to colonize them. In intact seedlings, pct and dgt roots were colonized poorly, but development of hyphae, arbuscules, and vesicles was morphologically normal within roots of both mutants. We conclude that auxin signaling within host roots is required for the early stages of AM formation, including during presymbiotic signal exchange.en_US
dc.language.isoen_USen_US
dc.publisherWiley Online Libraryen_US
dc.relation.ispartofNew Phytologisten_US
dc.relation.isversionofhttps://doi.org/10.1111/j.1469-8137.2010.03567.xen_US
dc.rightsThis is the pre-peer reviewed version of the following article: Hanlon, M.T. and Coenen, C. (2010). Genetic evidence for auxin involvement in arbuscular mycorrhiza initiation. New Phytologist, 189(3): 701-709. doi: 10.1111/j.1469-8137.2010.03567.x, which has been published in final form at https://doi.org/10.1111/j.1469-8137.2010.03567.x. This article may be used for non-commercial purposes in accordance with Wiley Terms and Conditions for Use of Self-Archived Versions.en_US
dc.subjectarbuscular mycorrhiza (AM)en_US
dc.subjectauxinen_US
dc.subjectdiageotropicaen_US
dc.subjectGlomus intraradicesen_US
dc.subjectplant hormonesen_US
dc.subjectpolycotyledonen_US
dc.subjectSolanumlycopersicumen_US
dc.subjectsymbiosisen_US
dc.titleGenetic evidence for auxin involvement in arbuscular mycorrhiza initiationen_US
dc.description.versionPublished articleen_US
dc.contributor.departmentBiochemistryen_US
dc.citation.volume189en_US
dc.citation.issue3en_US
dc.citation.spage701en_US
dc.citation.epage709en_US
dc.identifier.doi10.1111/j.1469-8137.2010.03567.x
dc.contributor.avlauthorCoenen, Catharina


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