Hormone concentrations in tobacco roots change during arbuscular mycorrhizal colonization with Glomus intraradices

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dc.contributor.authorOrna Shaul-Keinan
dc.contributor.authorVijay Gadkar
dc.contributor.authorIdit Ginzberg
dc.contributor.authorJose M. Grunzweig
dc.contributor.authorIlan Chet
dc.contributor.authorYigal Elad
dc.contributor.authorSmadar Wininger
dc.contributor.authorEdi Belausov
dc.contributor.authorYuval Eshed
dc.contributor.authorNir Atzmon
dc.contributor.authorYossi Ben-Tal
dc.contributor.authorYoram Kapulnik
dc.date.accessioned2014-07-25T05:52:00Z
dc.date.available2014-07-25T05:52:00Z
dc.date.issued2002
dc.description.abstractPhytohormones are known to play a pivotal role In various developmental processes In plants and in arbuscular-mycorrhizal (AM) fungal-host symbiosis. This study focuses on characterizing the changes In the concentrations of auxins, cytokinlns and gibberellins in tobacco (Nicotiana tabacum) during the early stages of colonization by Clomus intraradices, using advanced analytical detection techniques. • High-pressure liquid chromatography analysis followed by radioimmunoassay detection revealed that AM colonization induced the accumulation of specific zeatin riboside-like and isopentenyl adenosine-like compounds in both roots and shoots. • Use of the gas chromatography-mass spectrometry technique on the same developmental stage revealed that gibberellins (GA) of the earl-13-hydroxylation bio-synthetic pathway (GA,,, GAg, GA19 and GA20) were significantly more abundant in roots, but not shoots, of AM inoculated plants than in those of nonmycorrhlzal plants. Indoleacetic acid concentrations (total and free) remained unaltered by AM colonization. • This study demonstrates that hormonal changes do occur during AM symbiosis with tobacco, before the fungal benefits manifest.en_US
dc.identifier.citationNew Phytologist(2002) 154: 501-507en_US
dc.identifier.urihttp://hdl.handle.net/123456789/4383
dc.language.isoenen_US
dc.subjectauxinsen_US
dc.subjectcytokininsen_US
dc.subjectgibberellinsen_US
dc.subjectphytohormonesen_US
dc.subjectarbuscular mycorrhizal fungien_US
dc.subjecttobaccoen_US
dc.subjectNicotiana tabacumen_US
dc.titleHormone concentrations in tobacco roots change during arbuscular mycorrhizal colonization with Glomus intraradicesen_US
dc.typeArticleen_US

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