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Buschmann, H. ; Fabri, C.O. ; Hauptmann, M. ; Hutzler, P. ; Laux, Th.* ; Lloyd, C.W.* ; Schäffner, A.

Helical growth of the Arabidopsis mutant tortifolia1 reveals a plant-specific microtubule-associated protein.

Curr. Biol. 14, 1515-1521 (2004)
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Plants can grow straight or in the twisted fashion exhibited by the helical growth of some climbing plants. Analysis of helical-growth mutants from Arabidopsis has indicated that microtubules are involved in the expression of the helical phenotype. Arabidopsis mutants growing with a right-handed twist have been reported to have cortical microtubules that wind around the cell in left-handed helices and vice versa [1–3] . Microtubular involvement is further suspected from the finding that some helical mutants are caused by single amino acid substitutions in α-tubulin and because of the sensitivity of the growth pattern to anti-microtubule drugs. Insight into the roles of microtubules in organ elongation is anticipated from analyses of genes defined by helical mutations [4] . We investigated the helical growth of the Arabidopsis mutant tortifolia1/spiral2 (tor1/spr2), which twists in a right-handed manner, and found that this correlates with a complex reorientation of cortical microtubules. TOR1 was identified by a map-based approach; analysis of the TOR1 protein showed that it is a member of a novel family of plant-specific proteins containing N-terminal HEAT repeats. Recombinant TOR1 colocalizes with cortical microtubules in planta and binds directly to microtubules in vitro. This shows that TOR1 is a novel, plant-specific microtubule-associated protein (MAP) that regulates the orientation of cortical microtubules and the direction of organ growth.
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Publikationstyp Artikel: Journalartikel
Dokumenttyp Wissenschaftlicher Artikel
Sprache englisch
Veröffentlichungsjahr 2004
HGF-Berichtsjahr 0
ISSN (print) / ISBN 0960-9822
e-ISSN 1879-0445
Zeitschrift Current Biology
Quellenangaben Band: 14, Heft: 16, Seiten: 1515-1521 Artikelnummer: , Supplement: ,
Verlag Elsevier
Begutachtungsstatus Peer reviewed
POF Topic(s)
30202 - Environmental Health
Forschungsfeld(er) Enabling and Novel Technologies
Environmental Sciences
PSP-Element(e) FE 70332
G-504900-002
Erfassungsdatum 2004-09-27