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  • Title: Tobacco mutants with reduced microtubule dynamics are less susceptible to TMV.
    Author: Ouko MO, Sambade A, Brandner K, Niehl A, Peña E, Ahad A, Heinlein M, Nick P.
    Journal: Plant J; 2010 Jun 01; 62(5):829-39. PubMed ID: 20230489.
    Abstract:
    A panel of seven SR1 tobacco mutants (ATER1 to ATER7) derived via T-DNA activation tagging and screening for resistance to a microtubule assembly inhibitor, ethyl phenyl carbamate, were used to study the role of microtubules during infection and spread of tobacco mosaic virus (TMV). In one of these lines, ATER2, alpha-tubulin is shifted from the tyrosinylated into the detyrosinated form, and the microtubule plus-end marker GFP-EB1 moves significantly slower when expressed in the background of the ATER2 mutant as compared with the SR1 wild type. The efficiency of cell-to-cell movement of TMV encoding GFP-tagged movement protein (MP-GFP) is reduced in ATER2 accompanied by a reduced association of MP-GFP with plasmodesmata. This mutant is also more tolerant to viral infection as compared with the SR1 wild type, implying that reduced microtubule dynamics confer a comparative advantage in face of TMV infection.
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