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Arabidopsis RabF1 (ARA6) is involved in salt stress and dark-induced senescence (DIS)

Journal article
Authors Congfei Yin
Sazzad Karim
Hongsheng Zhang
Henrik Aronsson
Published in International Journal of Molecular Sciences
Volume 18
Issue 2
ISSN 1661-6596
Publication year 2017
Published at Department of Biological and Environmental Sciences
Language en
Links dx.doi.org/10.3390/ijms18020309
Keywords ARA6, Chloroplast, RabF1, Salt stress, Senescence, Vesicle
Subject categories Cell and molecular biology, Botany, Cell Biology

Abstract

© 2017 by the authors.Arabidopsis small GTPase RabF1 (ARA6) functions in endosomal vesicle transport and may play a crucial role in recycling and degradation of molecules, thus involved in stress responses. Here we have reported that complementary overexpression lines RabF1OE (overexpression), GTPase mutants RabF1Q93L (constitutively active) and RabF1S47N (dominant negative) lines show longer root growth than wild-type, rabF1 knockout and N-myristoylation deletion (Δ1−29, N-terminus) complementary overexpression mutant plants under salt induced stress, which indicates that N-myristoylation of RabF1 is indispensable for salt tolerance. Moreover, RabF1 is highly expressed during senescence and RabF1OE lines were more tolerant of dark-induced senescence (DIS) than wild-type and rabF1.

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