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Int. J. Mol. Sci. 2017, 18(2), 309; doi:10.3390/ijms18020309

Arabidopsis RabF1 (ARA6) Is Involved in Salt Stress and Dark-Induced Senescence (DIS)

1
State Key Laboratory of Crop Genetics and Germplasm Enhancement, Nanjing Agricultural University, Nanjing 210095, China
2
Department of Biological and Environmental Sciences, University of Gothenburg, Box 461, Gothenburg SE40530, Sweden
*
Author to whom correspondence should be addressed.
Academic Editors: Gian-Pietro Di Sansebastiano and Antonio Gaballo
Received: 7 December 2016 / Revised: 21 January 2017 / Accepted: 25 January 2017 / Published: 1 February 2017
(This article belongs to the Special Issue Unconventional Proteins and Membranes Traffic)
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Abstract

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. View Full-Text
Keywords: ARA6; chloroplast; RabF1; salt stress; senescence; vesicle ARA6; chloroplast; RabF1; salt stress; senescence; vesicle
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Yin, C.; Karim, S.; Zhang, H.; Aronsson, H. Arabidopsis RabF1 (ARA6) Is Involved in Salt Stress and Dark-Induced Senescence (DIS). Int. J. Mol. Sci. 2017, 18, 309.

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