title: Involvement of RD20, a member of caleosin family, in ABA-mediated regulation of germination in Arabidopsis thaliana.
abstract: The RD20 gene encodes a member of the caleosin family, which is primarily known to function in the mobilization of seed storage lipids during germination. In contrast to other caleosins, RD20 expression is early-induced by water deficit conditions and we recently provided genetic evidence for its positive role in drought tolerance in Arabidopsis. RD20 is also responsive to pathogen infection and is constitutively expressed in diverse tissues and organs during development suggesting additional roles for this caleosin. This addendum describes further exploration of phenotypic alterations in T-DNA insertional rd20 mutant and knock-out complemented transgenic plants in the context of early development and susceptibility to a phytopathogenic bacteria. We show that the RD20 gene is involved in ABA-mediated inhibition of germination and does not play a significant role in plant defense against Pseudomonas syringae.
authors.affiliation: UMR5546 CNRS-Université Paul Sabatier, Pole de BIotechnologie Végétale, Castanet-Tolosan, France.
authors.forename: Yann
authors.initials: Y
authors.lastname: Aubert
authors.forename: Louis-Jérome
authors.initials: LJ
authors.lastname: Leba
authors.forename: Cécilia
authors.initials: C
authors.lastname: Cheval
authors.forename: Benoit
authors.initials: B
authors.lastname: Ranty
authors.forename: Alain
authors.initials: A
authors.lastname: Vavasseur
authors.forename: Didier
authors.initials: D
authors.lastname: Aldon
authors.forename: Jean-Philippe
authors.initials: JP
authors.lastname: Galaud
mesh_terms: D000040:Abscisic Acid / Q000494:pharmacology*; D017360:Arabidopsis / Q000187:drug effects* / Q000235:genetics / Q000378:metabolism* / Q000382:microbiology; D029681:Arabidopsis Proteins / Q000235:genetics / Q000378:metabolism*; D002135:Calcium-Binding Proteins / Q000235:genetics / Q000378:metabolism*; D018506:Gene Expression Regulation, Plant / Q000187:drug effects / Q000235:genetics; D018525:Germination / Q000187:drug effects* / Q000235:genetics; D044224:Pseudomonas syringae / Q000472:pathogenicity; D036226:Seedlings / Q000187:drug effects / Q000235:genetics / Q000378:metabolism / Q000382:microbiology
chemical_list: D029681:Arabidopsis Proteins; D002135:Calcium-Binding Proteins; C417972:RD20 protein, Arabidopsis; D000040:Abscisic Acid