Acquired resistance in Arabidopsis.
Acquired resistance is an important component of the complex disease resistance mechanism in plants, which can result from either pathogen infection or treatment with synthetic, resistance-inducing compounds. In this study, Arabidopsis, a tractable genetic system, is shown to develop resistance to a bacterial and a fungal pathogen following 2,6-dichloroisonicotinic acid (INA) treatment. Three proteins that accumulated to high levels in the apoplast in response to INA treatment were purified and characterized. Expression of the genes corresponding to these proteins was induced by INA, pathogen infection, and salicylic acid, the latter being a putative endogenous signal for acquired resistance. Arabidopsis should serve as a genetic model for studies of this type of immune response in plants.
Uknes
S
S
Agricultural Biotechnology Research Unit, CIBA-GEIGY Corporation, Research Triangle Park, North Carolina 27709.
Mauch-Mani
B
B
Moyer
M
M
Potter
S
S
Williams
S
S
Dincher
S
S
Chandler
D
D
Slusarenko
A
A
Ward
E
E
Ryals
J
J
D000595:Amino Acid Sequence; D017360:Arabidopsis / Q000187:drug effects / Q000235:genetics / Q000276:immunology* / Q000382:microbiology; D029681:Arabidopsis Proteins; D001483:Base Sequence; D003001:Cloning, Molecular; D004247:DNA; D015870:Gene Expression / Q000187:drug effects; D007539:Isonicotinic Acids / Q000494:pharmacology; D007700:Kinetics; D008969:Molecular Sequence Data; D009868:Oomycetes / Q000502:physiology; D010940:Plant Proteins / Q000235:genetics* / Q000378:metabolism*; D011549:Pseudomonas / Q000502:physiology; D017386:Sequence Homology, Amino Acid
D029681:Arabidopsis Proteins; D007539:Isonicotinic Acids; D010940:Plant Proteins; C077262:PR-1 protein, Arabidopsis; C077263:BG2 protein, Arabidopsis; C077264:PR-5 protein, Arabidopsis; C077261:2,6-dichloroisonicotinic acid; D004247:DNA