Descendants of primed arabidopsis plants exhibit resistance to biotic stress
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http://dx.doi.org/10.1104/pp.111.191593 |
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Title
Descendants of primed arabidopsis plants exhibit resistance to biotic stressAuthor (s)
Date
2012Publisher
American Society of Plant BiologistsISSN
0032-0889; 1532-2548Type
info:eu-repo/semantics/articlePublisher version
http://www.plantphysiol.org/content/158/2/835.full.pdf+htmlAbstract
An attack of plants by pathogens or treatment with certain resistance-inducing compounds can lead to the establishment of a
unique primed state of defense. Primed plants show enhanced defense reactions upon further ... [+]
An attack of plants by pathogens or treatment with certain resistance-inducing compounds can lead to the establishment of a
unique primed state of defense. Primed plants show enhanced defense reactions upon further challenge with biotic or abiotic
stress. Here, we report that the primed state in Arabidopsis (Arabidopsis thaliana) is still functional in the next generation
without additional treatment. We compared the reactions of Arabidopsis plants that had been either primed with b-aminobutyric acid (BABA) or with an avirulent isolate of the bacteria Pseudomonas syringae pv tomato (PstavrRpt2). The descendants of
primed plants showed a faster and higher accumulation of transcripts of defense-related genes in the salicylic acid signaling
pathway and enhanced disease resistance upon challenge inoculation with a virulent isolate of P. syringae. In addition, the
progeny of primed plants was also more resistant against the oomycete pathogen Hyaloperonospora arabidopsidis. When
transgenerationally primed plants were subjected to an additional priming treatment, their descendants displayed an even
stronger primed phenotype, suggesting that plants can inherit a sensitization for the priming phenomenon. Interestingly, this
primed to be primed phenotype was much reduced in the Arabidopsis b-amino-butyric acid priming mutant ibs1 (induced
BABA sterility1). Our results demonstrate that the primed state of plants is transferred to their progeny and confers improved
protection from pathogen attack as compared to the descendants of unprimed plants. [-]
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Plant Physiology, february 2012, Vol. 158Rights
© 2011 American Society of Plant Biologists. All Rights Reserved.
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