Title: Molecular mechanisms involved in induced resistance signaling in Arabidopsis
Abstract:Evolution has provided plants with sophisticated defensive strategies
to perceive attack by pathogens and insects, and to translate that
perception into an appropriate adaptive response. Plant innat...Evolution has provided plants with sophisticated defensive strategies
to perceive attack by pathogens and insects, and to translate that
perception into an appropriate adaptive response. Plant innate
immunity is based on a surprisingly complex response that is highly
flexible in its capacity to recognize and respond to the invader
encountered. In the past years, we explored Arabidopsis as a model to
study the molecular basis of rhizobacteria-induced systemic resistance
(ISR). We discovered novel components of the ISR signaling pathway
and revealed that priming for augmented expression of pathogenresponsive
genes plays an important role in this type of induced
resistance. Currently our research is also focused on the question: how
are plants capable of integrating microbial- and insect-induced signals
into defense responses that are specifically directed against the attacker?
The alarm signals salicylic acid (SA), jasmonic acid (JA) and ethylene
(ET) are major regulators of plant defense. Their signaling pathways
cross-communicate, providing the plant with a regulatory potential to
fine-tune its defense reaction. We discovered that the regulatory protein
NPR1 functions as a modulator in cross-talk between SA and JA,
thereby helping the plant to decide which defensive strategy to follow,
depending on the type of attacker encountered, and that this function of NPR1 is conserved among Arabidopsis accessions all over the world,
suggesting an importany role for plant survival.Read More
Publication Year: 2006
Publication Date: 2006-01-01
Language: en
Type: article
Access and Citation
Cited By Count: 1
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