Interactive Effects of Jasmonic Acid, Salicylic Acid, and Gibberellin on Induction of Trichomes in Arabidopsis
M. Brian Traw,Joy Bergelson +1 more
TLDR
It was found that gibberellin and jasmonic acid had a synergistic effect on the induction of trichomes, suggesting important interactions between these two compounds.Abstract:
Leaf trichomes protect plants from attack by insect herbivores and are often induced following damage. Hormonal regulation of this plant induction response has not been previously studied. In a series of experiments, we addressed the effects of artificial damage, jasmonic acid, salicylic acid, and gibberellin on induction of trichomes in Arabidopsis. Artificial damage and jasmonic acid caused significant increases in trichome production of leaves. The jar1-1 mutant exhibited normal trichome induction following treatment with jasmonic acid, suggesting that adenylation of jasmonic acid is not necessary. Salicylic acid had a negative effect on trichome production and consistently reduced the effect of jasmonic acid, suggesting negative cross-talk between the jasmonate and salicylate-dependent defense pathways. Interestingly, the effect of salicylic acid persisted in the nim1-1 mutant, suggesting that the Npr1/Nim1 gene is not downstream of salicylic acid in the negative regulation of trichome production. Last, we found that gibberellin and jasmonic acid had a synergistic effect on the induction of trichomes, suggesting important interactions between these two compounds.read more
Citations
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Salicylic acid beyond defence: its role in plant growth and development.
TL;DR: The evidence that supports the role of SA during plant growth and development is reviewed by comparing experiments performed by exogenous application of SA with analysis of genotypes affected by SA levels and/or perception.
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The Jasmonate-ZIM-Domain Proteins Interact with the WD-Repeat/bHLH/MYB Complexes to Regulate Jasmonate-Mediated Anthocyanin Accumulation and Trichome Initiation in Arabidopsis thaliana
Tiancong Qi,Susheng Song,Qingcuo Ren,Dewei Wu,Huang Huang,Yan Chen,Meng Fan,Wen Peng,Chunmei Ren,Daoxin Xie +9 more
TL;DR: It is speculated that the JA-induced degradation of Jaz proteins abolishes the interactions of JAZ proteins with bHLH and MYB factors, allowing the transcriptional function of WD-repeat/bHLH/MYB complexes, which subsequently activate respective downstream signal cascades to modulate anthocyanin accumulation and trichome initiation.
Journal ArticleDOI
Learning from halophytes: physiological basis and strategies to improve abiotic stress tolerance in crops.
TL;DR: In this article, a major breakthrough in crop breeding for salinity tolerance was proposed, where stress tolerance genes and mechanisms were identified in extremophiles and then introduced into traditional crops, given the limited range of genetic diversity in this trait within traditional crops.
Journal ArticleDOI
The JAZ Proteins: A Crucial Interface in the Jasmonate Signaling Cascade
Laurens Pauwels,Alain Goossens +1 more
TL;DR: Recent studies on the model plant Arabidopsis thaliana that provided essential and novel insights into JAZ proteins showed the value of protein–protein interaction studies to acquire fundamental insight into molecular signaling pathways.
Journal ArticleDOI
A conserved transcript pattern in response to a specialist and a generalist herbivore
Philippe Reymond,Natacha Bodenhausen,Remco M. P. Van Poecke,Venkatesh Krishnamurthy,Marcel Dicke,Edward E. Farmer +5 more
TL;DR: This study characterized gene expression in damaged as well as in distal Arabidopsis thaliana leaves in response to the specialist insect, Pieris rapae, and provides a robustly characterized gene set for the further investigation of plant–insect interaction.
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TL;DR: Salicylic acid is essential for the development of systemic acquired resistance in tobacco and was investigated in transgenic tobacco plants harboring a bacterial gene encoding salicylate hydroxylase.
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The Arabidopsis NPR1 gene that controls systemic acquired resistance encodes a novel protein containing ankyrin repeats
TL;DR: Transformation of the cloned wild-type NPR1 gene into npr1 mutants not only restored the responsiveness to SAR induction with respect to PR-gene expression and resistance to infections, but also rendered the transgenic plants more resistant to infection by P. syringae in the absence of SAR induction.
Journal ArticleDOI
Cross talk between signaling pathways in pathogen defense
TL;DR: Plant defense in response to microbial attack is regulated through a complex network of signaling pathways that involve three signaling molecules: salicylic acid,jasmonic acid and ethylene.