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Recent findings that receptor complexes for auxin and jasmonate bind inositol polyphosphates stimulated the idea that plant hormone perception is regulated by inositol-derived molecules (Tan et al., 2007; Sheard et al., 2010). Inositol polyphosphates regulate critical cellular functions in eukaryotic cells (Munnik and Nielsen, 2011; Munnik and Vermeer, 2010; Gillaspy, 2013; Tsui and York, 2010;...
The genes and pathways AG regulates in late-stage flower development are largely unknown. Several putative downstream genes of AG involved in anther dehiscence were identified, including DAD1, MYB26, OPR3, COI1, and RBR1, through a bioinformatics approach. A 35S::AG-GR inducible line was constructed for timed-induction expression analysis of anther dehiscence versus indehiscence, which revealed...
Despite their different lifestyles, animals and plants share the dependence on small molecules, hormones, for systemic regulation of development and other cellular processes. The hormones act through specific receptors, either through triggering secondary signaling cascades or through direct effect of the nuclear receptor complexes on gene transcription (1). Plant hormones, however, use differe...
Jasmonates (JAs) inhibit plant growth and induce plant defense responses. To define genes in the Arabidopsis JA signal pathway, we screened for mutants with constitutive expression of a luciferase reporter for the JA-responsive promoter from the vegetative storage protein gene VSP1. One mutant, named constitutive expression of VSP1 (cev1), produced plants that were smaller than wild type, had s...
The phytotoxin coronatine (COR) promotes various aspects of Pseudomonas syringae virulence, including invasion through stomata, growth in the apoplast, and induction of disease symptoms. COR is a structural mimic of active jasmonic acid (JA) conjugates. Known activities of COR are mediated through its binding to the F-box–containing JA coreceptor CORONATINE INSENSITIVE1. By analyzing the intera...
The coronatine toxin of Pseudomonas syringae is a multifunctional suppressor of Arabidopsis defense.
The phytotoxin coronatine (COR) promotes various aspects of Pseudomonas syringae virulence, including invasion through stomata, growth in the apoplast, and induction of disease symptoms. COR is a structural mimic of active jasmonic acid (JA) conjugates. Known activities of COR are mediated through its binding to the F-box-containing JA coreceptor CORONATINE INSENSITIVE1. By analyzing the intera...
Activated forms of jasmonic acid (JA) are central signals coordinating plant responses to stresses, yet tools to analyse their spatial and temporal distribution are lacking. Here we describe a JA perception biosensor termed Jas9-VENUS that allows the quantification of dynamic changes in JA distribution in response to stress with high spatiotemporal sensitivity. We show that Jas9-VENUS abundance...
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