Analysis of Arabidopsis JAZ Gene Expression
December 9, 2011| |
A group of plant hormones called jasmonates (JAs) is known to have significant function in various developmental processes as well as in mediating responses to biotic and abiotic stresses. The action of JAs could be manipulated by a number of bacterial strains of Pseudomonas syringae such as the DC3000 strain. This strain secretes coronatine which copies the form of jasmonyl-l-isoleucine (JA-Ile), a key enzyme in the breakdown of JAs. Scientist Agnes Demianski and colleagues at Washington University investigated JA signaling during infection to fully understand the influence of JA-Ile-mediated processes to P. syringae disease susceptibility.
The researchers examined JASMONATE ZIM-DOMAIN (JAZ) gene expression during infection of Arabidopsis by DC3000 and found that 8 out of 12 JAZ genes are stimulated in a coronatine-dependent manner. Most JAZ genes were not dependent on the transcription factor JASMONATE INSENSITIVE1 (JIN1), implying that there are other transcription factors involved in regulating JAZ genes. Further analysis also revealed that JAZ10 is a negative regulator of both JA signaling and disease symptom development.
Read the abstract at http://onlinelibrary.wiley.com/doi/10.1111/j.1364-3703.2011.00727.x/abstract.
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