Journal
PLANTA
Volume 227, Issue 2, Pages 363-373Publisher
SPRINGER
DOI: 10.1007/s00425-007-0623-y
Keywords
lipoxygenase; Phaseolus; ethylene; H2O2; pathogen; wounding
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Chloroplastic LOXs are implicated in the biosynthesis of oxylipins like jasmonic acid and C-6 volatiles among others. In this study, we isolated the cDNA of a novel chloroplast-targeted Phaseolus vulgaris LOX, (PvLOX6). This gene is highly induced after wounding, non-host pathogen infection, and by signaling molecules as H2O2, SA, ethylene and MeJA. The phylogenetic analysis of PvLOX6 showed that it is closely related to chloroplast-targeted LOX from potato (H1) and tomato (TomLOXC); both of them are implicated in the biosynthesis of C-6 volatiles. Induction of PvLOX6 mRNA by wounding ethylene and jasmonic acid on the one side, and non-host pathogen, salicylic acid on the other indicates that common bean uses the same LOX to synthesize oxylipins in response to different stresses.
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