Oxylipin dynamics inMedicago truncatulain response to saltand wounding stresses
De Domenico, Stefania | Taurino, Marco | Gallo, Antonia | Poltronieri, Palmiro | Pastor, Victoria | Flors, Victor | Santino, Angelo
Multiple stresses are becoming common challenges in modern agriculture dueto environmental changes. A large set of phytochemicals collectively knownas oxylipins play a key role in responses to several stresses. Understandingthe fine-tuned plant responses to multiple and simultaneous stresses couldopen new perspectives for developing more tolerant varieties. We carriedout the molecular and biochemical profiling of genes, proteins and activecompounds involved in oxylipin metabolism in response to single/combinedsalt and wounding stresses onMedicago truncatula. Two new membersbelonging to the CYP74 gene family were identified. Gene expression profilingof each of the six CYP74 members indicated a tissue- and time-specificexpression pattern for each member in response to single/combined saltand wounding stresses. Notably, hormonal profiling pointed to an attenuatedsystemic response upon combined salt and leaf wounding stresses. Combined,these results confirm the important role of jasmonates in legume adaptation toabiotic stresses and point to the existence of a complex molecular cross-talkamong signals generated by multiple stresses.
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