« Previous AbstractLarge-Scale Targeted Proteomics Using Internal Standard Triggered-Parallel Reaction Monitoring (IS-PRM)    Next AbstractAltered volatile emission of pear trees under elevated atmospheric CO(2) levels has no relevance to pear psyllid host choice »

Mar Drugs

Title:		The effect of polyunsaturated aldehydes on Skeletonema marinoi (Bacillariophyceae): the involvement of reactive oxygen species and nitric oxide
Author(s):		Gallina AA; Brunet C; Palumbo A; Casotti R;
Address:		"Stazione Zoologica Anton Dohrn di Napoli, Villa Comunale, Napoli I80121, Italy. Alessandra.Gallina@colostate.edu. Stazione Zoologica Anton Dohrn di Napoli, Villa Comunale, Napoli I80121, Italy. christophe.brunet@szn.it. Stazione Zoologica Anton Dohrn di Napoli, Villa Comunale, Napoli I80121, Italy. palumbo@szn.it. Stazione Zoologica Anton Dohrn di Napoli, Villa Comunale, Napoli I80121, Italy. raffaella.casotti@szn.it"
Journal Title:		Mar Drugs
Year:		2014
Volume:		20140714
Issue:		7
Page Number:		4165 - 4187
DOI:		10.3390/md12074165
ISSN/ISBN:		1660-3397 (Electronic) 1660-3397 (Linking)
Abstract:		"Nitric oxide (NO) and reactive oxygen species (ROS) production was investigated in the marine diatom, Skeletonema marinoi (SM), exposed to 2E,4E/Z-decadienal (DECA), 2E,4E/Z-octadienal (OCTA), 2E,4E/Z-heptadienal (HEPTA) and a mix of these last two (MIX). When exposed to polyunsaturated aldehydes (PUA), a decrease of NO was observed, proportional to the PUA concentration (85% of the initial level after 180 min with 66 microM DECA). Only OCTA, HEPTA and MIX induced a parallel increase of ROS, the highest (2.9-times the control) with OCTA concentrations twice the EC50 for growth at 24 h (20 muM). The synthesis of carotenoids belonging to the xanthophyll cycle (XC) was enhanced during exposure, suggesting their antioxidant activity. Our data provide evidence that specific pathways exist as a reaction to PUA and that they depend upon the PUA used and/or the diatom species. In fact, Phaeodactylum tricornutum (PT) produces NO in response to DECA, but not to OCTA. We advance the hypothesis that SM perceives OCTA and HEPTA as intra-population infochemicals (as it produces PUA), while PT (non-PUA producing species) perceives them as allelochemicals. The ability to produce and to use PUA as infochemicals may underlie ecological traits of different diatom species and modulate ecological success in natural communities"
Keywords:		Aldehydes/*pharmacology Diatoms/*drug effects/growth & development/metabolism Nitric Oxide/*physiology Photosynthesis Reactive Oxygen Species/*metabolism;
Notes:		"MedlineGallina, Alessandra A Brunet, Christophe Palumbo, Anna Casotti, Raffaella eng Research Support, Non-U.S. Gov't Switzerland 2014/07/16 Mar Drugs. 2014 Jul 14; 12(7):4165-87. doi: 10.3390/md12074165"