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Molecules

Title:		Detailed Chemical Prospecting of Volatile Organic Compounds Variations from Adriatic Macroalga Halopteris scoparia
Author(s):		Cagalj M; Radman S; Simat V; Jerkovic I;
Address:		"Department of Marine Studies, University of Split, Rudera Boskovica 37, 21000 Split, Croatia. Department of Organic Chemistry, Faculty of Chemistry and Technology, University of Split, Rudera Boskovica 35, 21000 Split, Croatia"
Journal Title:		Molecules
Year:		2022
Volume:		20220805
Issue:		15
Page Number:		-
DOI:		10.3390/molecules27154997
ISSN/ISBN:		1420-3049 (Electronic) 1420-3049 (Linking)
Abstract:		"The present study aimed to isolate volatile organic compounds (VOCs) from fresh (FrHSc) and air-dried (DrHSc) Halopteris scoparia (from the Adriatic Sea) by headspace solid-phase microextraction (HS-SPME) and hydrodistillation (HD) and to analyse them by gas chromatography and mass spectrometry (GC-MS). The impact of the season of growth (May-September) and air-drying on VOC composition was studied for the first time, and the obtained data were elaborated by principal component analysis (PCA). The most abundant headspace compounds were benzaldehyde, pentadecane (a chemical marker of brown macroalgae), and pentadec-1-ene. Benzaldehyde abundance decreased after air-drying while an increment of benzyl alcohol after drying was noticed. The percentage of pentadecane and heptadecane increased after drying, while pentadec-1-ene abundance decreased. Octan-1-ol decreased from May to September. In HD-FrHSc, terpenes were the most abundant in June, July, and August, while, in May and September, unsaturated aliphatic compounds were dominant. In HD-DrHSc terpenes, unsaturated and saturated aliphatic compounds dominated. (E)-Phytol was the most abundant compound in HD-FrHSc through all months except September. Its abundance increased from May to August. Two more diterpene alcohols (isopachydictyol A and cembra-4,7,11,15-tetraen-3-ol) and sesquiterpene alcohol gleenol were also detected in high abundance. Among aliphatic compounds, the dominant was pentadec-1-ene with its peak in September, while pentadecane was present with lower abundance. PCA (based on the dominant compound analyses) showed distinct separation of the fresh and dried samples. No correlation was found between compound abundance and temperature change. The results indicate great seasonal variability of isolated VOCs, as well among fresh and dried samples, which is important for further chemical biodiversity studies"
Keywords:		Alcohols/analysis Benzaldehydes *Phaeophyta/chemistry *Scoparia *Seaweed Solid Phase Microextraction/methods Terpenes *Volatile Organic Compounds/analysis (E)-phytol air-drying benzaldehyde brown macroalgae diterpene alcohols gas chromatography and mass s;
Notes:		"MedlineCagalj, Martina Radman, Sanja Simat, Vida Jerkovic, Igor eng KK.01.1.1.01.0002/The Croatian Government and the European Union (European Regional Development Fund-the Competitiveness and Cohesion Operational Program-KK.01.1.1.01) through project Bioprospecting of the Adriatic Sea granted to The Scienti fi c Centre of Excel-lence for Mar/ 1467/the PRIMA program under project BioProMedFood, funded by the European Union/ Switzerland 2022/08/13 Molecules. 2022 Aug 5; 27(15):4997. doi: 10.3390/molecules27154997"