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Sci Rep

Title:		Volatile diterpene emission by two Mediterranean Cistaceae shrubs
Author(s):		Yanez-Serrano AM; Fasbender L; Kreuzwieser J; Dubbert D; Haberstroh S; Lobo-do-Vale R; Caldeira MC; Werner C;
Address:		"Ecosystem Physiology, University Freiburg, Freiburg, Germany. ana.yanez.serrano@cep.uni-freiburg.de. Ecosystem Physiology, University Freiburg, Freiburg, Germany. Centro de Estudos Florestais, Instituto Superior de Agronomia, Universidade de Lisboa, Tapada da Ajuda, Lisboa, Portugal"
Journal Title:		Sci Rep
Year:		2018
Volume:		20180501
Issue:		1
Page Number:		6855 -
DOI:		10.1038/s41598-018-25056-w
ISSN/ISBN:		2045-2322 (Electronic) 2045-2322 (Linking)
Abstract:		"Mediterranean vegetation emits a wide range of biogenic volatile organic compounds (BVOCs) among which isoprenoids present quantitatively the most important compound class. Here, we investigated the isoprenoid emission from two Mediterranean Cistaceae shrubs, Halimium halimifolium and Cistus ladanifer, under controlled and natural conditions, respectively. For the first time, diurnal emission patterns of the diterpene kaurene were detected in real-time by Proton-Transfer-Reaction-Time-of-Flight-Mass-Spectrometer. Kaurene emissions were strongly variable among H. halimifolium plants, ranging from 0.01 +/- 0.003 to 0.06 +/- 0.01 nmol m(-2) s(-1) in low and high emitting individuals, respectively. They were in the same order of magnitude as monoterpene (0.01 +/- 0.01 to 0.11 +/- 0.04 nmol m(-2) s(-1)) and sesquiterpene (0.01 +/- 0.01 to 0.52 nmol m(-2) s(-1)) emission rates. Comparable range and variability was found for C. ladanifer under natural conditions. Labelling with (13)C-pyruvate suggested that emitted kaurene was not derived from de novo biosynthesis. The high kaurene content in leaves, the weak relationship with ecophysiological parameters and the tendency of higher emissions with increasing temperatures in the field indicate an emission from storage pools. This study highlights significant emissions of kaurene from two Mediterranean shrub species, indicating that the release of diterpenes into the atmosphere should probably deserve more attention in the future"
Keywords:		"Atmosphere/*chemistry Circadian Rhythm Cistus/*metabolism *Diterpenes, Kaurane/analysis/metabolism Ecosystem Monoterpenes/analysis/metabolism Plant Leaves/*metabolism Portugal Sesquiterpenes/analysis/metabolism Temperature *Volatile Organic Compounds/anal;"
Notes:		"MedlineYanez-Serrano, A M Fasbender, L Kreuzwieser, J Dubbert, D Haberstroh, S Lobo-do-Vale, R Caldeira, M C Werner, C eng Research Support, Non-U.S. Gov't England 2018/05/03 Sci Rep. 2018 May 1; 8(1):6855. doi: 10.1038/s41598-018-25056-w"