| Title: | Diel rhythms in the volatile emission of apple and grape foliage |
| Author(s): | Giacomuzzi V; Cappellin L; Nones S; Khomenko I; Biasioli F; Knight AL; Angeli S; |
| Address: | "Faculty of Science and Technology, Free University of Bozen-Bolzano, Piazza Universita 5, 39100 Bolzano, Italy. Research and Innovation Centre, Fondazione Edmund Mach (FEM), Via E. Mach 1, 38010 San Michele all'Adige, Italy; School of Engineering and Applied Sciences, Harvard University, 29 Oxford Street, 02138 Cambridge, Massachusetts, USA. Research and Innovation Centre, Fondazione Edmund Mach (FEM), Via E. Mach 1, 38010 San Michele all'Adige, Italy. USDA, Agricultural Research Service, 5230 Konnowac Pass Rd, 98951 Wapato, Washington, USA. Faculty of Science and Technology, Free University of Bozen-Bolzano, Piazza Universita 5, 39100 Bolzano, Italy. Electronic address: sergio.angeli@unibz.it" |
| DOI: | 10.1016/j.phytochem.2017.03.001 |
| ISSN/ISBN: | 1873-3700 (Electronic) 0031-9422 (Linking) |
| Abstract: | "This study investigated the diel emission of volatile organic compounds (VOCs) from intact apple (Malus x domestica Borkh., cv. Golden Delicious) and grape (Vitis vinifera L., cv. Pinot Noir) foliage. Volatiles were monitored continuously for 48 h by proton transfer reaction - time of flight - mass spectrometry (PTR-ToF-MS). In addition, volatiles were collected by closed-loop-stripping-analysis (CLSA) and characterized by gas chromatography-mass spectrometry (GC-MS) after 1 h and again 24 and 48 h later. Fourteen and ten volatiles were characterized by GC-MS in apple and grape, respectively. The majority of these were terpenes, followed by green leaf volatiles, and aromatic compounds. The PTR-ToF-MS identified 10 additional compounds and established their diel emission rhythms. The most abundant volatiles displaying a diel rhythm included methanol and dimethyl sulfide in both plants, acetone in grape, and mono-, homo- and sesquiterpenes in apple. The majority of volatiles were released from both plants during the photophase; whereas methanol, CO(2), methyl-butenol and benzeneacetaldehyde were released at significantly higher levels during the scotophase. Acetaldehyde, ethanol, and some green leaf volatiles showed distinct emission bursts in both plants following the daily light switch-off. These new results obtained with a combined analytical approach broaden our understanding of the rhythms of constitutive volatile release from two important horticultural crops. In particular, diel emission of sulfur and nitrogen-containing volatiles are reported here for the first time in these two crops" |
| Keywords: | "*Circadian Rhythm Gas Chromatography-Mass Spectrometry Malus/*chemistry Plant Leaves/chemistry Terpenes/analysis Vitis/*chemistry Volatile Organic Compounds/*analysis (E)-4, 8-dimethyl-1, 3, 7-nonatriene (PubChem CID: 6449967) (E)-beta-ocimene (PubChem CID:;" |
| Notes: | "MedlineGiacomuzzi, Valentino Cappellin, Luca Nones, Stefano Khomenko, Iuliia Biasioli, Franco Knight, Alan L Angeli, Sergio eng England 2017/03/16 Phytochemistry. 2017 Jun; 138:104-115. doi: 10.1016/j.phytochem.2017.03.001. Epub 2017 Mar 11" |
