Chemotaxonomic significance of n-alkane distributions from leaf wax in genus of Sinojackia species (Styracaceae) |
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| Institution: | 1. State Key Laboratory of Biogeology and Environmental Geology, China University of Geosciences, Wuhan 430074, China;2. State Key Laboratory of Geological Processes and Mineral Resources, China University of Geosciences, Wuhan 430074, China;3. School of Environmental Studies, China University of Geosciences, Wuhan 430074, China;1. Pharmacy College, Chengdu University of Traditional Chinese Medicine, The Ministry of Education Key Laboratory of Standardization of Chinese Herbal Medicine, Key Laboratory of Systematic Research, Development and Utilization of Chinese Medicine Resources in Sichuan Province – Key Laboratory Breeding Base of Co-founded by Sichuan Province and MOST, Chengdu, 611137, China;2. Sichuan Academy of Forestry Science, Chengdu, 610068, China;1. Department of Civil & Environmental Engineering & Earth Sciences, University of Notre Dame, 156 Fitzpatrick Hall, Notre Dame, IN 46556, USA;2. School of the Earth, Ocean, and Environment, University of South Carolina, 701 Sumter St., Columbia, SC 29208, USA;1. Institute for Chemistry and Biology of the Marine Environment (ICBM), Carl von Ossietzky University of Oldenburg, P.O. Box 2503, D-26111 Oldenburg, Germany;2. MARUM – Center for Marine Environmental Sciences, University of Bremen, Leobener Straße, D-28359 Bremen, Germany;1. MARUM – Center for Marine Environmental Sciences, University of Bremen, Leobener Straße, Bremen, Germany;2. Department of Geography, University of Leicester, University Road, Leicester LE1 7RH, United Kingdom;3. Centre National de Recherche Scientifique, UMR 5554, Institute des Sciences de l’Evolution de Montpellier, Département Paléoenvironnements, Université Montpellier, Bat.22, CC061, Place Eugène Bataillon, 34095 Montpellier, Cedex 5, France;4. Department of Biological Sciences, University of Cape Town, Rondebosch 7701, Western Cape, South Africa |
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| Abstract: | Sinojackia is a Chinese endemic genus of Styracaceae, containing eight species. The taxonomy of one species, Sinojackia dolichocarpa (≡Changiostyrax dolichocarpa), is controversial. Here we investigate the distribution of leaf wax n-alkanes to clarify the chemotaxonomic position of S. dolichocarpa. Leaf samples of six Sinojackia species from Wuhan Botanical Garden in central China were collected during April, July, and December in 2010 to capture different developmental stages of the epicuticular waxes. Our results show that the waxes of S. dolichocarpa differ from the other five species by having a lower abundance of nC31 but a higher abundance of nC33. Although developmental variations of n-alkane distributions were observed during the sampling periods, cluster analysis based on the percentages of n-alkanes from C27 to C33 separates S. dolichocarpa from the other Sinojackia species. Based on these finding, we suggest S. dolichocarpa is a species independent of the Sinojackia genus. |
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