Influence of physiological and environmental factors on the diurnal variation in emissions of biogenic volatile compounds from Pinus tabuliformis
Influence of physiological and environmental factors on the diurnal variation in emissions of biogenic volatile compounds from Pinus tabuliformis
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生理和环境因素对油松生物挥发性化合物排放日变化的影响
DOI：
10.1016/j.jes.2019.01.020
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发表时间：
2019-07-01
影响因子：
6.9
通讯作者：
Liao, Wenchao
中科院分区：
文献类型：
--
作者：
Chen, Jungang;Bi, Huaxing;Liao, Wenchao
生物挥发性有机化合物（BVOCs）对大气环境质量、气候变化和碳循环具有重要影响。本研究采用围封技术对油松BVOCs的组成和日变化规律进行了研究。环境参数（温度和光强）和生理参数(净光合速率，P-n；气孔导度，g(s)；细胞间CO2浓度C-i；连续监测可能影响排放行为的蒸腾速率（T-r）。采用气相色谱-质谱联用技术，对油棕所释放的10个最丰富的化合物基团进行了分类。主要的单萜类化合物是-蒎烯、-月桂烯、-法尼烯和柠檬烯。BVOCs的日排放率随温度和光照强度的变化而变化，对BVOCs排放的动态分析表明，温度对其排放率的影响大于光照对其排放率的影响。单萜排放率的变化与P-n、g(s)和T-r的估计一致。在30℃时，主要挥发性有机化合物的基础排放率范围为0.006 ~ 0.273 μ g(-1)/(hr g)，而基础ER标准化系数范围为0.049 ~ 0.144℃-1。总体而言，这些结果为树种的有效选择和配置，以有效防治大气污染提供了详细的参考。(C) 2019中国科学院生态环境科学研究中心Elsevier B.V.出版
Biological volatile organic compounds (BVOCs) have a large influence on atmospheric environmental quality, climate change and the carbon cycle. This study assesses the composition and diurnal variation in emission rates of BVOCs from Pinus tabuliformis, using an enclosure technique. Environmental parameters (temperature and light intensity) and physiological parameters (net photosynthetic rate, P-n; stomatal conductance, g(s); intercellular CO2 concentration, C-i; and transpiration rate, T-r) that may affect emission behavior were continuously monitored. The 10 most abundant compound groups emitted by P. tabuliformis were classified by gas chromatography-mass spectrometry. The dominant monoterpenoid compounds emitted were alpha-pinene, beta-myrcene, alpha-farnesene and limonene. The diurnal emission rate of BVOCs changed with temperature and light intensity, with dynamic analysis of BVOCs emissions revealing that their emission rates were more affected by temperature than light. The variation in monoterpene emission rates was consistent with estimates of P-n, g(s) and T-r. Basal emission rates (at 30 degrees C,) of the main BVOCs ranged from 0.006 to 0.273 mu g(-1)/(hr g), while the basal ER standardization coefficients ranged from 0.049 to 0.144 degrees C-1. Overall, these results provide a detailed reference for the effective selection and configuration of tree species to effectively prevent and control atmospheric pollution. (C) 2019 The Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences. Published by Elsevier B.V.