Monoterpene emissions from needles of hybrid larch F1 (Larix gmelinii var. japonica × Larix kaempferi) grown under elevated carbon dioxide and ozone.
Monoterpene emissions from needles of hybrid larch F1 (Larix gmelinii var. japonica × Larix kaempferi) grown under elevated carbon dioxide and ozone.
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在二氧化碳和臭氧升高的条件下生长的杂交落叶松 F1（Larix gmelinii var. japonica × Larix kaempferi）针叶的单萜排放。
DOI：
10.1016/j.atmosenv.2016.10.041
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发表时间：
2017
影响因子：
5
通讯作者：
and Tani A
中科院分区：
文献类型：
--
作者：
Mochizuki T;Watanabe M;Koike T;and Tani A
通过测定杂种落叶松F1针叶的单萜排放，研究了单萜排放速率及其组成对CO2（600 μmol mol-1）和O3（60 nmol-1）浓度升高的响应。单萜成分以α-蒎烯和β-蒎烯为主。CO2浓度升高显著降低了总单萜的释放速率（P<0. 05）。在CO2浓度升高的条件下，单萜类化合物的碳排放量与光合固定碳的比例也显著降低。与此相反，O3浓度升高并没有显着影响总单萜的排放速率。O3暴露显著降低了α-蒎烯/β-蒎烯、柠檬烯/β-蒎烯和月桂烯/β-蒎烯的比值（P< 0.05）。α-蒎烯、柠檬烯和月桂烯与O3结合时的高反应性可能能够减轻落叶松针叶内的氧化损伤。没有显着的CO2和O3浓度升高对单个或总单萜排放量的综合影响进行检测。
We measured monoterpene emissions from needles of hybrid larch F1(Larix gmeliniivar.japonica×Larix kaempferi) to evaluate the response of monoterpene emission rates and their composition to elevated CO2(600 μmol mol−1) and O3(60 nmol mol−1) conditions. The dominant monoterpenes were α-pinene and β-pinene. The emission rate of total monoterpenes significantly decreased under elevated CO2conditions (P< 0.05). The ratio of carbon emission in the form of monoterpenes to photosynthetically fixed carbon also significantly decreased under elevated CO2conditions. By contrast, elevated O3did not significantly affect the emission rate of total monoterpenes. The ratios of α-pinene/β-pinene, limonene/β-pinene, and myrcene/β-pinene were all significantly decreased by O3exposure (P< 0.05). High reactivity of α-pinene, limonene, and myrcene when combining with O3may be able to mitigate oxidative damage inside the larch needles. No significant combined effects of elevated CO2and O3on individual or total monoterpene emissions were detected.