Leaf uptake of methyl ethyl ketone and croton aldehyde by Castanopsis sieboldii and Viburnum odoratissimum saplings.
Leaf uptake of methyl ethyl ketone and croton aldehyde by Castanopsis sieboldii and Viburnum odoratissimum saplings.
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西氏槠和荚蒾树苗叶片对甲乙酮和巴豆醛的吸收。
DOI：
10.1016/j.atmosenv.2012.12.043
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发表时间：
2013
期刊：
影响因子：
--
通讯作者：
Shimizu S:
中科院分区：
文献类型：
--
作者：
Tani A;Tobe S;Shimizu S:
甲乙酮（MEK）是城市大气中含量丰富的酮，巴豆醛（CA）对眼、鼻、喉有强烈刺激性。使用能够吸收这些化合物的植物是一种建议的缓解方法。为了研究这种方法，我们测定了两个树种，锥和珊瑚树的叶片吸收这些化合物的速率。阿波吹。使用流通室方法，我们发现这些物种能够吸收这两种化合物。我们还证实，这些化合物的吸收率归一化的熏蒸浓度（AN）较高，在较高的光照强度和有ANand气孔导度（GS）为两个树种之间的线性关系。在浓度变化的实验中，MEK和CA的吸收似乎受到限制叶水和空气之间的分配MEK。胞间挥发性有机化合物浓度（Ci）的比例熏蒸浓度（Ca）的CA为零，和范围从0.63到0.76的MEK的比例。更有效的CA吸收能力可能是由于更高的CA分配到叶水。我们目前和以前的研究结果还表明，植物MEK吸收能力是不同的植物物种，这取决于叶片内的VOC转化速度。
Methyl ethyl ketone (MEK) is an abundant ketone in the urban atmosphere and croton aldehyde (CA) is a strong irritant to eye, nose, and throat. The use of plants able to absorb these compounds is one suggested mitigation method. In order to investigate this method, we determined the uptake rate of these compounds by leaves of two tree species, Castanopsis sieboldii and Viburnum odoratissimum var. awabuki. Using a flow-through chamber method, we found that these species were capable of absorbing both compounds. We also confirmed that the uptake rate of these compounds normalized to the fumigated concentration (AN) was higher at higher light intensities and that there was a linear relationship between ANand stomatal conductance (gS) for both tree species. In concentration-varying experiments, the uptake of MEK and CA seemed to be restricted by partitioning of MEK between leaf water and air. The ratio of the intercellular VOC concentration (Ci) to the fumigated concentration (Ca) for CA was zero, and the ratio ranged from 0.63 to 0.76 for MEK. The more efficient CA uptake ability may be the result of higher partitioning of CA into leaf water. Our present and previous results also suggest that plant MEK uptake ability was different across plant species, depending on the VOC conversion speed inside leaves.