A comparison of the biogenic volatile organic compound emissions from the fine roots of 15 tree species in Japan and Taiwan
A comparison of the biogenic volatile organic compound emissions from the fine roots of 15 tree species in Japan and Taiwan
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DOI：
10.1080/13416979.2018.1483129
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发表时间：
2018-06
影响因子：
1.5
通讯作者：
Jun Tsuruta;M. Okumura;N. Makita;Y. Kosugi;T. Miyama;T. Kume;S. Tohno
中科院分区：
文献类型：
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作者：
Jun Tsuruta;M. Okumura;N. Makita;Y. Kosugi;T. Miyama;T. Kume;S. Tohno
摘要生物源挥发性有机物（BVOCs）在生物圈-大气相互作用和生物体间的交流中起着重要作用，但对土壤层中BVOCs的特征，特别是细根排放的BVOCs的研究还很少。我们评估了在取样过程中切割两个树种的细根对BVOC排放的影响，并比较了日本和台湾森林中15个树种根部的BVOC和CO2排放率。赤松根系BVOC释放速率随截面数的增加而增加。当赤松根的横截面在样品袋外时，切割处理对BVOC排放速率没有影响。15个树种细根中BVOC的平均排放率范围为0 - 0.38 nmol g− 1 s −1（单萜类）和0 - 0.10 nmol g− 1 s −1（倍半萜类）。一些裸子植物和外生菌根植物细根中的单萜释放速率非常高（赤松0.38 ± 0.31 nmol g− 1 s −1和冷杉0.19 ± 0.08 nmol g− 1 s −1）。细根中长叶烯的释放速率在裸子植物和丛枝菌根植物中最高（豌豆查玛松0.10 ± 0.10 nmol g− 1 s −1）。15个树种细根排放的BVOCs与CO2的比例碳比率在0 ~ 67%之间。明确的BVOC化合物及其排放速率的不同模式表明细根中的物种特异性碳可用性。
ABSTRACT Biogenic volatile organic compounds (BVOCs) play important roles in biosphere‒atmosphere interactions and communications among organisms, although little is known about the characteristics of BVOCs in the pedosphere and particularly emissions from fine roots. We evaluated the effects of cutting the fine roots of two tree species on BVOC emissions during sampling and compared the BVOC and CO2 emission rates in the roots of 15 tree species in forests in Japan and Taiwan. The BVOC emission rate in Pinus densiflora roots increased as the number of cross-sections increased. When the cross-section of a P. densiflora root was outside the sample bag, the BVOC emission rate was not affected by application of a cutting treatment. The mean BVOC emission rates in the fine roots of each of 15 tree species ranged from 0 to 0.38 nmol g−1s−1 for monoterpenes and 0 to 0.10 nmol g−1s−1 for a sesquiterpene (longifolene). The monoterpene emission rates in fine roots were very high for some gymnosperm and ectomycorrhizal species (Pinus densiflora 0.38 ± 0.31 nmol g−1s−1 and Abies firma 0.19 ± 0.08 nmol g−1s−1). The longifolene emission rates in fine roots were highest for one gymnosperm and arbuscular mycorrhizal species (Chamaecyparis pisifera 0.10 ± 0.10 nmol g−1s−1). The proportional carbon ratio of BVOCs to CO2 in emissions from fine roots ranged from 0 to 67% among the 15 tree species. Distinct patterns in the exact BVOC compounds and their emission rates indicated species-specific carbon availability in fine roots.