生态学杂志2024，Vol.43Issue(11)：3266-3274,9.DOI:10.13292/j.1000-4890.202411.026
急性O3胁迫下米槠类异戊二烯释放及其对O3生成潜势的影响
Isoprenoid release from Castanopsis carlesii under acute O3 stress and its effect on ozone formation poten-tial
摘要
Abstract
Isoprenoids,mainly including isoprene and monoterpenes,are among the most important biogenic vola-tile organic compounds(BVOCs)from plants and play an important role in atmospheric environments.In this study,Castanopsis carlesii was treated with O3-CK(ambient O3 concentration),O3-25O(O3 concentration 250 ppb)and O3-500(O3 concentration 500 ppb)for acute O3 stress of 8 h and 16 h.We investigated the effects of acute O3 stress on BVOc emissions from C.carlesii and the associated physiological parameters,as well as the contribu-tion of BVOC emissions to ozone formation potential(OFP).The results showed that after 8 h acute O3 stress,the release rate of monoterpene was higher under the treatment with O3 stress than that of the control group,and reached a peak at O3-250 treatment(52.72±35.72 pmol·m-2·s-1),while the release rate of isoprene was lower than that of the control group.At the O3-250 treatment,it decreased to the lowest(0.70±0.27 pmol·m-2·s-1).The contents of γ-terpinene and limonene increased significantly,and α-pinene and limonene contributed more to OFP.After 16 h acute O3 stress,the release rate of monoterpene under O3 stress was higher than that of the control group,but the release rate of isoprene did not change.The content of 3-carene increased significantly,and α-pi-nene,limonene,3-carene contributed more to OFP.Monoterpene synthetase and isopentadiene synthetase de-creased significantly under O3 stress.Photosynthetic rate of C.carlesii and release rate of monoterpene and isopenta-diene decreased with increasing stress time.Acute O3 stress promoted monoterpene emission and inhibited isoprene emission,with a positive effect on OFP as a whole.This study can provide theoretical basis for future studies on the response of BVOC release to O3 under the trend of near-surface O3 concentration increase and the mechanism of BVOCs on O3 formation.关键词
臭氧/异戊二烯/单萜烯/生物源挥发性有机化合物/臭氧生成潜势Key words
ozone(O3)/isoprene/monoterpenes/biogenic volatile organic compounds(BVOCs)/ozone forma-tion potential(OFP)引用本文复制引用
廖露露,张哿烨,张峻川,陈红梅,李强,易志刚..急性O3胁迫下米槠类异戊二烯释放及其对O3生成潜势的影响[J].生态学杂志,2024,43(11):3266-3274,9.基金项目
国家自然科学基金项目(41877326)和福建农林大学科技创新专项基金项目(KFB23115)资助. （41877326）
