Hubei Key Laboratory of Regional Development and Environmental Response, Faculty of Resource and Environment, Hubei University, Wuhan, 430062, China.
Hubei Key Laboratory of Regional Development and Environmental Response, Faculty of Resource and Environment, Hubei University, Wuhan, 430062, China.
Chemosphere. 2024 Aug;361:142574. doi: 10.1016/j.chemosphere.2024.142574. Epub 2024 Jun 7.
Biogenic volatile organic compounds (BVOCs) emitted by plants serve crucial biological functions and potentially impact atmospheric environment and global carbon cycling. Despite their significance, BVOC emissions from aquatic macrophytes have been relatively understudied. In this study, for the first time we identified there were 68 major BVOCs released from 34 common aquatic macrophytes, and these compounds referred to alcohols, aldehydes, alkanes, alkenes, arenes, ethers, furans, ketones, phenol. For type of BVOC emissions from different life form and phylogenetic group of aquatic macrophytes, 34 of the 68 BVOCs from emergent and submerged macrophytes are classified into alkene and alcohol compounds, over 50% BVOCs from dicotyledon and monocotyledon belong to alcohol and arene compounds. Charophyte and pteridophyte emitted significantly fewer BVOCs than dicotyledon and monocotyledon, and each of them only released 12 BVOCs. These BVOCs may be of great importance for the growth and development of macrophytes, because many BVOCs, such as azulene, (E)-β-farnesene, and dimethyl sulfide are proved to play vital roles in plant growth, defense, and information transmission. Our results confirmed that both life form and phylogenetic group of aquatic macrophytes had significantly affected the BVOC emissions form macrophytes, and suggested that the intricate interplay of internal and external factors that shape BVOC emissions from aquatic macrophytes. Thus, further studies are urgently needed to investigate the influence factors and ecological function of BVOCs released by macrophytes within aquatic ecosystem.
植物释放的生物成因挥发性有机化合物（BVOCs）具有至关重要的生物学功能，并可能影响大气环境和全球碳循环。尽管它们意义重大，但水生植物的 BVOC 排放相对研究较少。在这项研究中，我们首次鉴定出 34 种常见水生植物释放了 68 种主要的 BVOC，这些化合物包括醇、醛、烷烃、烯烃、芳烃、醚、呋喃、酮、酚。对于不同生活型和水生植物系统发育群的 BVOC 排放类型，34 种挺水和沉水植物的 68 种 BVOC 可分为烯烃和醇类化合物，超过 50%的双子叶植物和单子叶植物的 BVOC 属于醇和芳烃类化合物。轮藻和蕨类植物释放的 BVOC 明显少于双子叶植物和单子叶植物，它们每种植物只释放 12 种 BVOC。这些 BVOC 可能对植物的生长和发育非常重要，因为许多 BVOC，如天蓝烃、（E）-β-法呢烯和二甲硫醚，已被证明在植物生长、防御和信息传递中发挥着重要作用。我们的研究结果证实，水生植物的生活型和系统发育群都显著影响了水生植物的 BVOC 排放形式，并表明内部和外部因素的复杂相互作用塑造了水生植物的 BVOC 排放。因此，迫切需要进一步研究水生生态系统中植物释放的 BVOC 的影响因素和生态功能。
