Seasonal shifts in isoprenoid emission composition from three hyperdominant tree species in central Amazonia
Seasonal shifts in isoprenoid emission composition from three hyperdominant tree species in central Amazonia
复制标题
亚马逊流域中部三种超优势树种类异戊二烯排放成分的季节性变化
DOI：
10.1111/plb.13419
复制
发表时间：
2022
期刊：
影响因子：
3.9
通讯作者：
Gonçalves, J. F.
中科院分区：
文献类型：
--
作者：
Gomes Alves, E.;Taylor, T.;Robin, M.;Pinheiro Oliveira, D.;Schietti, J.;Duvoisin Júnior, S.;Zannoni, N.;Williams, J.;Hartmann, C.;Gonçalves, J. F.
• 挥发性类异戊二烯调节植物性能和大气过程，亚马逊森林是全球大气的主要来源。尽管如此，人们对类异戊二烯排放能力如何随亚马逊生态系统的生态生理和环境控制而变化的了解仍知之甚少。• 我们测量了亚马逊中部三种优势树种（Protium hebetatum、Eschweilera grandiflora、Eschweilera coriacea）的类异戊二烯排放能力。• 从湿季到干季，光合作用和异戊二烯排放能力都很强。下降，而较重的类异戊二烯：单萜和倍半萜的排放量增加。跨栖息地的可塑性在白花蕈中最为明显，它只在旱季释放倍半萜，其释放率沿着从白沙（浅根水通道）到高地（深地下水位）的水文地形梯度显着增加。
• Volatile isoprenoids regulate plant performance and atmospheric processes, and Amazon forests comprise the dominant source to the global atmosphere. Still, there is a poor understanding of how isoprenoid emission capacities vary in response to ecophysiological and environmental controls in Amazonian ecosystems.• We measured isoprenoid emission capacities of three Amazonian hyperdominant tree species–Protium hebetatum, Eschweilera grandiflora, Eschweilera coriacea–across seasons and along a topographic and edaphic environmental gradient in the central Amazon.• From wet to dry season, both photosynthesis and isoprene emission capacities strongly declined, while emissions increased among the heavier isoprenoids: monoterpenes and sesquiterpenes. Plasticity across habitats was most evident in P. hebetatum, which emitted sesquiterpenes only in the dry season, at rates that significantly increased along the hydro-topographic gradient from white sands (shallow root water access) to uplands (deep water table).