Isoprene, Chlorophyll fluorescence, and leaf temperature data from Manaus, Brazil, 2017 - 2018

The data included in this data package are a demonstration of an inverse relationship in the early successional species Vismia guianensis in the central Amazon between stomatal conductance (gs) and leaf temperature, while net photosynthesis (Pn) showed an optimum value of 32.6 ± 0.4°C. In contrast to Pn, photosynthetic electron transport rates (ETR) and the QA oxidation state (qL) increased linearly with leaf temperature. Leaf isoprene emissions, a primary product of photosynthesis and strongly linked to plant high temperature stress tolerance, showed strong linear correlations with ETR (ƿ = 0.98) and qL (ƿ = 0.99). Furthermore, inhibition of isoprenoid biosynthesis repressed Pn at high temperatures through a mechanism that was independent of stomatal closure. The attached zip file contains separate folders main for fluorescence experiment data and inhibitor experiment data. The fluorescence experiment data is further organized with separate folders for gas exchange data and isoprene data. The inhibitor data contains also two folders, one for data from the experiment when performed using the inhibitor and the other with data from the experiment with water. All data files are available in both CSV and Excel file format. Data is used in the publication, "Stimulation of isoprene emissions and electron transport rates as a key mechanism of thermal tolerance in the tropical species Vismia guianensis." See the below Dataset References field for the full citation. This dataset was originally published on the NGEE Tropics Archive and is being mirrored on ESS-DIVE for long-term archival Acknowledgement: This material is based upon work supported as part of the Next Generation Ecosystem Experiments-Tropics (NGEE-Tropics) funded by the U.S. Department of Energy, Office of Science, Office of Biological and Environmental Research through contract No. DE-AC02-05CH11231 to Lawrence Berkeley National Laboratory, DE-AC05-00OR22725 to Oak Ridge National Laboratory, and DE-SC0012704 to Brookhaven National Laboratory, as part of DOE's Terrestrial Ecosystem Science Program. Additional funding for this research was provided by the Brazilian Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq). Logistical and scientific support is acknowledged by the Forest Management laboratory (LMF), Climate and Environment (CLIAMB), and Large Scale Biosphere-Atmosphere (LBA) programs at the National Institute for Amazon Research (INPA).

本数据包收录的数据展示了亚马逊中部地区早期演替物种圭亚那弧脉蕨（Vismia guianensis）的气孔导度（stomatal conductance, gs）与叶温之间的负相关关系，同时净光合速率（net photosynthesis, Pn）的最适温度为32.6 ± 0.4°C。与净光合速率不同，光合电子传递速率（photosynthetic electron transport rates, ETR）与QA氧化态（QA oxidation state, qL）随叶温呈线性升高。叶片异戊二烯排放作为光合作用的初级产物，与植物高温胁迫耐受性紧密相关，其与ETR（相关系数ρ=0.98）和qL（相关系数ρ=0.99）均呈现极强的线性相关性。进一步研究发现，异戊二烯类生物合成的抑制会通过不依赖于气孔关闭的机制，在高温下降低净光合速率。附带的压缩包包含两个独立文件夹，分别对应荧光实验数据与抑制剂实验数据。其中荧光实验数据进一步划分为气体交换数据与异戊二烯数据两个子文件夹；抑制剂实验数据同样包含两个子文件夹，分别为抑制剂处理组实验数据与纯水对照组实验数据。所有数据文件均提供CSV与Excel两种格式。本数据集所用数据已发表于论文《Stimulation of isoprene emissions and electron transport rates as a key mechanism of thermal tolerance in the tropical species Vismia guianensis》，完整引用信息详见下方“数据集参考文献”字段。本数据集最初发布于NGEE Tropics档案库，现由ESS-DIVE镜像存档以实现长期留存。致谢：本研究依托美国能源部（DOE）陆地生态系统科学计划，作为下一代热带生态系统实验（Next Generation Ecosystem Experiments-Tropics, NGEE-Tropics）项目开展，相关资助由美国能源部科学局生物与环境研究办公室通过合同DE-AC02-05CH11231授予劳伦斯伯克利国家实验室、DE-AC05-00OR22725授予橡树岭国家实验室，以及DE-SC0012704授予布鲁克海文国家实验室提供。本研究额外获得巴西国家科学技术发展委员会（Conselho Nacional de Desenvolvimento Científico e Tecnológico, CNPq）的经费支持。本研究的后勤与科学支持由亚马逊国家研究所（INPA）下属的森林管理实验室（LMF）、气候与环境项目（CLIAMB）以及大规模生物圈-大气相互作用项目（Large Scale Biosphere-Atmosphere, LBA）提供。