@Article{JardineJSCCGSDHMGGMZPC:2016:HyCeAm,
               author = "Jardine, Kolby J. and Jardine, Angela B. and Souza, Vinicius F. 
                         and Carneiro, Vilany and Ceron, Joao V. and Gimenez, Bruno O. and 
                         Soares, Cilene P. and Durgante, Flavia M. and Higuchi, Niro and 
                         Manzi, Antonio Ocimar and Gon{\c{c}}alves, Jos{\'e} F. C. and 
                         Garcia, Sabrina and Martin, Scot T. and Zorzanelli, Raquel F. and 
                         Piva, Luani R. and Chambers, Jeff Q.",
          affiliation = "{Lawrence Berkeley National Laboratory} and {Instituto Nacional de 
                         Pesquisas da Amaz{\^o}nia (INPA)} and {Instituto Nacional de 
                         Pesquisas da Amaz{\^o}nia (INPA)} and {Instituto Nacional de 
                         Pesquisas da Amaz{\^o}nia (INPA)} and {Instituto Nacional de 
                         Pesquisas da Amaz{\^o}nia (INPA)} and {Instituto Nacional de 
                         Pesquisas da Amaz{\^o}nia (INPA)} and {Instituto Nacional de 
                         Pesquisas da Amaz{\^o}nia (INPA)} and {Instituto Nacional de 
                         Pesquisas da Amaz{\^o}nia (INPA)} and {Instituto Nacional de 
                         Pesquisas da Amaz{\^o}nia (INPA)} and {Instituto Nacional de 
                         Pesquisas Espaciais (INPE)} and {Instituto Nacional de Pesquisas 
                         da Amaz{\^o}nia (INPA)} and {Instituto Nacional de Pesquisas da 
                         Amaz{\^o}nia (INPA)} and {Harvard University} and {Instituto 
                         Nacional de Pesquisas da Amaz{\^o}nia (INPA)} and {Instituto 
                         Nacional de Pesquisas da Amaz{\^o}nia (INPA)} and {Lawrence 
                         Berkeley National Laboratory}",
                title = "Methanol and isoprene emissions from the fast growing tropical 
                         pioneer species <i>Vismia guianensis</i> (Aubl.) Pers. 
                         (Hypericaceae) in the central Amazon forest",
              journal = "Atmospheric Chemistry and Physics",
                 year = "2016",
               volume = "16",
               number = "10",
                pages = "6441--6452",
             abstract = "Isoprene (Is) emissions by plants represent a loss of carbon and 
                         energy resources leading to the initial hypothesis that fast 
                         growing pioneer species in secondary tropical forests allocate 
                         carbon primarily to growth at the expense of isoprenoid defenses. 
                         In this study, we quantified leaf isoprene and methanol emissions 
                         from the abundant pantropical pioneer tree species Vismia 
                         guianensis and ambient isoprene concentrations above a diverse 
                         secondary forest in the central Amazon. As photosynthetically 
                         active radiation (PAR) was varied (0 to 3000 µmol m\−2 s 
                         \−1 ) under standard leaf temperature (30 \◦C), 
                         isoprene emissions from V. guianensis increased without saturation 
                         up to 80 nmol m\−2 s \−1 . A nonlinear increase in 
                         isoprene emissions with respect to net photosynthesis (Pn) 
                         resulted in the fraction of Pn dedicated to isoprene emissions 
                         increasing with light intensity (up to 2 % of Pn). Emission 
                         responses to temperature under standard light conditions (PAR of 
                         1000 µmol m\−2 s \−1 ) resulted in the classic 
                         uncoupling of isoprene emissions (Topt,iso > 40 \◦C) from 
                         net photosynthesis (Topt,Pn = 30.032.5 \◦C) with up to 7 % 
                         of Pn emitted as isoprene at 40 \◦C. Under standard 
                         environmental conditions of PAR and leaf temperature, young V. 
                         guianensis leaves showed high methanol emissions, low Pn, and low 
                         isoprene emissions. In contrast, mature leaves showed high Pn, 
                         high isoprene emissions, and low methanol emissions, highlighting 
                         the differential control of leaf phenology over methanol and 
                         isoprene emissions. High daytime ambient isoprene concentrations 
                         (11 ppbv) were observed above a secondary Amazon rainforest, 
                         suggesting that isoprene emissions are common among neotropical 
                         pioneer species. The results are not consistent with the initial 
                         hypothesis and support a functional role of methanol during leaf 
                         expansion and the establishment of photosynthetic machinery and a 
                         protective role of isoprene for photosynthesis during high 
                         temperature extremes regularly experienced in secondary rainforest 
                         ecosystems.",
                  doi = "10.5194/acp-16-6441-2016",
                  url = "http://dx.doi.org/10.5194/acp-16-6441-2016",
                 issn = "1680-7316 and 1680-7324",
                label = "lattes: 0575383574431005 10 JardineJSCCGSDHMGGMZPC:2016:HyCeAm",
             language = "en",
           targetfile = "jardine_methanol.pdf",
        urlaccessdate = "27 abr. 2024"
}