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Highly reactive light-dependent monoterpenes in the Amazon
Jardine, Angela B.; Jardine, Kolby J.; Fuentes, José D.; Martin, Scot T.; Martins, Giordane Augusto; Durgante, Flávia MachadoDespite orders of magnitude difference in atmospheric reactivity and great diversity in biological functioning, little is known about monoterpene speciation in tropical forests. Here we report vertically resolved ambient air mixing ratios for 12 monoterpenes in a central Amazon rainforest including observations of the highly reactive cis-β-ocimene (160 ppt), trans-β-ocimene (79 ppt), and terpinolene (32 ppt) wh...
Methanol and isoprene emissions from the fast growing tropical pioneer species ...
Jardine, Kolby J.; Jardine, Angela B.; Souza, Vinicius F.; Carneiro, Vilany Matilla Colares; Ceron, João Vitor Barbosa; Gimenez, Bruno OlivaIsoprene (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 con...
Tree climbing techniques and volume equations for Eschweilera (Matá-Matá), a hy...
Gimenez, Bruno Oliva; dos Santos, Leandro T.; Gebara, Jonas; Celes, Carlos Henrique Souza; Durgante, Flávia Machado; Lima, Adriano José NogueiraThe Eschweilera genus has great ecological and economic importance due to its wide abundance in the Amazon basin. One potential use for the Eschweilera genus is in forest management, where just a few trees are removed per hectare. In order to improve the forest management in the Amazon, this study assessed two critical issues: volume equations fitted for a single genus and the development of a non-destructive m...
Demonstration of a strict molecular oxygen requirement of yellow latex oxidatio...
Piva, Luani Rde Oliveira; Jardine, Kolby J.; Cobello, Leticia Oliveira; Gimenez, Bruno Oliva; Durgante, Flávia Machado; Higuchi, NiroPlant-derived latex is widely used in rubber production and plays important roles in ecological processes in the tropics. Although it is known that latex oxidation from the commercially important tree Hevea brasiliensis, results in latex browning, little is known about latex oxidation in highly diverse tropical ecosystems. Here we show that upon physical trunk damage, yellow latex released from the canopy tree ...
Volatile monoterpene ‘fingerprints’ of resinous Protium tree species in the Ama...
Piva, Luani Rde Oliveira; Jardine, Kolby J.; Gimenez, Bruno Oliva; Oliveira Perdiz, Ricardo de; Menezes, Valdiek S.; Durgante, Flávia MachadoVolatile terpenoid resins represent a diverse group of plant defense chemicals involved in defense against herbivory, abiotic stress, and communication. However, their composition in tropical forests remains poorly characterized. As a part of tree identification, the ‘smell’ of damaged trunks is widely used, but is highly subjective. Here, we analyzed trunk volatile monoterpene emissions from 15 species of the ...
Discriminação de espécies florestais com a utilizaçao da razão isotópica 13 C e...
Durgante, Flávia MachadoCombinar alta tecnologia e técnicas apropriadas para discriminar espécies florestais é necessário para aprimorar o sistema de inventário da biodiversidade em países tropicais. Este estudo foi realizado para verificar o desempenho da razão isotópica 13C e 1 5 N, os valores de concentração totais de N e C (%) e a espectroscopia no infravermelho próximo (NIRs) nas folhas como indicadores para discriminar 8 espécie...
Near infrared spectroscopy facilitates rapid identification of both young and m...
Lang, Carla; Costa, Flávia Regina Capellotto; Camargo, José Luís Campana; Durgante, Flávia Machado; Vicentini, AlbertoPrecise identification of plant species requires a high level of knowledge by taxonomists and presence of reproductive material. This represents a major limitation for those working with seedlings and juveniles, which differ morphologically from adults and do not bear reproductive structures. Near-infrared spectroscopy (FT-NIR) has previously been shown to be effective in species discrimination of adult plants,...