Demonstration of a Strict Molecular Oxygen Requirement of Yellow Latex Oxidation in the Central Amazon Canopy Tree Muiratinga (Maquira sclerophylla (Ducke) C.C. Berg)

R. de O. Piva, Luani; J. Jardine, Kolby; O. Cobello, Leticia; O. Gimenez, Bruno; M. Durgante, Flavia; Higuchi, Niro; Q. Chambers, Jeffrey

doi:10.21577/1984-6835.20180090

Title: Demonstration of a Strict Molecular Oxygen Requirement of Yellow Latex Oxidation in the Central Amazon Canopy Tree Muiratinga (Maquira sclerophylla (Ducke) C.C. Berg)

Abstract

Plant-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 Muiratinga (Maquira sclerophylla (Ducke) C.C. Berg) is rapidly and extensively oxidized to a black resin in the presence of air within 15-30 min. In a nitrogen atmosphere, latex oxidation was inhibited, but was immediately activated upon exposure to air. The results suggest the occurrence of O₂-dependent oxidative enzymes including polyphenol oxidase (PPO) within the latex of Muiratinga and supports previous findings of a key role of oxidation during latex coagulation.

Authors:

R. de O. Piva, Luani ^[1]; J. Jardine, Kolby ^[2]; O. Cobello, Leticia ^[3]; O. Gimenez, Bruno ^[3]; M. Durgante, Flavia ^[3]; Higuchi, Niro ^[3]; Q. Chambers, Jeffrey ^[4]

National Inst. for Amazon Research, Manaus-AM (Brazil); Federal Univ. of Paraná, Curitiba-PR (Brazil). Forest Sciences Dept.
National Inst. for Amazon Research, Manaus-AM (Brazil); Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States). Climate Science Dept., Earth Science Division
National Inst. for Amazon Research, Manaus-AM (Brazil)
National Inst. for Amazon Research, Manaus-AM (Brazil); Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States). Climate Science Dept., Earth Science Division; Univ. of California, Berkeley, CA (United States). Dept. of Geography

Publication Date:: Tue Sep 25 00:00:00 EDT 2018

Research Org.:: Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States)

Sponsoring Org.:: USDOE Office of Science (SC), Biological and Environmental Research (BER)

OSTI Identifier:: 1567103

Grant/Contract Number:: AC02-05CH11231

Resource Type:: Accepted Manuscript

Journal Name:: Revista Virtual de Quimica

Additional Journal Information:: Journal Volume: 10; Journal Issue: 5; Journal ID: ISSN 1984-6835

Country of Publication:: United States

Language:: English

Subject:: 59 BASIC BIOLOGICAL SCIENCES; secondary metabolism; latex oxidation; plant physiology; plant-insect interactions

Citation Formats


                    R. de O. Piva, Luani, J. Jardine, Kolby, O. Cobello, Leticia, O. Gimenez, Bruno, M. Durgante, Flavia, Higuchi, Niro, and Q. Chambers, Jeffrey. Demonstration of a Strict Molecular Oxygen Requirement of Yellow Latex Oxidation in the Central Amazon Canopy Tree Muiratinga (Maquira sclerophylla (Ducke) C.C. Berg).  United States: N. p., 2018. 
Web.  doi:10.21577/1984-6835.20180090.

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                    R. de O. Piva, Luani, J. Jardine, Kolby, O. Cobello, Leticia, O. Gimenez, Bruno, M. Durgante, Flavia, Higuchi, Niro, & Q. Chambers, Jeffrey. Demonstration of a Strict Molecular Oxygen Requirement of Yellow Latex Oxidation in the Central Amazon Canopy Tree Muiratinga (Maquira sclerophylla (Ducke) C.C. Berg).  United States.  https://doi.org/10.21577/1984-6835.20180090

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                    R. de O. Piva, Luani, J. Jardine, Kolby, O. Cobello, Leticia, O. Gimenez, Bruno, M. Durgante, Flavia, Higuchi, Niro, and Q. Chambers, Jeffrey. Tue .  
"Demonstration of a Strict Molecular Oxygen Requirement of Yellow Latex Oxidation in the Central Amazon Canopy Tree Muiratinga (Maquira sclerophylla (Ducke) C.C. Berg)".  United States.  https://doi.org/10.21577/1984-6835.20180090.  https://www.osti.gov/servlets/purl/1567103.

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@article{osti_1567103,

  title        = {Demonstration of a Strict Molecular Oxygen Requirement of Yellow Latex Oxidation in the Central Amazon Canopy Tree Muiratinga (Maquira sclerophylla (Ducke) C.C. Berg)},

  author       = {R. de O. Piva, Luani and J. Jardine, Kolby and O. Cobello, Leticia and O. Gimenez, Bruno and M. Durgante, Flavia and Higuchi, Niro and Q. Chambers, Jeffrey},

  abstractNote = {Plant-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 Muiratinga (Maquira sclerophylla (Ducke) C.C. Berg) is rapidly and extensively oxidized to a black resin in the presence of air within 15-30 min. In a nitrogen atmosphere, latex oxidation was inhibited, but was immediately activated upon exposure to air. The results suggest the occurrence of O2-dependent oxidative enzymes including polyphenol oxidase (PPO) within the latex of Muiratinga and supports previous findings of a key role of oxidation during latex coagulation.},

  doi          = {10.21577/1984-6835.20180090},

  journal      = {Revista Virtual de Quimica},

  number       = 5,

  volume       = 10,

  place        = {United States},

  year         = {Tue Sep 25 00:00:00 EDT 2018},

  month        = {Tue Sep 25 00:00:00 EDT 2018}

}

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https://doi.org/10.21577/1984-6835.20180090

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Figures / Tables:

Figure 1: Chemical structure of latex (cis-1,4 polyisoprene)

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