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Methylglyoxal metabolism in seaweeds during desiccation

Autores

CORRESPONSAL

Loretto Contreras-Porcia

lorettocontreras@unab.cl

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1

Departamento de Ecología y Biodiversidad, Facultad de Ecología y Recursos Naturales, Universidad Andres Bello, República 440, Santiago, Chile

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5

Center of Applied Ecology & Sustainability (CAPES), Pontificia Universidad Católica de Chile, Avda. Libertador Bernardo O´Higgins 340, Santiago, Chile

Camila Fierro

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1

Departamento de Ecología y Biodiversidad, Facultad de Ecología y Recursos Naturales, Universidad Andres Bello, República 440, Santiago, Chile

Camilo López-Cristoffanini

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2

Departamento de Biología Vegetal, Facultad de Biología, Universitat de Barcelona, 08028 Barcelona, España

Nicolás Latorre

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1

Departamento de Ecología y Biodiversidad, Facultad de Ecología y Recursos Naturales, Universidad Andres Bello, República 440, Santiago, Chile

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3

Programa de Doctorado en Medicina de la Conservación, Facultad de Ecología y Recursos Naturales, Universidad Andres Bello, República 440, Santiago, Chile

Jorge Rivas

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4

Instituto de Ciencias Químicas Aplicadas, Facultad de Ingeniería, Universidad Autónoma de Chile, Llano Subercaseaux 2801, San Miguel, Chile

Resumen

In primary producers, diverse stressors cause an over-production of methylglyoxal (MG), which is principally detoxified by glyoxalase I (GLO1) activity. A recent proteomic study found that GLO1 was up-regulated during natural desiccation in the red seaweed Pyropia orbicularis, which inhabits the upper intertidal rocky zone and compared to other species, is highly tolerant to air exposure. To better understand and determine differential responses to desiccation stress, this study evaluated MG concentration and GLO1 activity in two species with contrasted vertical distribution, P. orbicularis and Lessonia spicata (lower distribution). Results showed that P. orbicularis successfully scavenges MG via increased GLO1 activity during desiccation. In contrast, GLO1 activity inL. spicata did not increase during desiccation, resulting in MG overproduction. This study is the first to quantify MG and GLO1 levels in seaweeds during natural stress, and partly explain the mechanisms by which P. orbicularis is dominant in the upper rocky intertidal zone.

Palabras clave

Methylglyoxal, glyoxylase I, PyropiaLessonia, desiccation

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