Antioxidant Responses Induced by UVB Radiation in Desv

Overview

Journal Front Plant Sci

Date 2017 Jun 17

PMID 28620407

Citations 16

Authors

Hans Kohler

Rodrigo A Contreras

Marisol Pizarro

Rodrigo Cortes-Antiquera

Gustavo E Zuniga

Affiliations

Soon will be listed here.

Abstract

Desv. is one of two vascular plants that live in the Maritime Antarctic Territory and is exposed to high levels of ultraviolet-B (UVB) radiation. In this work, antioxidant physiology of was studied in response to UVB induced oxidative changes. Samples were collected from Antarctica and maintained culture during 2 years. Plants were sub-cultured in a hydroponic system and exposed to 21.4 kJ m day, emulating summer Antarctic conditions. Results showed rapid and significant increases in reactive oxygen species (ROS) at 3 h, which rapidly decreased. No dramatic changes were observed in photosynthetic efficiency, chlorophyll content, and level of thiobarbituric acid reactive species (MDA). The enzymatic (superoxide dismutase, SOD and total peroxidases, POD) and non-enzymatic antioxidant activity (total phenolic) increased significantly in response to UVB treatment. These findings suggest that tolerance of to UVB radiation could be attributed to its ability to activate both enzymatic and non-enzymatic antioxidant systems.

Citing Articles

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