Copper stress induces antioxidant responses and accumulation of sugars and phytochelatins in Antarctic Colobanthus quitensis (Kunth) Bartl.

Biological research: BR

Marisol Pizarro¹  Rodrigo A. Contreras²  Hans Khler³ 

[1] Centro para el Desarrollo de la Nanociencia y la Nanotecnologa (CEDENNA), Universidad de Santiago de Chile, Santiago, Chile;Laboratorio de Fisiologa y Biotecnologa Vegetal, Departamento de Biologa, Facultad de Qumica y Biologa, Universidad de Santiago de Chile, Santiago, Chile;Laboratory of Aquatic Environmental Research (LACER), Center of Advanced Studies, Universidad de Playa Ancha, Via del Mar, Chile

关键词: C. quitensis;    Metal;    Antioxidants;    Phytochelatins;    Sugars;    Antarctica;   

DOI  :  10.1186/s40659-018-0197-0

学科分类：生物科学（综合）

来源: BioMed Central

【 摘 要 】

In field, C. quitensis is subjected to many abiotic extreme environmental conditions, such as low temperatures, high UV-B, salinity and reduced water potentials, but not metal or metalloid high concentrations in soil, however, other members of Caryophyllaceae family have tolerance to high concentrations of metals, this is the case of Silene genre. In this work, we hypothesize that C. quitensis have the same mechanisms of Silene to tolerate metals, involving accumulation and induction of antioxidant systems, sugar accumulation and the induction of thiols such as phytochelatins to tolerate. The results showing an effective antioxidant defensive machinery involving non-enzymatic antioxidants such as phenolics, GSH and ascorbic acid, in another hand, GSH-related oligomers (phytochelatins) and sugars was induced as a defensive mechanism. Colobanthus quitensis exhibits certain mechanisms to tolerate copper in vitro demonstrating its plasticity to tolerate several abiotic stress conditions.

【 授权许可】

CC BY