کنفرانس ملی مهندسی و مدیریت محیط زیست

صفحه اصلی / هفتمین کنفرانس ملی مهندسی و مدیریت محیط زیست

Antioxidant Defense and ROS Detoxification Enable Phenanthrene Tolerance in Nostoc calcicole ISC 89

نویسندگان :

Mahbobe Ghanbarzade¹ Mohammad Alavi² Naser Pourabbasali³

1- جهاد دانشگاهی مازندران 2- جهاد دانشگاهی مازندران 3- جهاد دانشگاهی مازندران

کلمات کلیدی :

Phenanthrene،Nostoc calcicola،Antioxidant defense system،ROS detoxification

چکیده :

The accumulation of polycyclic aromatic hydrocarbons (PAHs) can adversely affect the environment and human health. Microalgae can remove and degrade PAHs. This study investigated microalgae responses to phenanthrene (PHE)-a representative PAH-focusing on antioxidant defense mechanisms associated with reactive oxygen species (ROS) detoxification and scavenging. This study examined biochemical responses, including soluble proteins and sugars, total lipids, enzymatic antioxidants, and malondialdehyde (MDA), in Nostoc calcicola ISC 89, a phenanthrene-tolerant strain. The results showed that tolerance of N. calcicola ISC 89 to PHE was associated with increased antioxidant enzyme activities, total lipid content, proline levels, and soluble sugars. The result showed that MDA and H₂O₂ contents decreased, while specific growth rate and dry weight increased in the tolerant species. This study provides new insights into the mechanisms underlying N. calcicola ISC 89 tolerance to PHE-induced oxidative stress. Overall, these findings indicate that N. calcicola ISC 89 mitigates PHE-induced oxidative damage by enhancing antioxidant defenses and ROS detoxification, thereby supporting growth and biomass accumulation under PAH stress.