Home | My Profile | Contact Us
Research Trends Products  |   order gateway  |   author gateway  |   editor gateway  
ID:
Password:
Register | Forgot Password

Author Resources
 Author Gateway
 Article submission guidelines

Editor Resources
 Editor/Referee Gateway

Agents/Distributors
 Regional Subscription Agents/Distributors
 
Current Topics in Phytochemistry   Volumes    Volume 17 
Abstract
Oxidative/nitrosative stress evaluation in Fragilaria sp. cultures (Antarctic Diatom) exposed to moderate iron supplementation
Elizabeth Robello, Andrea Galatro, Susana Puntarulo
Pages: 93 - 106
Number of pages: 14
Current Topics in Phytochemistry
Volume 17 

Copyright © 2021 Research Trends. All rights reserved

ABSTRACT
 
The hypothesis tested here was that Fe supplementation at the early stage of development in the Antarctic microalgae Fragilaria sp. lead to changes in the oxidative redox balance at the hydrophilic and lipophilic cellular environment to allow for adequate development and for improving growth. Fe supplementation effect on the Antarctic diatoms was evaluated by the ascorbyl (A·)/ascorbate (AH-) and lipid radical (LR·)/alpha tocopherol (α-T) content ratios, the activity of antioxidant enzymes and the nitrosative metabolism during the microalgae growth stages. In the latent (LAG) phase in the presence of 50 µM Fe, the redox balance in the hydrophilic and in the lipophilic medium showed a significant reduction, as compared to values obtained in control cultures. The cells in LAG phase added with Fe showed a significant reduction in the superoxide dismutase (SOD) activity (36%) and the catalase (CAT) content (72%), and produced a significant reduction in nitric oxide (NO) generation rate, as compared to control cells. Thus, the increase in Fe content, as those seen in the natural habitat, would not be harmful for these diatoms since the microalgae control mechanisms in the early stages avoided drastic increase in the labile Fe pool (LIP).
Buy this Article


 
search


E-Commerce
Buy this article
Buy this volume
Subscribe to this title
Shopping Cart

Quick Links
Login
Search Products
Browse in Alphabetical Order : Journals
Series/Books
Browse by Subject Classification : Journals
Series/Books

Miscellaneous
Ordering Information Ordering Information
Downloadable forms Downloadable Forms