[Home ] [Archive]    
:: Main :: About :: Current Issue :: Archive :: Search :: Submit ::
Main Menu
Home::
Journal Information::
Articles archive::
Registration::
For Authors::
For Reviewers::
Contact us::
Site Facilities::
Webmail::
Publication Ethics::
::
Indexed & full text in

AWT IMAGE 

..
Journal's Impact Factor

 

             "If you have any questions or concerns, please contact us by email

 "ijfs.ifro(at)yahoo.com"
Journal`s Impact Factor 2023:0.985
SJR: Q3
Journal's Impact Factor ISC 2020: 0.476

 

..
Search in website

Advanced Search
..
Receive site information
Enter your Email in the following box to receive the site news and information.
..
Abstract in

 پایگاه استنادی علوم جهان اسلام (ISC)

پایگاه اطلاعات جهاد دانشگاهی (SID) 



بانک نشریات کشور (مگیران)


https://www.stomaeduj.com/wp-content/uploads/2019/12/publons.png





scholar.google

..

..
Journal DOI

AWT IMAGE
Journal DOI

10.18869/acadpub.ijfs
 

..
:: Volume 19, Issue 6 (2020) ::
IJFS 2020, 19 Back to browse issues page
Research Article: Effects of short-time alkaline pretreatment on growth and photosynthesis efficiency of endemic cyanobacterium Fischerella sp. FS 18.
B. Abbasi , Sh. Shokravi * , M. Ahmadi Golsefidi , A. Sateei , E. Kiyaei
Department of Biology, Gorgan Branch, Islamic Azad University, Gorgan, Iran. , shadmanshokravi@yahoo.com
Abstract:   (2419 Views)
Alkaline pH is one of the most important problems of our aquatic habitat. We used Stigonematalean native cyanobacterium Fischerella sp. FS 18 as our model strain, andstudied it under different alkaline pHs (7, 9 and rarely 11) under two different – short and long- time treatments (24 and 96 hours after inoculation). Spectroscopic results showed that both alkalinity and time affected growth rate, phycobilisome and chlorophyll production. Response surface plot analysis of distribution showed that the pH borders between 8.5 to  9 would be critical at 24 hours after inoculation reaching to the highest rates of phycobilisomes. Spectrofluorimetric analysis showed that the highest photosystem I/ photosystem II may be seen at 24 hours at pH9. Photosynthesis- Irradiance curves showed that the highest rate of maximum photosynthesis belonged to pH9 in the short time treatment (24 hours). Increasing the time (96 hours) decreased the maximum amount of oxygen liberation significantly. Moving from the optimum conditions (even slightly) caused a sharp decline in the amount of alpha. The slope of decline was steep until near neutral and longtime condition.  Decreasing the time, and at the same time increasing alkalinity (alkaline pH) caused higher activity of photosystems especially photosystem I which lead to higher reductant production and cyclic electron flow operation. Distinct borders of pH (8.5-9) at 24 hours caused considerably high growth and matter production. This was naturally true for phycocyanin, phycoerythrin and the other economically important matters.  
Keywords: Alkalinine pH, Cyanobacteria, Ecophysiology, Fischerella sp. FS 18, Time, Ultrastructure
Full-Text [PDF 489 kb]   (869 Downloads)    
Type of Study: Orginal research papers | Subject: Biology & physiology
Received: 2019/08/27 | Accepted: 2019/09/16 | Published: 2020/11/20
Send email to the article author

Add your comments about this article
Your username or Email:

CAPTCHA


XML     Print


Download citation:
BibTeX | RIS | EndNote | Medlars | ProCite | Reference Manager | RefWorks
Send citation to:

Abbasi B, Shokravi S, Ahmadi Golsefidi M, Sateei A, Kiyaei E. Research Article: Effects of short-time alkaline pretreatment on growth and photosynthesis efficiency of endemic cyanobacterium Fischerella sp. FS 18.. IJFS 2020; 19 (6) :2865-2876
URL: http://jifro.ir/article-1-4035-en.html


Rights and permissions
Creative Commons License This work is licensed under a Creative Commons Attribution-NonCommercial 4.0 International License.
Volume 19, Issue 6 (2020) Back to browse issues page
Iranian Journal of Fisheries Sciences Iranian Journal of Fisheries Sciences
Persian site map - English site map - Created in 0.07 seconds with 45 queries by YEKTAWEB 4645