Document Details

Document Type : Article In Journal 
Document Title :
Effect of Environmental Temperature Transition on Fatty Acid Composition of Membrane Glycerolipids in Marine Cyanobacterium Aphanizomenon sp.
تأثير تغير درجة الحرارة وسط النمو على تركيب جلايكوليبيدات الغشاء من الأحماض الدهنية في السيانوبكتيريا من نوع Aphanizomenon sp.
 
Subject : Effect of Environmental Temperature Transition on Fatty Acid Composition of Membrane Glycerolipids in Marine Cyanobacterium Aphanizomenon sp. 
Document Language : English 
Abstract : In this study the fatty acid composition and the degree of unsaturation were followed upon temperature shift from 28oC to15oC and from 15oCto 28oC. Temperature shift from 28oC to 15oC led to changes in the overall fatty acid composition in total lipid and glycerolipid classes, with rapid and slow responses in the fatty acid content during the adaptation period. The rapid response-limited to the 12h following temperature transitionobserved in PG fraction in which C18:1 increased, and almost 2.5 fold, while C16:0 and C18:3 level decreased, and a relatively rapid response was presented by decrease in C16:0 and concomitant increase in C18:3 in MGDG and DGDG. A comparison of fatty acid composition at 28oC (0h) with those at the end of the 15oC growth period (48) shows that the most significant changes were the increase of C18:3/C18:2 ratio in the total lipid, MGDG and SL. The results also show an increase in the degree of concentration in the total lipid, MGDG and SL fractions, while there is no change in DGDG and decrease in PG fraction. When the growth temperature shift from 15oC to 28oC, the pattern of the change in fatty acid composition and the degree of unsaturation were relatively opposite to that observed upon temperature shift from 28oC to 15oC. A decrease in C16:3 and a marked increase in C16:1 was observed in total lipid, MGDG, PG and SL. In the total lipid small decrease in C18:3 was found accompanied by a doubling increase in C18:1. The amount of C16:0 and C18:0 however remained constant during temperature adaptation. 
ISSN : 1658-5311 
Journal Name : Scientific Journal of King Faisal University 
Volume : 9 
Issue Number : 1 
Publishing Year : 1429 AH
2008 AD 
Article Type : Article 
Added Date : Wednesday, February 20, 2013 

Researchers

Researcher Name (Arabic)Researcher Name (English)Researcher TypeDr GradeEmail
خالد عمر ابو النجاabualnaja, khaled omerResearcherDoctoratekaabulnaja@kau.edu.sa

Files

File NameTypeDescription
 35056.pdf pdf 

Back To Researches Page