EFFECT OF ENVIRONMENTAL CONDITIONS ON FATTY ACID COMPOSITION OF THE RED ALGA PORPHYRIDIUM CRUENTUM: CORRELATION TO GROWTH RATE1

Cohen, Zvi; Vonshak, Avigad; Richmond, Amos

doi:10.1111/j.1529-8817.1988.tb04474.x

Cited by 158 publications

(159 citation statements)

References 30 publications

(23 reference statements)

Supporting

Mentioning

148

Contrasting

Unclassified

Order By: Relevance

“…2). This also supports the argument that chlorophyll molecules are associated with PUFA (Kates and Volcani, 1966;Cohen et al, 1988;Thompson et al, 1990). We suggest that diatoms use pairs of 20:5 to accommodate the phytol side chain of chl a.…”

Section: Discussionsupporting

confidence: 73%

Photosynthetic energy conversion under extreme conditions—II: the significance of lipids under light limited growth in Antarctic sea ice diatoms

2002

View full text Add to dashboard Cite

Low photosynthetic active radiation is a strong determinant in the development and growth of sea ice algae. The algae appear to have universal mechanisms to overcome light limitation. One important process, which is induced under light limitation, is the desaturation of chloroplast membrane lipids. In order to discover whether this process is universally valid in sea ice diatoms, we investigated three species coexisting in chemostats illuminated with 15 and 2 mmol photons m À2 s À1 at À1 C. Growth under 2 mmol photons m À2 s À1 caused a 50% increase in monogalactosyldiacylglycerols (MGDG) thylakoid membrane related 20:5 n-3 fatty acids. This fatty acid supports the fluidity of the thylakoid membrane and therefore the velocity of electron flow, which is indicated by increasing rate constants for the electron transport between Q A (first stable electron acceptor) and bound Q B (second stable electron acceptor) (11.16 AE 1.34 to 23.24 AE 1.35 relative units). Two mmol photons m À2 s À1 furthermore resulted in higher amounts of non-lipid bilayer forming MGDG in relation to other bilayer forming lipids, especially digalactosydiacylglycerol (DGDG). The ratio of MGDG:DGDG increased from 3.4 AE0.3 to 5.7 AE0.3. The existence of bilayer thylakoid membranes with high proportions of non. bilayer forming lipids is only possible when sufficient thylakoid pigment-protein complexes are present. If more thylakoid pigment-protein complexes are present in membranes, as found under extreme light limitation, less bilayer forming lipids such as DGDG are required to stabilize the bilayer structure. Differences in protein contents between both light intensities were not found. Consequently pigment contents which nearly doubled under 2 mmol photons m À2 s À1 must be responsible in balancing the potential stability loss resulting from an increase in MGDG:DGDG ratio. #

show abstract

Section: Discussionsupporting

confidence: 73%

Photosynthetic energy conversion under extreme conditions—II: the significance of lipids under light limited growth in Antarctic sea ice diatoms

2002

View full text Add to dashboard Cite

show abstract

“…which are promising species as a lipid production from microalgae. Noteworthy that chlorophyll play an essential role for capturing CO 2 and solar energy to generate the metabolic flux for not only cell growth but also lipid accumulation of microalgae photosynthesis (Cohen et al, 1988;Li et al, 2008). Therefore, to get better understanding of the relationship between cell growth and lipid accumulation, the measurement chlorophyll a (Chl a) of cell during the cultivation process is important to be done.…”

Section: Introductionmentioning

confidence: 99%

Effect of Temperature and Nutrient Limitation on the Growth and Lipid Content of Three Selected Microalgae (Dunaliella tertiolecta, Nannochloropsis sp. and Scenedesmus sp.) for Biodiesel Production

Rukminasari¹

2013

ijms

View full text Add to dashboard Cite

Microalgae is one of potential source for biodiesel due to high efficiency of solar energy conversion to chemical energy.Several microalgae also have high lipid content per dry weight of biomass. The aims of the present work to study the effects of temperature and nutrient depletion on the growth and lipid content of three selected microalgae (Dunaliella tertiolecta, Nannochloropsis sp and Scenedesmus sp) in view of their possible utilization as raw materials for biodiesel production. In addition, various lipid analysis methods were applied, such as gravimetric, Nile Red staining and FTIR spectroscopy. Algal growth and lipid content was strongly influenced by the variation of tested parameters; indeed, an increase or decrease temperature from ambient temperature and nutrient depletion practically increase in lipid content. Nile Red staining and FTIR spectroscopy are effective tool to analyze rapidly of lipid content from selected microalgae.

show abstract

“…Fatty acid content was determined as fatty acid methyl esters (FAME), according to the Lepage and Roy (1986), modified by Cohen et al (1988). In brief, analysis were performed in a gas chromatograph (Agilent HP 6890) equipped with a flame ionisation detector and a mass selective detector (Agilent 5973).…”

Section: Chemical Analysismentioning

confidence: 99%

Untitled

Nogueira¹,

Cordeiro²,

Andrade³

et al. 2012

Turk. J. Fish. Aquat. Sci.

View full text Add to dashboard Cite

Rendered animal protein ingredients, such as feather meal and blood meal, are promising animal protein sources for the replacement of fish meal often proved to combine synergistically. Three practical diets containing similar amounts of PD/ED (22.0 mg/kJ) but differing in the amount of digestible protein were tested in sea bream juveniles of initial body weight 41.81±1.12 g. FBCM diet (40%PD) and FBM diet (42%PD) contained similar percentages of blood and feather meal (10% and 5%, respectively) but differed in the proportion of soybean / rapeseed meal. Although growth performance and feed utilization were very similar in all treatments, chemical composition showed that blood and feather meal supplementation increased significantly whole-body lipid content compared with fishmeal diet (P205A). Liver lipid content was significantly lower in fish fed FBCM diet. Whole-body fatty acids composition was similar between treatments, ranging between 242.57±14.17 mg g -1 in FBM diet and 274.62±23.95 mg g -1 for FBCM diet. Palmitic acid, oleic acid, linoleic acid; EPA and DHA were the most abundant fatty acids in both polar and neutral lipid fractions of the fish. Economical evaluation indicated that the incorporation of blood and feather meal as a substitute of fish meal decreased feed costs leading to a better economic conversion ratio

show abstract

EFFECT OF ENVIRONMENTAL CONDITIONS ON FATTY ACID COMPOSITION OF THE RED ALGA PORPHYRIDIUM CRUENTUM: CORRELATION TO GROWTH RATE¹

Cited by 158 publications

References 30 publications

Photosynthetic energy conversion under extreme conditions—II: the significance of lipids under light limited growth in Antarctic sea ice diatoms

Photosynthetic energy conversion under extreme conditions—II: the significance of lipids under light limited growth in Antarctic sea ice diatoms

Effect of Temperature and Nutrient Limitation on the Growth and Lipid Content of Three Selected Microalgae (<i>Dunaliella tertiolecta</i>, <i>Nannochloropsis</i> sp. and <i>Scenedesmus</i> sp.) for Biodiesel Production

Untitled

Contact Info

Product

Resources

About