scholarly journals Evaluation of high salinity adaptation for lipid bio-accumulation in the green microalga Chlorella vulgaris

2021 ◽  
Author(s):  
Adel W. Almutairi ◽  
Abo El-Khair B. El-Sayed ◽  
Reda M. Marwa
Keyword(s):  
Chlorella Vulgaris ◽  
High Salinity ◽  
Salinity Adaptation ◽  
Green Microalga

Interactive effects of salinity on metabolic rate, activity, growth and osmoregulation in the euryhaline milkfish (Chanos chanos)

1998 ◽  
Vol 201 (24) ◽  
pp. 3355-3366
Author(s):  
C Swanson
Keyword(s):  
Metabolic Rate ◽  
High Salinity ◽  
Swimming Performance ◽  
Interactive Effects ◽  
Routine Activity ◽  
Swimming Velocity ◽  
Activity Levels ◽  
Salinity Adaptation ◽  
Chanos Chanos ◽  
Wide Range

The euryhaline milkfish (Chanos chanos) is an excellent subject for studies of the physiological and behavioral processes involved in salinity adaptation. In this study, energy partitioning for metabolism, activity and growth, maximal activity performance and blood osmotic concentrations were assessed at two activity levels in juvenile milkfish fed equal rations and maintained at a relatively constant temperature (262 C) and at salinities(15, 35 and 55 ?) that represented a wide range of osmoregulatory challenges. Changes in the measured parameters were not consistently related to the magnitude of the trans-integumentary osmotic gradients. Routine oxygen consumption rates were high in 35 ? salinity (mean 1 s.e.m. 1678 mg O2 kg-1 h-1) and comparably low in 15 and 55 ? salinity (1336 and 1273 mg O2 kg-1 h-1, respectively). Routine activity levels (relative swimming velocity) were highest in 35 ? salinity (0. 960.04 L s-1), where L is standard length, intermediate in 15 ? salinity (0.770.03 L s-1) and lowest in 55 ? salinity (0.670.03 L s-1). Growth was significantly higher in 55 ? salinity (3.40.2 % increase in wet body mass per day) than in 35 ?salinity (2.40.2 % increase per day) and intermediate in 15 ? salinity(2.90.5 % increase per day). Maximum swimming velocities decreased with increases in salinity, from 9.90.7 L s-1 in 15 ? salinity to 6.60. 5 L s-1 in 55 ? salinity. Sustained swimming activity above routine levels for 2 h resulted in an increase in blood osmotic concentrations in milkfish in 55 ?salinity, but osmoregulation was re-established during the second 2 h of activity. Thus, patterns of variation in metabolic rate and growth were largely parallel to variations in routine activity although, comparing 15 and 55 ? salinity, elevated maintenance costs for osmoregulation at the high salinity were detectable. Reduced osmoregulatory abilities and reductions in maximal swimming performance suggest that high salinity may constrain activity. The results demonstrate that investigations of salinity adaptation in euryhaline fishes should take into account the interactive effects of salinity on physiology and behavior.

Magnesium Uptake by the Green Microalga Chlorella vulgaris in Batch Cultures

2016 ◽  
Vol 26 (3) ◽  
pp. 503-510 ◽  
Author(s):  
Hela Ben Amor-Ben Ayed ◽  
Behnam Taidi ◽  
Habib Ayadi ◽  
Dominique Pareau ◽  
Moncef Stambouli
Keyword(s):  
Chlorella Vulgaris ◽  
Batch Cultures ◽  
Magnesium Uptake ◽  
Green Microalga

Enhancement of biodiesel yield from a halophilic green microalga isolated under extreme hypersaline conditions through stepwise salinity adaptation strategy

2020 ◽  
Vol 310 ◽  
pp. 123462 ◽  
Author(s):  
Abd El-Fatah Abomohra ◽  
Amal H. El-Naggar ◽  
Saleh O. Alaswad ◽  
Mahdy Elsayed ◽  
Mei Li ◽  
...  
Keyword(s):  
Adaptation Strategy ◽  
Salinity Adaptation ◽  
Green Microalga

Oral Administration of an Enzymatic Protein Hydrolysate from the Green Microalga Chlorella vulgaris Enhances the Nutritional Recovery of Malnourished Mice

2011 ◽  
Vol 14 (12) ◽  
pp. 1583-1589 ◽  
Author(s):  
Humberto J. Morris ◽  
Olimpia V. Carrillo ◽  
María E. Alonso ◽  
Rosa C. Bermúdez ◽  
Ángel Almarales ◽  
...  
Keyword(s):  
Oral Administration ◽  
Chlorella Vulgaris ◽  
Protein Hydrolysate ◽  
Nutritional Recovery ◽  
Green Microalga

Comparative Analysis of lonoregulation in Rainbow Trout (Salmo gairdneri) of Different Sizes Following Rapid and Slow Salinity Adaptation

1985 ◽  
Vol 42 (12) ◽  
pp. 1994-2003 ◽  
Author(s):  
C. E. Johnston ◽  
J. C. Cheverie
Keyword(s):  
Rainbow Trout ◽  
Comparative Analysis ◽  
Atpase Activity ◽  
Prince Edward Island ◽  
High Salinity ◽  
High Plasma ◽  
Estuarine Environment ◽  
Salmo Gairdneri ◽  
Direct Transfer ◽  
Salinity Adaptation

Plasma ionic values and gill (Na+,K+)-ATPase activity were compared for rainbow trout (Salmo gairdneri) of three different fork lengths (< 11, 11–15, and > 15 cm) following transference (1) from freshwater directly into seawater of 28–29‰ (DTT), (2) from freshwater directly into an estuarine environment at Fortune Bay where salinity fluctuated primarily between 17 and 29‰ (DTF), (3) from freshwater into a salinity that slowly increased to 28‰ in 22 d (SAT), and (4) from freshwater into freshwater (FC). Trout of all sizes displayed better growth, lower mortality, and better ionoregulatory capacity as judged by plasma Na+, K+, and Cl− concentrations and (Na+,K+)-ATPase activity in sea cages in Fortune Bay (DTF). The poorest ionoregulatory capacity and growth was in the direct transfer from freshwater to salinity of 28–29‰ (DTT). Failure of small trout to adapt to constantly high salinity of 28–29‰ was due to a slower development of (Na+,K+)-ATPase activity, excessively high plasma Na+ and Cl− concentrations, hemoconcentration, and tissue dehydration. Except for trout severely stressed by high salinity, growth in seawater was more favorable than in freshwater. Prince Edward Island estuaries are very favorable as adaptation and rearing areas for small and large rainbow trout.

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