Marine algal zonation and substratum in Beer Bay, south-east Devon

The intertidal zonation of the dominant algal species in Beer Bay, south-east Devon, was examined in relation to substratum by means of plane-table maps and transects. The dominance of Ulva lactuca on colonies of the reef-building worms Sabellaria alveolata was noted, but the distributions of Fucus vesiculosus, F. serratus, Gigartina stellata and Enteromorpha spp. showed no correlation with substratum.

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Ultrasonically-Extracted Marine Polysaccharides as Potential Green Antioxidant Alternatives

Proceedings ◽

10.3390/asec2020-07606 ◽

2020 ◽

Vol 67 (1) ◽

pp. 23

Author(s):

Hanaa L. Essa ◽

Hania A. Guirguis ◽

Mayyada M. H. El-Sayed ◽

Dalia Rifaat ◽

Mohamed S. Abdelfattah

Keyword(s):

Antioxidant Activity ◽

Antioxidant Activities ◽

Algal Species ◽

Avicennia Marina ◽

Ulva Lactuca ◽

Biologically Active ◽

Sulfated Polysaccharides ◽

Total Phenolic ◽

Sugar Substitutes ◽

Pharmaceutical Industries

Marine-extracted sulfated polysaccharides (SPs) have been the subject of myriad research since they are considered an eco-friendly source of biologically active compounds. Meanwhile, food and pharmaceutical industries are urgently producing natural sugar substitutes and antioxidants as alternatives to synthetic ones which are associated with cytotoxicity and safety issues. This study assesses the potential of using marine SPs obtained via the ultrasonic-assisted extraction of different marine species, to utilize them as antioxidant sugar substitutes. The carbohydrate, total phenolic contents and antioxidant activities were measured for SP extracts of the algal species of Ulva lactuca, Jania rubens and the marine plant mangrove Avicennia marina. These SPs were structurally elucidated by Fourier Transform Infrared (FTIR) spectroscopic and high-performance liquid chromatography (HPLC) analyses. The results revealed that SPs’ highest yield percent was obtained from Ulva lactuca, 5.50 ± 0.25%. The SPs of Avicennia marina had the highest carbohydrate content, 44 ± 1% and antioxidant activity, 78.85 ± 0.06 at the 100 μg/mL concentration and 89.50 ± 0.21 at the 250 μg/mL concentration. Meanwhile, the highest phenolic content was exhibited by algal SPs obtained from Jania rubens, 132.60 ± 2.50 mgGa/g. Results also showed that all extracts have potent antioxidant activity, while the highest antioxidant activity belonged to the SPs of Avicennia marina owing possibly to their balanced glucose and galactose contents as measured by HPLC. This work emphasizes the need to consider sulfated polysaccharides from marine sources for their antioxidant activity and to correlate it with their monosaccharide content to determine the effect of reducing sugar concentration on the antioxidant activity.

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EXTRACTION, ISOLATION OF ACTIVE PRINCIPLES, ANTI-BACTERIAL AND WOUND HEALING ACTIVITY OF THE MARINE ALGAL SPECIES OEDOGONIUM GLOBOSUM AND OEDOGONIUM INTERMEDIUM

International Journal of Pharmacy and Pharmaceutical Sciences ◽

10.22159/ijpps.2021v13i5.40026 ◽

2021 ◽

pp. 72-77

Author(s):

KARPAKAVALLI MEENAKSHISUNDARAM ◽

PRAKASH GOVINDARAJ ◽

SIVASUBRAMANIAM P. ◽

RANJITHKUMAR DHANARAJ ◽

MOHAN SELLAPPAN

Keyword(s):

Wound Healing ◽

Research Work ◽

Algal Species ◽

Raw Material ◽

Spectral Studies ◽

Pharmacological Activities ◽

Methanolic Extracts ◽

Wide Range ◽

Marine Algal ◽

Wound Healing Activity

Objective: Algae is the undisputed treasures of the sea and are a valuable raw material, providing unlimited opportunities for new drug discoveries. Marine algal products are in demand in the international market in the form of standardized algal extracts or semi-finished products. Methods: Aqueous and methanolic extracts of Oedogonium globosum and Oedogonium intermedium species were obtained maceration and hot percolation. The active principles from O. intermedium were isolated, purified by column chromatography, and characterized by spectral studies IR, λmax, 1HNMR and MS. The extracts of Oedogonium species were screened for their anti-microbial effects, acute dermal irritation and wound-healing activity studies. Results: Comparing to Oedogonium intermedium (45 %, 90 %, 87 %), very low extractive yields were obtained for Oedogonium globosum (10.80 %, 37 %, 28 %). At phytochemical screening, Terpenoids, Flavanoids and, Glycans were found to be present in a significant amount and upon their isolation, it was found that a collection of fractions from cold extract with Rf value in the range 0.32-0.34 as Glycans and those from the hot extract with 0.40-0.72 as Flavanoids and those from methanolic extracts with 0.23, 0.44 and 0.71 as for Terpenoids. Anti-bacterial study revealed out the fact of Oedogonium species could give higher inhibition to gram-positive than for gram-negative bacteria at (10 μg/10μl/disc) concentration. No symptoms of systemic toxicity and mortality were observed. Silver sulfadiazine, more potent in wound closure, the effect of methanolic extracts of O. intermedium (87 %) was almost at par to the standard (95 %) in action and significantly greater than O. globosum (72 %, P<0.05). Conclusion: Admittedly, Oedogonium type algal species can be known as medicinal algae with a plethora of a wide range of pharmacological activities. Thus, this research work may be considered further for extensive innovative discoveries of new lead molecules and any other pharmacological activities, in the future.

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THE EFFECT OF TEMPERATURE ON THE GROWTH AND SURVIVAL OF SEVERAL MARINE ALGAL SPECIES

Biological Bulletin ◽

10.2307/1539381 ◽

1961 ◽

Vol 120 (2) ◽

pp. 255-264 ◽

Cited By ~ 43

Author(s):

RAVENNA UKELES

Keyword(s):

Algal Species ◽

Effect Of Temperature ◽

Growth And Survival ◽

Marine Algal

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Betaine Yields from Marine Algal Species Utilized in the Preparation of Seaweed Extracts Used in Agriculture

Natural Product Communications ◽

10.1177/1934578x1000500418 ◽

2010 ◽

Vol 5 (4) ◽

pp. 1934578X1000500 ◽

Cited By ~ 6

Author(s):

Gerald Blunden ◽

Peter F. Morse ◽

Imre Mathe ◽

Judit Hohmann ◽

Alan T. Critchley ◽

...

Keyword(s):

Marine Algae ◽

Algal Species ◽

First Record ◽

Commercial Production ◽

The Other ◽

Minor Constituent ◽

Laminaria Digitata ◽

Seaweed Extracts ◽

Marine Algal ◽

A Minor

Ascophyllum nodosum, and to a lesser extent, Laminaria digitata, L. hyperborea and Fucus serratus, are marine algal species utilized in the commercial production of seaweed extracts used in agriculture. Betaines have been shown to be important constituents of these extracts, but there appears to have been no study made on whether there are variations in the betaine contents of these species based on either the place or date of collection. Samples of each of the four species were collected from widely separated areas at different times of the year. Also, in the case of A. nodosum, approximately monthly collections were made from one location. The betaines detected in the various collections of the same species showed little variation, although in the case of A. nodosum, glycinebetaine was found as a minor constituent in some samples, but was not detected in others. Trigonelline was found in all the tested samples of the two Laminaria species; this is, to our knowledge, the first record of this betaine in marine algae. With the exception of trigonelline in the Laminaria species, the betaine yields from the various samples of L. digitata, L. hyperborea and F. serratus showed little variation, regardless of either the place or date of collection. The trigonelline contents of the Laminaria species collected at one location (Finavarra, Ireland), in particular of L. hyperborea, was substantially greater than those from the other places of collection. In the case of A. nodosum, the betaine yields from samples collected at one site (Dale, Pembrokeshire, UK) were significantly higher than those from the other places of collection, which were very similar to each other. There was no clear indication of seasonal variation in betaine yields from A. nodosum.

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Phototoxicity to selected marine and freshwater algae of polyacetylenes from species in the Asteraceae

Canadian Journal of Botany ◽

10.1139/b81-009 ◽

1981 ◽

Vol 59 (1) ◽

pp. 54-58 ◽

Cited By ~ 31

Author(s):

Thor Arnason ◽

Janet R. Stein ◽

Elizabeth Graham ◽

Chi-Kit Wat ◽

G. H. Neil Towers ◽

...

Keyword(s):

Small Group ◽

Algal Species ◽

Freshwater Algae ◽

Uv Treatment ◽

Marine Algal ◽

Aldehyde Groups ◽

Toxic Reactions

The phototoxicity of polyacetylenes from representatives of the Asteraceae to a broad range of freshwater and marine algal species was observed. In the tests triacetylenes were more toxic than diacetylenes. In addition, a small group of polyacetylenes with terminal alcohol or aldehyde groups were found to be toxic with or without ultraviolet (UV) treatment (300–400 nm). Quantitative tests with Euglena and Valonia indicated toxic reactions with three compounds at concentrations greater than 1 ppm. Considering the toxicity of polyacetylenes to bacteria, fungi, invertebrates, and fish, the present work with plants is further evidence of their general cytotoxic nature.

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