Nutritive value of marine algae <i>Laminaria japonica and Undaria pinnatifida</i>

Jurković, Nada; Kolb, N.; Čolić, Ivan

doi:10.1002/food.19950390108

Cited by 42 publications

(23 citation statements)

References 5 publications

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“…1 They are used in foods for their high mineral and protein contents or for the functional properties of their polysaccharides. [2][3][4] Seaweeds are presented as a complementary source of food protein for human and animal nutrition thanks to their high protein level and their amino acid composition. 5 However, little information is available about the digestibility of algal proteins, and experimental results have been inconclusive.…”

Section: Introductionmentioning

confidence: 99%

In vitro determination of digestible and unavailable protein in edible seaweeds

2002

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Edible seaweeds are considered a complementary source of food protein for human and animal nutrition. The physiological effects of seaweed protein depend on the degree of enzymatic digestion of protein in the small intestine and bacterial fermentation in the large intestine. The objective of this work was to estimate total, digestible, fermentable and unavailable protein in some red and brown seaweeds. Brown seaweeds Fucus vesiculosus, Laminaria digitata and Undaria pinnatifida and red seaweeds Chondrus crispus and Porphyra tenera were treated with pepsin and pancreatin to separate digestible protein. Residues containing indigestible protein were inoculated for 24 h with rat caecal droppings, and protein contents were evaluated in the non-fermented residue. Protein content in the seaweeds ranged from 8.9 to 25% of dry matter. Digestible protein was the major protein fraction (69%) only in P tenera; in the other seaweeds, this fraction ranged from 15 to 45%. Significant amounts of unavailable protein were found in all samples (2-24%). The distribution of total protein among the three fractions, ie digestible, fermentable and unavailable protein, could yield information about the physiological and metabolic consequences of the intake of seaweed proteins.

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Section: Introductionmentioning

confidence: 99%

In vitro determination of digestible and unavailable protein in edible seaweeds

2002

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“…As U. pinnatifida is an aquaculture species in Asia, there is a large body of literature on its reproduction (Kimura & Notoya 1996, Liu et al 2004, Choi et al 2005, growth (Ishikawa 1993, Oh & Koh 1996, and nutrition (Jurkovic et al 1995, Goni et al 2002. However, there is much less literature on the ecology of wild populations in its native range (but see Saito 1956, Saito 1975.…”

Section: Introductionmentioning

confidence: 99%

Interspecific and interhabitat variation in hsp70 gene expression in native and invasive kelp populations

Henkel

Kawai²,

Hofmann³

2009

Mar. Ecol. Prog. Ser.

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This study characterized the response to thermal stress in 3 kelp species to contribute to the understanding of the role of the heat shock response in species distributions and in native-invasive species interactions. We sampled the invasive kelp Undaria pinnatifida in its native range in Japan and its introduced range in California, USA, to investigate small-and large-scale differences in its response to temperature stress. We then conducted similar experiments on native kelp species in different habitats in California to investigate differences in the response among species and habitats. We examined temperature response by measuring the induction of the gene (hsp70) that encodes for heat shock protein 70 (Hsp70), which protects cellular proteins from mis-folding and degradation by environmental stress. Individuals of U. pinnatifida, and the native California species Egregia menziesii and Pterygophora californica were heat-shocked at a range of temperatures, and mRNA was extracted and analyzed for expression of hsp70. Significant differences in the timing and magnitude of hsp70 induction were observed between intertidal and harbor populations of U. pinnatifida within a few meters of each other in Japan, indicating environmentally driven variability in this response. Similarly, intertidal and subtidal populations of E. menziesii showed different responses, with subtidal E. menziesii populations responding more like subtidal P. californica populations. Native California species showed similar magnitudes of expression across all population, while U. pinnatifida collected from California harbors exhibited a more robust hsp70 response than native California species but was similar in magnitude to Japanese populations sampled.KEY WORDS: Kelp · hsp70 · Invasive · Native · Thermotolerance · qPCR · Undaria Resale or republication not permitted without written consent of the publisherIntertidal kelp populations exhibit faster heat shock gene up-regulation than submerged populations. Inset shows PCR amplification vs. cycle.

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“…The algae UP and SS contain a significant amount of cellulose and need specific enzyme activities to break the cellulose content (Jurkovic et al 1995). Sea cucumbers have lower specific enzyme activities and may not digest macroalgae such as SS and UP efficiently ).…”

Section: Discussionmentioning

confidence: 99%

Effects of different algae in diet on growth and interleukin (IL)-10 production of juvenile sea cucumber Apostichopus japonicus

et al. 2017

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The experiment was conducted to investigate the effects of different algae in diet on growth, survival, and interleukin-10 productions of sea cucumber. At first, a 9-week feeding trail was conducted to evaluate the growth performance and survival of the sea cucumber fed one of the six experimental diets containing ST (Sargassum thunbergii), UL (Ulva lactuca), UP (Undaria pinnatifida), LJ (Laminaria japonica), SS (Schizochytrium sp.), and NO (Nannochloropsis oculata) in a recirculating aquaculture system. The result showed that survival was not significantly different among the dietary treatments, and the specific growth rate (SGR) of sea cucumber fed the UL diet (1.58% d ) was significantly higher than that of sea cucumber fed the other diets (P < 0.05), except for the LJ and NO diets. Secondly, interleukin (IL)-10 gene expression was determined where mice splenocytes were stimulated with 10 μg ml −1 of sea cucumber extracts for 2 h. The result showed that IL-10 gene expression levels were significantly increased in UL, LJ, and NO diets fed sea cucumber extracts compared to other experimental diets. The results suggest that dietary inclusion with Ulva lactuca, Laminaria japonica, and Nannochloropsis oculata algae may improve the growth of juvenile sea cucumber and could upregulate IL-10 gene expression in mice splenocytes. Such detailed information could be helpful in further development of more appropriate diets for sea cucumber culture.

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Nutritive value of marine algae Laminaria japonica and Undaria pinnatifida

Cited by 42 publications

References 5 publications

In vitro determination of digestible and unavailable protein in edible seaweeds

In vitro determination of digestible and unavailable protein in edible seaweeds

Interspecific and interhabitat variation in hsp70 gene expression in native and invasive kelp populations

Effects of different algae in diet on growth and interleukin (IL)-10 production of juvenile sea cucumber Apostichopus japonicus

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