Salinity Induced Changes in Peroxidase Activity in the Green Seaweed <i>Ulva lactuca</i>

Murthy, M. S. R.; Sharma, Chand; Rao, Y. N.

doi:10.1515/botm.1988.31.4.307

Cited by 10 publications

(5 citation statements)

References 20 publications

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“…The percentages of recovery rates of chlorophyll of Nori and Sea Lettuce are similar to the observed values in peas (60-87%, Gallardo-Guerrero, Gandul-Rojas, & Mínguez-Mosquera, 2008) and in an oily mixture of chlorophyll standards (50-82%, Gandul-Rojas, Gallardo-Guerrero, & Mínguez-Mosquera, 2009). The loss of chlorophyll pigments during in vitro digestion may be due to the activity of peroxidase and lipoxygenase, which contributes to degrading chlorophyll pigments, as stated previously (Gallardo-Guerrero, Gandul-Rojas, & Mínguez-Mosquera, 2008) since peroxidase (Murthy, Sharma, & Rao, 1988) and lipoxygenase (Kuo, Hwang, Hsu, & Pan, 1996) has been identified to be widely distributed in seaweed.…”

Section: Recovery Rate Of Chlorophyll Derivatives From Fresh Dried Sesupporting

confidence: 85%

In vitro digestion of chlorophyll pigments from edible seaweeds

Chen

Roca

2018

Journal of Functional Foods

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The three most common edible seaweeds, Nori (Porphyra umbilicalis), Sea Lettuce (Ulva sp.) and Kombu (Laminaria ochroleuca), were subjected for the first time to an in vitro digestion process in order to study the digestive stability and recovery of chlorophyll pigments of the a, b and c series. Due to the complex and diverse chlorophyll profile in these seaweeds, new principles regarding the behaviour of chlorophylls during the in vitro digestion were obtained.

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Section: Recovery Rate Of Chlorophyll Derivatives From Fresh Dried Sesupporting

confidence: 85%

In vitro digestion of chlorophyll pigments from edible seaweeds

Chen

Roca

2018

Journal of Functional Foods

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“…Similarly, Kamer and Fong (2000) found that exposure to 15 psu conditions for 5 d periods decreased E. intestinalis growth. Ulva lactuca growth has been reduced by salinity between 20 and 30 psu (Murthy et al 1988, Friedlander 1992, and other less closely related bloom-forming species (Gracilaria spp., Cladophora spp.) have also been negatively affected by reduced salinity (Bird & McLachlan 1986, Thomas et al 1988.…”

Section: Discussionmentioning

confidence: 99%

“…To maintain osmotic balance with the external environment, algae regulate their internal solute concentration, which requires energy (Kirst 1989). As a result, algal growth and productivity may be reduced (Bird et al 1979, Bird & McLachlan 1986, Edwards et al 1988, Murthy et al 1988, Thomas et al 1988, Karsten & Kirst 1989, Friedlander 1992.…”

Section: Introductionmentioning

confidence: 99%

Nitrogen enrichment ameliorates the negative effects of reduced salinity on the green macroalga Enteromorpha intestinalis

Kamer¹,

Fong²

2001

Mar. Ecol. Prog. Ser.

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In southern California estuaries, the green macroalga Enteromorpha intestinalis experiences wide fluctuations in both nitrogen (N) supply and salinity. We investigated the effects of simultaneous variation in N and salinity on the growth, biomass accumulation and tissue nutrient dynamics of E. intestinalis. We conducted a fully crossed 2-factor experiment in which we varied N enrichment (low, medium and high) and salinity (15, 25 and 35 psu). Overall, addition of N enhanced algal growth while salinity reduction decreased growth. High N enrichment mitigated the negative effects that reduced salinity had on dry biomass, wet:dry biomass ratios, tissue nutrients and ability to remove phosphorus from the water column. Largely, E. intestinalis abundance was governed by N availability rather than salinity, indicating that blooms of macroalgae will likely continue to proliferate in estuaries unless nutrient loading is reduced.

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“…Some studies suggest that other green macroalgae, e.g., Enteromorpha, are more tolerant of reduced or elevated salinity than Ulva (Martins et al 1999). In contrast, U. lactuca in culture was more tolerant of hyper-than hyposalinity (Murthy et al 1988). U. rotundata in the field has been growing in salinities ranging from 26 to36 psu (De Casabianca 1989), and U. rigida bloomed in summer when salinity remained above 20 psu (Fillit 1995).…”

Section: Growth Rate and Nutrient Uptakementioning

confidence: 99%

Effect of salinity on growth and nutrient uptake of Ulva pertusa (Chlorophyta) from an eelgrass bed

Choi¹,

Kang²,

Kim³

et al. 2010

ALGAE

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The effects of salinity on various ecophysiological parameters of Ulva pertusa such as growth, nutrient uptake, photosynthetic performance and internal nutrient composition were tested. U. pertusa was collected from an eelgrass bed in a semi-protected embayment on the southwest coast of Korea. Under salinity regimes from 5 to 40 psu, the specific growth rates (µ) of U. pertusa ranged from 0.019 to 0.032 d-1. Maximum growth rate was observed at 20 psu, and minimum at 40 psu. This species showed various uptake rates for nitrate and phosphate. Nutrient uptake was noticeably higher at intermediate salinity levels, and lower at both extremes. Salinity significantly influenced chlorophyll-a content and effective quantum yield. Tissue nitrogen content ranged from 1.5 to 2.9% N (dry weight), whereas tissue phosphorus ranged from 0.1 to 0.14% P (dry weight). The N : P ratio in the tissue of U. pertusa was considerably higher, ranging from 30 to 50. Increased growth at lower salinity suggests that the initial growth rate of U. pertusa is greater during the rainy season (i.e., late spring and early summer) than any other season during the year. The appearance of an Ulva bloom in eelgrass beds may be triggered by salinity more than by other environmental factors such as light and temperature.

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Salinity Induced Changes in Peroxidase Activity in the Green Seaweed Ulva lactuca

Cited by 10 publications

References 20 publications

In vitro digestion of chlorophyll pigments from edible seaweeds

In vitro digestion of chlorophyll pigments from edible seaweeds

Nitrogen enrichment ameliorates the negative effects of reduced salinity on the green macroalga Enteromorpha intestinalis

Effect of salinity on growth and nutrient uptake of Ulva pertusa (Chlorophyta) from an eelgrass bed

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