Search results for "Dictyotales"

showing 2 items of 2 documents

Interspecific variation in total phenolic content in temperate brown algae

2017

Marine algae synthesize secondary metabolites such as polyphenols that function as defense and protection mechanisms. Among brown algae, Fucales and Dictyotales (Phaeophyceae) contain the highest levels of phenolic compounds, mainly phlorotannins, that play multiple roles. Four temperate brown algae (Cystoseira amentacea, Cystoseira compressa, Dictyopteris polypodioides and Padina pavonica) were studied for total phenolic contents. Total phenolic content was determined colorimetrically with the Folin-Ciocalteu reagent. Significant differences in total phenolic content were observed between leathery and sheetlike algae and also within each morphological group. Among the four species, the she…

0106 biological sciencesPhaeophyceaePadina pavonicamacromolecular substancesPlant Science010501 environmental sciencesBiology01 natural sciencesGeneral Biochemistry Genetics and Molecular BiologySecondary metaboliteAlgaeBotanyMediterranean SeaTemperate climateSettore BIO/04 - Fisiologia Vegetalelcsh:QH301-705.5External and internal factorTotal phenolic content0105 earth and related environmental sciencesExternal and internal factorsSecondary metabolitesSettore BIO/02 - Botanica Sistematica010604 marine biology & hydrobiologyBiochemistry (medical)DictyotalesInterspecific competitionbiology.organism_classificationBrown algaelcsh:Biology (General)PolyphenolSettore BIO/03 - Botanica Ambientale E ApplicataFucalesJournal of Biological Research - Bollettino della Società Italiana di Biologia Sperimentale
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Macroalgal responses to ocean acidification depend on nutrient and light levels

2015

Ocean acidification may benefit algae that are able to capitalize on increased carbon availability for photosynthesis, but it is expected to have adverse effects on calcified algae through dissolution. Shifts in dominance between primary producers will have knock-on effects on marine ecosystems and will likely vary regionally, depending on factors such as irradiance (light vs. shade) and nutrient levels (oligotrophic vs. eutrophic). Thus experiments are needed to evaluate interactive effects of combined stressors in the field. In this study, we investigated the physiological responses of macroalgae near a CO2 seep in oligotrophic waters off Vulcano (Italy). The algae were incubated in situ …

macroalgaelcsh:QH1-199.5Padina pavonicaocean acidificationOcean Engineeringphenolic compoundslcsh:General. Including nature conservation geographical distributionAquatic SciencePhotosynthetic efficiencyOceanographyPhotosynthesisNutrientAlgaeBotanyMarine Sciencelcsh:ScienceWater Science and TechnologyGlobal and Planetary ChangephotosynthesisbiologyDictyotalesbiology.organism_classificationphotophysiologyEnvironmental chemistrylcsh:Qnutrient availabilityFucalesEutrophicationFrontiers in Marine Science
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