FRINK Linked Data Fragments server

Matches in SemOpenAlex for { <https://semopenalex.org/work/W2034286523> ?p ?o ?g. }

• W2034286523 endingPage "82" @default.
• W2034286523 startingPage "75" @default.
• W2034286523 abstract "The effect of ultraviolet (UV) radiation on thallus absorption, package effect, the concentration of photosynthetic pigments, photosynthetic oxygen production and effective quantum yield has been studied in the intertidal red macroalga Porphyra umbilicalis in the laboratory. High doses of UV-A and UV-B radiation result in a rapid decrease of thallus absorption and, after a 6 h exposure, total absorption is reduced to 25% of the initial value. Moreover, significant differences in the absorption peaks of the main pigments are found: while chlorophyll a (Chl a) and phycocyanin absorption peaks decrease by 65–67%, carotenoids and phycoerythrin (PE) peaks decrease by 75–82%. Uncoupling of the transfer of energy between PE and Chl a by UV is revealed by a gradual increase of fluorescence of PE up to 11 h of exposure, followed by a subsequent decrease of fluorescence of the PE, in parallel with the photobleaching of the pigments. Thalli with higher pigment concentration present a greater sensitivity to UV radiation, as revealed by a more pronounced decrease in total thallus absorption, oxygen production and effective quantum yield, and a less effective recovery under low irradiation. Exposure of the thalli to artificial UV radiation in an experimental chamber with spectra and doses more similar to those of the natural environment reveals that PAR + UV-A radiation promotes a gradual increase of the total absorption over 24 h; in contrast, PAR + UV-A + UV-B induces a significant decrease of the thallus absorption. However, the concentration in vitro of Chl a, carotenoids and biliproteins does not change in any of these light treatments. The spectrally averaged in vivo absorption cross section normalized to Chl a (a*) increases after 24 h in PAR + UV-A, but it does not change in PAR and PAR + UV- A + UV-B, indicating that the degree of packing of the pigments in the membranes of the thylakoids (package effect) is decreased by PAR + UV-A, but that the reverse is induced by PAR + UV-A + UV-B. It is proposed that UV-A radiation induces an enhancement of the efficiency of light capture mediated by a relaxation of pigment packing in the light-harvesting antennae of this intertidal macroalga, while the reverse is promoted by UV-B radiation." @default.
• W2034286523 created "2016-06-24" @default.
• W2034286523 creator A5008376263 @default.
• W2034286523 creator A5013156029 @default.
• W2034286523 creator A5014423333 @default.
• W2034286523 creator A5039087926 @default.
• W2034286523 creator A5070577628 @default.
• W2034286523 date "1999-01-01" @default.
• W2034286523 modified "2023-10-16" @default.
• W2034286523 title "Effect of ultraviolet radiation on thallus absorption and photosynthetic pigments in the red alga Porphyra umbilicalis" @default.
• W2034286523 cites W1501566966 @default.
• W2034286523 cites W1542162133 @default.
• W2034286523 cites W1572761114 @default.
• W2034286523 cites W1966817471 @default.
• W2034286523 cites W1967559090 @default.
• W2034286523 cites W1969756126 @default.
• W2034286523 cites W1975892234 @default.
• W2034286523 cites W1976899715 @default.
• W2034286523 cites W1981796700 @default.
• W2034286523 cites W1983859396 @default.
• W2034286523 cites W1997636729 @default.
• W2034286523 cites W2006930341 @default.
• W2034286523 cites W2009143422 @default.
• W2034286523 cites W2010798993 @default.
• W2034286523 cites W2012718269 @default.
• W2034286523 cites W2013090468 @default.
• W2034286523 cites W2016473644 @default.
• W2034286523 cites W2024249100 @default.
• W2034286523 cites W2031091030 @default.
• W2034286523 cites W2039368901 @default.
• W2034286523 cites W2039429793 @default.
• W2034286523 cites W2039456670 @default.
• W2034286523 cites W2045840271 @default.
• W2034286523 cites W2047945785 @default.
• W2034286523 cites W2049678562 @default.
• W2034286523 cites W2059796431 @default.
• W2034286523 cites W2065138436 @default.
• W2034286523 cites W2073286059 @default.
• W2034286523 cites W2076987506 @default.
• W2034286523 cites W2132273760 @default.
• W2034286523 cites W2132421374 @default.
• W2034286523 cites W2160743573 @default.
• W2034286523 cites W2338412241 @default.
• W2034286523 doi "https://doi.org/10.1016/s1011-1344(99)00015-9" @default.
• W2034286523 hasPublicationYear "1999" @default.
• W2034286523 type Work @default.
• W2034286523 sameAs 2034286523 @default.
• W2034286523 citedByCount "47" @default.
• W2034286523 countsByYear W20342865232012 @default.
• W2034286523 countsByYear W20342865232013 @default.
• W2034286523 countsByYear W20342865232014 @default.
• W2034286523 countsByYear W20342865232015 @default.
• W2034286523 countsByYear W20342865232016 @default.
• W2034286523 countsByYear W20342865232018 @default.
• W2034286523 countsByYear W20342865232019 @default.
• W2034286523 countsByYear W20342865232020 @default.
• W2034286523 countsByYear W20342865232021 @default.
• W2034286523 crossrefType "journal-article" @default.
• W2034286523 hasAuthorship W2034286523A5008376263 @default.
• W2034286523 hasAuthorship W2034286523A5013156029 @default.
• W2034286523 hasAuthorship W2034286523A5014423333 @default.
• W2034286523 hasAuthorship W2034286523A5039087926 @default.
• W2034286523 hasAuthorship W2034286523A5070577628 @default.
• W2034286523 hasConcept C124743340 @default.
• W2034286523 hasConcept C125287762 @default.
• W2034286523 hasConcept C137243819 @default.
• W2034286523 hasConcept C159985019 @default.
• W2034286523 hasConcept C178790620 @default.
• W2034286523 hasConcept C183688256 @default.
• W2034286523 hasConcept C185592680 @default.
• W2034286523 hasConcept C192562407 @default.
• W2034286523 hasConcept C24630173 @default.
• W2034286523 hasConcept C2776373379 @default.
• W2034286523 hasConcept C2778093064 @default.
• W2034286523 hasConcept C2778177487 @default.
• W2034286523 hasConcept C2778902199 @default.
• W2034286523 hasConcept C2779669040 @default.
• W2034286523 hasConcept C2780505102 @default.
• W2034286523 hasConcept C523546767 @default.
• W2034286523 hasConcept C54355233 @default.
• W2034286523 hasConcept C553184892 @default.
• W2034286523 hasConcept C559758991 @default.
• W2034286523 hasConcept C59822182 @default.
• W2034286523 hasConcept C64584667 @default.
• W2034286523 hasConcept C75473681 @default.
• W2034286523 hasConcept C86803240 @default.
• W2034286523 hasConceptScore W2034286523C124743340 @default.
• W2034286523 hasConceptScore W2034286523C125287762 @default.
• W2034286523 hasConceptScore W2034286523C137243819 @default.
• W2034286523 hasConceptScore W2034286523C159985019 @default.
• W2034286523 hasConceptScore W2034286523C178790620 @default.
• W2034286523 hasConceptScore W2034286523C183688256 @default.
• W2034286523 hasConceptScore W2034286523C185592680 @default.
• W2034286523 hasConceptScore W2034286523C192562407 @default.
• W2034286523 hasConceptScore W2034286523C24630173 @default.
• W2034286523 hasConceptScore W2034286523C2776373379 @default.
• W2034286523 hasConceptScore W2034286523C2778093064 @default.
• W2034286523 hasConceptScore W2034286523C2778177487 @default.

• next