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Titolo:
Effect of UV radiation on photoinhibition of marine macrophytes in culturesystems
Autore:
Aguirre-von-Wobeser, E; Figueroa, FL; Cabello-Pasini, A;
Indirizzi:
Univ Autonoma Baja California, Inst Invest Oceanol, Ensenada 22800, Baja California, Mexico Univ Autonoma Baja California Ensenada Baja California Mexico 22800 exico Univ Autonoma Baja California, Fac Ciencias Marinas, Ensenada 22800, Baja California, Mexico Univ Autonoma Baja California Ensenada Baja California Mexico 22800 exico Univ Malaga, Fac Ciencias, Dept Ecol, E-29071 Malaga, Spain Univ Malaga Malaga Spain E-29071 ncias, Dept Ecol, E-29071 Malaga, Spain
Titolo Testata:
JOURNAL OF APPLIED PHYCOLOGY
fascicolo: 2, volume: 12, anno: 2000,
pagine: 159 - 168
SICI:
0921-8971(2000)12:2<159:EOUROP>2.0.ZU;2-I
Fonte:
ISI
Lingua:
ENG
Soggetto:
ULTRAVIOLET-B RADIATION; SOLAR-RADIATION; ARCTIC MACROALGAE; AMINO-ACIDS; PHOTOSYNTHESIS; PHYTOPLANKTON; FIELD; FLUORESCENCE; RHODOPHYTA; NITROGEN;
Keywords:
Chlorophyll fluorescence; Chondrus crispus; Macrocystis pyrifera; photosynthesis; photoinhibition; outdoor culture system; Ulva lactuca; UV-radiation;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Agriculture,Biology & Environmental Sciences
Citazioni:
30
Recensione:
Indirizzi per estratti:
Indirizzo: Cabello-Pasini, A Univ Autonoma Baja California, Inst Invest Oceanol, AP 453, Ensenada 22800, Baja California, Mexico Univ Autonoma Baja California AP 453 Ensenada Baja California Mexico 22800
Citazione:
E. Aguirre-von-Wobeser et al., "Effect of UV radiation on photoinhibition of marine macrophytes in culturesystems", J APPL PHYC, 12(2), 2000, pp. 159-168

Abstract

The present study examined the effect of UV and photosynthetically active radiation (PAR) on photoinhibition and recovery in the Phaeophyte Macrocystis pyrifera, the Rhodophyte Chondrus crispus and the Chlorophyte Ulva lactuca under outdoor culture conditions. There was an increase in photoinhibition as a consequence of high exposure to UV-B radiation in M. pyrifera, however, high levels of PAR accounted for most of the photoinhibition in C. crispus and U. lactuca. Photodamage by UV-A, UV-B and PAR was completely repaired within 5 h and effective quantum yield reached pretreatment values in the three species studied. Species were less susceptible to photoinhibition after being incubated for 5 d under high exposures of natural irradiance suggesting a photoadaptive process. The recovery of the effective quantum yield was impaired by long exposure to high levels of UV-B in C. crispus and UV-A, UV-B and PAR in M. pyrifera. This suggests a different kind of damage by UV-A and PAR radiation, one to the photosynthetic apparatus and another which affects the repair mechanism of some species. There was an increase in UV-absorption (lambda 330 nm) in M. pyrifera and C. crispus within four days of the initiation of the experiment suggesting that these species photoprotect their photosynthetic system when exposed to elevated UV and PAR levels.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 11/07/20 alle ore 17:26:55