Fluorescence transient in ozonated mediterranean shrubs (Articolo in rivista)

Type
Label
  • Fluorescence transient in ozonated mediterranean shrubs (Articolo in rivista) (literal)
Anno
  • 2004-01-01T00:00:00+01:00 (literal)
Alternative label
  • Paoletti E.., Bussotti F., Della Rocca G., Lorenzini G., Nali c., Strasser R.J. (2004)
    Fluorescence transient in ozonated mediterranean shrubs
    in Phyton (Horn)
    (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#autori
  • Paoletti E.., Bussotti F., Della Rocca G., Lorenzini G., Nali c., Strasser R.J. (literal)
Pagina inizio
  • 121 (literal)
Pagina fine
  • 131 (literal)
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  • 44 (literal)
Rivista
Note
  • ISI Web of Science (WOS) (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#affiliazioni
  • -Paoletti E., Della Rocca G., Istituto per la Protezione delle Piante, CNR, Sez. di Firenze, Via Madonna del Piano 10, I-50019 Firenze, Italy -Bussotti F., Dipartimento di Biologia vegetale, Università degli Studi di Firenze, Piazzale delle Cascine 28, I-50144 Firenze, Italy -Lorenzini G., Nali C., Dipartimento di Coltivazione e Difesa delle Specie Legnose \"G. Scaramuzzi\", Via del Borghetto 80, I-56124 Pisa, Italy -Strasser R.J., Univ Geneva, Department of Botany and Plant Biology, Lab Bioenerget & Microbiol, CH-1254 Geneva, Switzerland (literal)
Titolo
  • Fluorescence transient in ozonated mediterranean shrubs (literal)
Abstract
  • Three Mediterranean evergreen broadleaves, viz., laurel (Laurus nobilis), strawberry tree (Arbutus unedo) and phillyrea tree (Phillyrea latifolia), were exposed to 0, 55 or 110 nmol mol-1 O3. After 90 days, Chl a fluorescence was recorded and analysed with the 0JIP technique. Results confirmed that these species may be considered O3-tolerant. Even with slight responses to O3, the analysis of fluorescence transient gave useful information and highlighted a reduction in the density of active reaction centers in a PSII cross-section, and an increase of their activity in ozonated L. nobilis and mainly P. latifolia leaves. The realistic ambient spring concentration of 55 nmol mol-1 O3 slightly depressed the energy dissipation in A. unedo, and increased the performance index and the maximum quantum yield of primary photochemistry in L. nobilis and A. unedo. These responses are interpreted as over-compensation due to counter-O3-reactions. It is concluded that present ambient O3 levels do not impair the photosynthetic performances of these Mediterranean species in a 90-day term, even if recovery processes during the O3-free periods cannot be excluded. (literal)
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