Light absorption by the chlorophyll a-b complexes of photosystem II in a leaf with special reference to LHCII. (Articolo in rivista)

Type
Label
  • Light absorption by the chlorophyll a-b complexes of photosystem II in a leaf with special reference to LHCII. (Articolo in rivista) (literal)
Anno
  • 2004-01-01T00:00:00+01:00 (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#doi
  • 10.1562/0031-8655(2004)080<0492:LABTCA>2.0.CO;2 (literal)
Alternative label
  • Rivadossi A; Zucchelli G; Garlaschi FM; Jennings RC (2004)
    Light absorption by the chlorophyll a-b complexes of photosystem II in a leaf with special reference to LHCII.
    in Photochemistry and photobiology
    (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#autori
  • Rivadossi A; Zucchelli G; Garlaschi FM; Jennings RC (literal)
Pagina inizio
  • 492 (literal)
Pagina fine
  • 498 (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#numeroVolume
  • 80 (literal)
Rivista
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#numeroFascicolo
  • 3 (literal)
Note
  • ISI Web of Science (WOS) (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#affiliazioni
  • Istituto di Biofisica del Consiglio Nazionale delle Rcerche-Sezione di Milano, Dipartimento di Biologia, Università degli Studi di Milano, Milani, Italy (literal)
Titolo
  • Light absorption by the chlorophyll a-b complexes of photosystem II in a leaf with special reference to LHCII. (literal)
Abstract
  • To investigate the light-harvesting properties of the Photosystem II chlorophyll (chl) a-b complexes (major light-harvesting complex of Photosystem II [LHCII], CP24, CP26, CP29) in a mature leaf under natural \"daylight\" illumination, the absorption spectra of the isolated complexes were converted into the photon absorption spectrum (1-T) within a leaf, using the approach of Rivadossi et al. ([1999] Photosynth. Res. 60, 209-215). In the Qy region, significant enhancement of light harvesting by the chl b electronic transitions, with respect to the absorption spectra (optical density [OD]), as well as a large and generalized increase (between two- and four-fold) associated with the vibrational bands of both chl a and b, was observed, which acquires an important light-harvesting role (approximately 30-40% of total). In the Soret region, a small increase in light harvesting by chl b was indicated. To gain more detailed information on these aspects the light harvesting of LHCII in a leaf was investigated. This required describing the pigment absorption (chl a and b, carotenoids) in the LHCII OD spectrum in terms of spectral subbands, which were subsequently used to estimate the relative light harvesting of each pigment type in LHCII of a leaf. When the entire visible spectral interval between 400 and 730 nm is considered, the chl a light harvesting is essentially unchanged with respect to the absorption spectrum (OD) of isolated LHCII, whereas the chl b contribution is 20% higher and the carotenoids are 33% lower. The relative enhancement of the chl b absorption is principally associated with the Qy electronic transition region, the light-harvesting contribution of which becomes prominent in the leaf. (literal)
Prodotto di
Autore CNR

Incoming links:


Autore CNR di
Prodotto
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#rivistaDi
data.CNR.it