Catalogo Articoli (Spogli Riviste)

OPAC HELP

Titolo:
Impacts of urban levels of ozone on Pinus halepensis foliage
Autore:
Soda, C; Bussotti, F; Grossoni, P; Barnes, J; Mori, B; Tani, C;
Indirizzi:
Univ Florence, Dept Plant Biol, I-50144 Florence, Italy Univ Florence Florence Italy I-50144 Plant Biol, I-50144 Florence, Italy Univ Newcastle Upon Tyne, Dept Agr & Environm Sci, Air Pollut Lab, Newcastle Upon Tyne NE1 7RU, Tyne & Wear, England Univ Newcastle Upon Tyne Newcastle Upon Tyne Tyne & Wear England NE1 7RU
Titolo Testata:
ENVIRONMENTAL AND EXPERIMENTAL BOTANY
fascicolo: 1, volume: 44, anno: 2000,
pagine: 69 - 82
SICI:
0098-8472(200008)44:1<69:IOULOO>2.0.ZU;2-Q
Fonte:
ISI
Lingua:
ENG
Soggetto:
LONG-TERM EXPOSURE; OPEN-TOP CHAMBERS; ABIES L KARST; PONDEROSA PINE; NORWAY SPRUCE; AIR-POLLUTION; SCOTS PINE; NEEDLE ULTRASTRUCTURE; QUERCUS-ILEX; MEXICO-CITY;
Keywords:
cell ultrastructure; Mediterranean; sulphur dioxide; symptomatology; urban air;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Agriculture,Biology & Environmental Sciences
Citazioni:
80
Recensione:
Indirizzi per estratti:
Indirizzo: Bussotti, F Univ Florence, Dept Plant Biol, Piazzale Cascine 28, I-50144 Florence, Italy Univ Florence Piazzale Cascine 28 Florence Italy I-50144 taly
Citazione:
C. Soda et al., "Impacts of urban levels of ozone on Pinus halepensis foliage", ENVIR EXP B, 44(1), 2000, pp. 69-82

Abstract

Between May and September, 1996, seedlings of Pinus halepensis were placedat a site adjacent to an automated air pollution monitoring station withinthe urban area of Florence. Additional 'control' plants were placed in chambers ventilated with charcoal/Purafil(R)-filtered air. All trees were wellwatered throughout the whole experimental period. During the exposure period, ambient levels of sulphur dioxide were very low, whilst the accumulatedhourly exposure to ozone above 40 ppb (i.e. AOT40) exceeded 20 000 ppb h(-1) peak hourly ozone concentrations rising to levels above 100 ppb. Trees exposed to ambient levels of air pollution exhibited typical symptoms of ozone damage (chlorotic mottle) on previous year needles toward the end of thesummer. Similar symptoms were not observed on equivalent trees exposed to filtered-air, nor were visible symptoms accompanied by insect or pest infestation. Anatomical and ultrastructural observations made on symptomatic needles revealed degeneration in mesophyll cells bordering sub-stomatal cavities and alterations in chloroplast ultrastructure (fat accumulation, starch and tannin pattern modifications). These observations are consistent with the known effects of air pollutants (namely ozone) recorded in the literature. Findings are discussed in relation to the impacts of ozone on P. halepensis in the Mediterranean region. (C) 2000 Elsevier Science B.V. All rights reserved.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 05/12/20 alle ore 01:33:11