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Titolo:
Ozone threshold doses and exposure-response relationships for the development of ozone injury symptoms in wild plant species
Autore:
Bergmann, E; Bender, J; Weigel, HJ;
Indirizzi:
Fed Agr Res Ctr, Inst Agroecol, FAL, D-38116 Braunschweig, Germany Fed AgrRes Ctr Braunschweig Germany D-38116 38116 Braunschweig, Germany
Titolo Testata:
NEW PHYTOLOGIST
fascicolo: 3, volume: 144, anno: 1999,
pagine: 423 - 435
SICI:
0028-646X(199912)144:3<423:OTDAER>2.0.ZU;2-2
Fonte:
ISI
Lingua:
ENG
Soggetto:
TROPOSPHERIC OZONE; GRASSLAND COMMUNITIES; CALCAREOUS GRASSLAND; AIR-POLLUTION; MAJOR L; GROWTH; SYSTEM; POPULATIONS; INDICATORS; HERBS;
Keywords:
ozone injury; wild plants; species sensitivity; ozone threshold dose; indicator plants;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Agriculture,Biology & Environmental Sciences
Citazioni:
44
Recensione:
Indirizzi per estratti:
Indirizzo: Bender, J Fed Agr Res Ctr, Inst Agroecol, FAL, Bundesallee 50, D-38116 Braunschweig,Germany Fed Agr Res Ctr Bundesallee 50 Braunschweig Germany D-38116 any
Citazione:
E. Bergmann et al., "Ozone threshold doses and exposure-response relationships for the development of ozone injury symptoms in wild plant species", NEW PHYTOL, 144(3), 1999, pp. 423-435

Abstract

The relative ozone sensitivities of 25 German native herbaceous plant species, representative of arable field margins or disturbed habitats, were examined over three consecutive growing seasons. Plants were grown from seed, potted into natural soils and exposed in open-top chambers for the entire season to different ozone-exposure regimes covering a range of concentrations from <5 to 48 ppb (seasonal 8 h daily mean). The assessment of ozone effects was carried out by recording the first day of visible symptom appearance and the percentage of injured leaves at the end of vegetative growth. Species exhibited contrasting patterns of symptom expression under ozone stress, with either ozone-specific symptoms or ozone-enhanced foliar pigmentation and senescence. Classifications of species according to their ozone susceptibility varied depending on whether measurement was of the total extent of visible injury, ozone threshold doses for the incidence of symptoms, or modelled exposure-response relationships. The most sensitive species exhibiting ozone-specific symptoms were Cirsium arvense and Sonchus asper, which responded to accumulated ozone exposures <1500 ppb.h (AOT40). For these and three other species, an AOT-CO peak of a single day was found to be responsible for the incidence of ozone-specific symptoms, i.e. injury occurred rapidly within a few days of the day with the highest AOT40, while other species responded only to longer-term ozone exposures. The relative ozone sensitivity of the species was calculated by combining the different sensitivity criteria, and possible systematic trends (taxonomic or evolutionary features) are pointed out. The results suggest it may be possible to use a particular group of native herbaceous plant species with contrasting patterns of ozone sensitivity as a biomonitoring system in the field. This allows plant responses to be related either to peak values or to prolonged ozone exposure, making it possible to distinguish between short- and long-term effects of ozone.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 25/09/20 alle ore 10:01:56