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Titolo:
REFLECTANCE MEASUREMENTS OF LEAVES FOR DETECTING VISIBLE AND NON-VISIBLE OZONE DAMAGE TO CROPS
Autore:
KRAFT M; WEIGEL HJ; MEJER GJ; BRANDES F;
Indirizzi:
BUNDESFORSCH ANSTALT LANDWIRTSCHAFT,INST BIOSYST TECH,BUNDESALLEE 50 D-38116 BRAUNSCHWEIG GERMANY BUNDESFORSCH ANSTALT LANDWIRTSCHAFT,INST PROD & OKOTOXIKOL D-38116 BRAUNSCHWEIG GERMANY
Titolo Testata:
Journal of plant physiology
fascicolo: 1-2, volume: 148, anno: 1996,
pagine: 148 - 154
SICI:
0176-1617(1996)148:1-2<148:RMOLFD>2.0.ZU;2-A
Fonte:
ISI
Lingua:
ENG
Soggetto:
SPECTRAL REFLECTANCE; POLLUTANTS; INJURY;
Keywords:
TRITICUM AESTIVUM CV TURBO; TRIFOLIUM REPENS CV KARINA; ZEA MAYS CV BONNY; BLUE SHIFT; CLOVER; MAIZE; OZONE; RED EDGE; SPECTRAL REFLECTANCE; VEGETATION INDEX; WHEAT;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Science Citation Index Expanded
Citazioni:
25
Recensione:
Indirizzi per estratti:
Citazione:
M. Kraft et al., "REFLECTANCE MEASUREMENTS OF LEAVES FOR DETECTING VISIBLE AND NON-VISIBLE OZONE DAMAGE TO CROPS", Journal of plant physiology, 148(1-2), 1996, pp. 148-154

Abstract

Spring wheat (Triticum aestivum cv. Turbo), white clover (Trifolium repens cv. Karina) and maize (Zea mays cv. Bonny) plants were exposed for 20-30 days in open top chambers to charcoal-filtered air (CF, control) and CF air supplied with O-3 for 8-12 h/per day in the concentration range of 180-240 mu g O-3/m(3) (8-12 h/day treatment mean). At the end of the O-3 treatment spectral reflectance measurements were made on single leaves of all 3 species and on canopies of wheat and clover using a CCD (Charged Coupled Device) camera and wavelength filters with11 wavelength bands ranging from 450 nm to 950 nm. Different vegetation indices such as the normalized difference vegetation index (NDVI) and the <<main inflection point>> (MIP) were calculated. Based on theseresults it was shown that visible O-3 damages were correlated to the spectral reflectance changes. Both leaves and canopies showed an increased reflectance of visible light after ozone treatment. While clover and maize leaves as well as clover and wheat canopies showed a decreased near infrared (NIR) reflectance, the NIR reflectance of wheat leaves did not change, even if the leaves had visible symptoms. A decreasedinfrared reflectance was detectable for all clover leaves after O-3 treatment although for part of the leaves no visible foliar damage symptoms could be observed.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 28/09/20 alle ore 16:12:59