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Titolo:
EFFECTS OF ASCOCHYTA BLIGHT (MYCOSPHAERELLA-PINODES) ON THE PHOTOSYNTHESIZING LEAF-AREA AND THE PHOTOSYNTHETIC EFFICIENCY OF THE GREEN LEAF-AREA OF DRIED-PEA (PISUM-SATIVUM)
Autore:
GARRY G; JEUFFROY MH; NEY B; TIVOLI B;
Indirizzi:
INRA,PATHOL VEGETALE STN,BP 29 F-35650 LE RHEU FRANCE INRA,PATHOL VEGETALE STN F-35650 LE RHEU FRANCE INRA INAPG,UNITE AGRON F-78850 THIVERVAL GRIGNON FRANCE INAPG,DEPT AGER F-78850 THIVERVAL GRIGNON FRANCE
Titolo Testata:
Plant Pathology
fascicolo: 4, volume: 47, anno: 1998,
pagine: 473 - 479
SICI:
0032-0862(1998)47:4<473:EOAB(O>2.0.ZU;2-C
Fonte:
ISI
Lingua:
ENG
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Science Citation Index Expanded
Science Citation Index Expanded
Citazioni:
15
Recensione:
Indirizzi per estratti:
Citazione:
G. Garry et al., "EFFECTS OF ASCOCHYTA BLIGHT (MYCOSPHAERELLA-PINODES) ON THE PHOTOSYNTHESIZING LEAF-AREA AND THE PHOTOSYNTHETIC EFFICIENCY OF THE GREEN LEAF-AREA OF DRIED-PEA (PISUM-SATIVUM)", Plant Pathology, 47(4), 1998, pp. 473-479

Abstract

The effects of Ascochyta blight (caused by Mycosphaerella pinodes) onthe net photosynthetic rate of glasshouse-grown dried pea were studied on foliar discs and whole plants in pots showing different disease intensities, assessed visually using a disease scale (scores 0 to 5) orby an estimation of the fraction of leaf area with necrosis using an image analyser. The photosynthetic rate of foliar discs was measured using a leaf disc electrode; for plants it was assessed by CO2 exchangerate measurements in a closed chamber. A reduction in the net photosynthetic rate of diseased plants was correlated with an increase in disease score. A 53-56% reduction was found in foliar discs with a mean disease score of 3. On whole plants, mean scores of 3.5 and 4.0 were associated with reductions of 36% and 98% respectively. The disease alsoinduced a decrease in the photosynthetic efficiency of the non-necrotic leaf area. The photosynthetic rate was zero when 30-40% of foliar area was necrotic on foliar discs and on whole plants. A function was derived from the foliar disc data that described the dependence of photosynthetic rate on the fraction of leaf area without necrosis. The model is discussed with reference to data obtained from entire plants andother pathosystems.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 01/10/20 alle ore 01:26:11