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Titolo:
INHIBITION OF BACTERIAL AND FUNGAL PLANT-PATHOGENS BY THIONINS OF TYPE-I AND TYPE-II
Autore:
MOLINA A; GOY PA; FRAILE A; SANCHEZMONGE R; GARCIAOLMEDO F;
Indirizzi:
UPM,ETS INGN AGRON E-28040 MADRID SPAIN UPM,ETS INGN AGRON E-28040 MADRID SPAIN CIBA GEIGY AG,DIV AGR CH-4002 BASEL SWITZERLAND
Titolo Testata:
PLANT SCIENCE
fascicolo: 2, volume: 92, anno: 1993,
pagine: 169 - 177
SICI:
0168-9452(1993)92:2<169:IOBAFP>2.0.ZU;2-S
Fonte:
ISI
Lingua:
ENG
Soggetto:
LEAF-SPECIFIC THIONINS; BARLEY; WHEAT; PROTEINS;
Keywords:
THIONINS; PLANT PATHOGENS; TRITICUM-AESTIVUM; HORDEUM-VULGARE;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Science Citation Index Expanded
Citazioni:
22
Recensione:
Indirizzi per estratti:
Citazione:
A. Molina et al., "INHIBITION OF BACTERIAL AND FUNGAL PLANT-PATHOGENS BY THIONINS OF TYPE-I AND TYPE-II", PLANT SCI, 92(2), 1993, pp. 169-177

Abstract

Thionins are cysteine-rich, 5 kDa polypeptides which are active against plant pathogens. Thionins of type I, from the endosperms of wheat (Walpha1, Walpha2, Wbeta) and barley (Balpha, Bbeta), and of type II, from barley leaves (BLa, BLb, BLc), have been purified to apparent homogeneity. For a given pathogen, the effective concentration giving 50% inhibition (EC-50) determined for the different thionins varied over aless than fivefold range. The ranking of the variants according to their activity differed among different pathogens, but certain variants,such as Walpha1, Wbeta or Bbeta, tended to be more active than the others. Strains of some bacterial species, such as Clavibacter michiganensis subsp. sepedonicus or Pseudomonas solanacearum were sensitive in the 2-3 x 10(-7) M concentration range, whereas the most sensitive fungal pathogens, such as Rosellinia necatrix, Colletotrichum lagenarium and Fusarium solani, had EC-50 values in the 1-4 x 10(-6) M range. Thionins, which were not particularly effective in liquid medium against Phytophthora infestans (EC-50 = 3.9 x 10(-5) M) were more effective than the fungicide Ridomil on a molar basis in a drop application assay on leaf discs from potato.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 24/09/20 alle ore 21:01:08