Isolation and characterization of phytotoxic compounds produced by Phomopsis helianthi (Articolo in rivista)

Type
Label
  • Isolation and characterization of phytotoxic compounds produced by Phomopsis helianthi (Articolo in rivista) (literal)
Anno
  • 1999-01-01T00:00:00+01:00 (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#doi
  • 10.1002/(SICI)1522-7189(199905/06)7:3<119::AID-NT49>3.0.CO;2-P (literal)
Alternative label
  • Avantaggiato, G; Solfrizzo, M; Tosi, L; Zazzerini, A; Fanizzi, FP; Visconti, A (1999)
    Isolation and characterization of phytotoxic compounds produced by Phomopsis helianthi
    in Natural toxins (Print)
    (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#autori
  • Avantaggiato, G; Solfrizzo, M; Tosi, L; Zazzerini, A; Fanizzi, FP; Visconti, A (literal)
Pagina inizio
  • 119 (literal)
Pagina fine
  • 127 (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#numeroVolume
  • 7 (literal)
Rivista
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#pagineTotali
  • 9 (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#numeroFascicolo
  • 3 (literal)
Note
  • ISI Web of Science (WOS) (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#affiliazioni
  • Consiglio Nazionale delle Ricerche (CNR); University of Perugia; University of Bari; Ctr Canc Res (literal)
Titolo
  • Isolation and characterization of phytotoxic compounds produced by Phomopsis helianthi (literal)
Abstract
  • The isolation, chemical characterization and biological activity of two phytotoxic metabolites of Phomopsis helianthi Munt-Cvet et al. is reported. These compounds were identified by spectroscopic methods (UV, IR, H-1 and C-13 NMR, and MS) as trans-4,6-dihydroxymellein (trans-3-methyl-4,6,8-trihydroxy-3,4-dihyroisocoumarin) and cis-4,6-dihydroxymellein (cis-3-methyl-4,6,8-trihydroxy-3,4-dihydroisocoumarin). This is the first report of the isolation of trans-4,6-dihydroxymellein from fungal cultures and of the production of cis- and trans-4,6-dihydroxymelleins by P. helianthi. Rice was found to be a good substrate for the production of the dihydroxymelleins. Culture extracts of some Italian and French strains of P, helianthi showed different degrees of phytotoxicity towards sunflower leaves and seedlings. The minimum effective doses of trans- and cis-4,6-dihydroxymelleins with different bioassays were 76 and 135 mu g per spot (leaf puncture bioassay), 3 and 5 mu mol g(-1) fresh tissue (absorption by leaf cutting) and 5 and 2 mu mol g(-1) fresh tissue (absorption by cut seedlings), respectively. These compounds may contribute to the severity of the sunflower disease caused by P. helianthi. Copyright (C) 1999 John Wiley & Sons, Ltd. (literal)
Prodotto di
Autore CNR
Insieme di parole chiave

Incoming links:


Autore CNR di
Prodotto
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#rivistaDi
Insieme di parole chiave di
data.CNR.it