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Titolo:
INDUCTION OF PHENYLALANINE AMMONIA-LYASE ACTIVITY AND CONTROL OF SPHAEROPSIS-SAPINEA INFECTION IN PINUS-RADIATA BY 5-CHLOROSALICYLIC ACID
Autore:
REGLINSKI T; STAVELY FJL; TAYLOR JT;
Indirizzi:
HORT & FOOD RES INST NEW ZEALAND LTD,RUAKURA RES CTR,PRIVATE BAG 3123HAMILTON NEW ZEALAND
Titolo Testata:
European journal of forest pathology
fascicolo: 3, volume: 28, anno: 1998,
pagine: 153 - 158
SICI:
0300-1237(1998)28:3<153:IOPAAA>2.0.ZU;2-C
Fonte:
ISI
Lingua:
ENG
Soggetto:
PLANT DEFENSE RESPONSES; PHENYLPROPANOID METABOLISM; SALICYLIC-ACID; LODGEPOLE PINE; CELL-CULTURES; RESISTANCE; ELICITORS;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Science Citation Index Expanded
Citazioni:
20
Recensione:
Indirizzi per estratti:
Citazione:
T. Reglinski et al., "INDUCTION OF PHENYLALANINE AMMONIA-LYASE ACTIVITY AND CONTROL OF SPHAEROPSIS-SAPINEA INFECTION IN PINUS-RADIATA BY 5-CHLOROSALICYLIC ACID", European journal of forest pathology, 28(3), 1998, pp. 153-158

Abstract

Phenylalanine ammonia lyase (PAL) activity increased rapidly in Pinusradiata seedlings after treatment with 2 mM 5-chlorosalicylic acid (5CSA) and peaked after 48 h at four-times the level of the control. Elevation of PAL is often associated with the induction of host resistance mechanisms. Thus, effects of 5CSA on subsequent infection of P. radiata by Sphaeropsis sapinea Nas investigated. Only one out of 16 seedlings treated with 2 mh? 5CSA, 4 days before inoculation, developed deadtop compared to 14 of the controls. The 5CSA was directly inhibitory at this concentration and reduced growth rate of S. sapinea on agar by 27%. However, antifungal activity does not fully account for the observed disease control afforded by 5CSA since 0.5 mM and 0.25 mM 5CSA, which did not inhibit growth of S. sapinea, significantly reduced the incidence of deadtop Furthermore, 1 mh? 5CSA protected seedlings againstfresh inoculation challenge for up to 32 days after application. Suchdurable resistance is unlikely to be attributable to the direct effects of the applied compound and may suggest the involvement of inducible host resistance mechanisms.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 16/07/20 alle ore 16:46:45