Effect of promoter and inhibitors of phenylalanine ammonia-lyase enzyme on stem bending of cut Gerbera flowers
Articolo
Data di Pubblicazione:
2007
Citazione:
Effect of promoter and inhibitors of phenylalanine ammonia-lyase enzyme on stem bending of cut Gerbera flowers / A. Ferrante, A. Alberici, S. Antonacci, G. Serra. - In: ACTA HORTICULTURAE. - ISSN 0567-7572. - 755(2007), pp. 471-476.
Abstract:
The main postharvest disorder of cut gerbera flowers is the stem bending and
break. The cause of stem bending is not completely clear. Although the genetic
background seems to play the major role, some plant hormones such as ethylene and
cytokinins may enhance or reduce the incidence of stem break during postharvest
life. The choice of withstand genotypes seems to be a good strategy. In fact, stem
bending incidence strongly varies among cultivars. The aim of this work was to
evaluate the role of PAL activity and tissue lignifications on stem bending. Cut
gerbera flowers were obtained from local growers and immediately transferred to
postharvest evaluation room. Cut flowers were screened and selected in order to
have homogenous samples. Chemicals were applied as pulse treatments for 24 h
using 2 mM amino-oxyacetic acid (AOA), 1 mM α-aminooxi-β-phenylpropionic acid
(AOPP) or 100 μl L-1 ethylene.
During postharvest life the stem elongation, stem bending, PAL activity and
vase life were measured. Results showed a strong variation of stem bending
incidence among cultivars. Pulse treatments with PAL inhibitors such as AOA and
AOPP strongly increased stem bending even after 1-2 days after treatments.
Ethylene reduced the stem bending incidence increasing the PAL activity.
Tipologia IRIS:
01 - Articolo su periodico
Keywords:
AOA; AOPP; PAL; Postharvest
Elenco autori:
A. Ferrante, A. Alberici, S. Antonacci, G. Serra
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