Data di Pubblicazione:
2011
Citazione:
Benzyladenine and thidiazuron postharvest treatments for preserving cut lily flowers / A. Ferrante, A. Trivellini, G. Serra. - In: ACTA HORTICULTURAE. - ISSN 0567-7572. - 900(2011), pp. 301-307. ((Intervento presentato al 2. convegno International Symposium on the Genus Lilium tenutosi a Pescia, Italy nel 2010.
Abstract:
The vase life of cut lilies stored for a long time or transported over long
distances, may be reduced. Typical postharvest problems are early tepal wilting and
abscission and leaf yellowing. Following harvest, chlorophyll losses are induced by
the lack of endogenous cytokinins, which are biosynthesized in roots. As the roots
are removed there is no cytokinin supply to the shoot in the postharvest phase. The
objective of this work was to evaluate thidiazuron as a potential postharvest
treatment for preventing chlorophyll losses during storage and for extending the
vase life. Lily flowers were harvested at commercial stage when buds begin to show
colour. Thidiazuron 10 μM was compared with benzyladenine 50 or 100 μM; both
were applied as pulse or continuous treatments. After storing cut flowers for three
weeks at 5°C, flowers were transferred to a postharvest evaluation room under
controlled environmental conditions. Vase life, chlorophyll content, weight change
and relative water content were monitored. Results showed that thidiazuron-treated
stems had higher chlorophyll content compared with the control and benzyladenine
treatments. After three weeks of cold storage, the chlorophyll content of
thidiazuron-treated flowers was 0.84 mg/g FW which was significantly higher than
the content of the control (0.57 mg/g FW). Thidiazuron slowed down the
degradation processes and, after storage, the chlorophyll decline was only 25% of
the initial value. Weight loss was higher in continuously applied treatments
compared with control and pulse treatments. In conclusion, results obtained showed
that the best treatment for preserving cut lilies was a pulse treatment for 24 h with
10 μM thidiazuron.
Tipologia IRIS:
01 - Articolo su periodico
Keywords:
Cytokinin; Postharvest; Senescence; Storage; TDZ; Yellowing
Elenco autori:
A. Ferrante, A. Trivellini, G. Serra
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