1-Methylcyclopropene (1-MCP) inhibits ethylene action and fruit quality achievement by binding to ethylene receptors. Developmental stage, timing, concentration and storage temperature may modulate 1-MCP effects. Ethylene and the antisenescent growth regulators polyamines (PAs) share a common precursor and may exert opposite effects. Nectarines (Prunus persica L. Batsch ‘Stark Red Gold’) were harvested and treated with 1-MCP for 12 h at 25°C, and then stored for 3 days at 25 or 4°C. At 25°C, 1-MCP strongly inhibited ethylene production and Pp-ACO gene expression, and development of quality parameters (softening, SSC, loss of acidity). At 4°C, ethylene production was not inhibited, but enhanced on the third day. A transient increase in endogenous PAs is associated with 1-MCP treatment, which at 4°C is accentuated, suggesting a combined negative effect of 1-MCP and cold stress. In fact, the 1-MCP-induced increase in PA levels seems to be more correlated with the cold stress than with preventing post-harvest ripening. Thus, in nectarines a single dose of 1-MCP is sufficient to improve post-harvest storage at 25°C, but has a less beneficial effect at 4°C.
1-MCP effects in nectarines: dependence on storage temperature, and relationship with polyamines / V. Ziosi; S. Biondi; P. Torrigiani; A. Rasori; A.M. Bregoli; G. Costa. - In: ACTA HORTICULTURAE. - ISSN 0567-7572. - STAMPA. - 682:(2005), pp. 1241-1248. (Intervento presentato al convegno Fifth International Postharvest Symposium tenutosi a Verona, Italy nel June 6-11, 2004) [10.17660/ActaHortic.2005.682.165].
1-MCP effects in nectarines: dependence on storage temperature, and relationship with polyamines.
ZIOSI, VANINA;BIONDI, STEFANIA;TORRIGIANI, PATRIZIA;BREGOLI, ANNA MARIA;COSTA, GUGLIELMO
2005
Abstract
1-Methylcyclopropene (1-MCP) inhibits ethylene action and fruit quality achievement by binding to ethylene receptors. Developmental stage, timing, concentration and storage temperature may modulate 1-MCP effects. Ethylene and the antisenescent growth regulators polyamines (PAs) share a common precursor and may exert opposite effects. Nectarines (Prunus persica L. Batsch ‘Stark Red Gold’) were harvested and treated with 1-MCP for 12 h at 25°C, and then stored for 3 days at 25 or 4°C. At 25°C, 1-MCP strongly inhibited ethylene production and Pp-ACO gene expression, and development of quality parameters (softening, SSC, loss of acidity). At 4°C, ethylene production was not inhibited, but enhanced on the third day. A transient increase in endogenous PAs is associated with 1-MCP treatment, which at 4°C is accentuated, suggesting a combined negative effect of 1-MCP and cold stress. In fact, the 1-MCP-induced increase in PA levels seems to be more correlated with the cold stress than with preventing post-harvest ripening. Thus, in nectarines a single dose of 1-MCP is sufficient to improve post-harvest storage at 25°C, but has a less beneficial effect at 4°C.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.