INFIVE   05416
INSTITUTO DE FISIOLOGIA VEGETAL
Unidad Ejecutora - UE
artículos
Título:
Heat treatments and expansin gene expression in strawberry fruit.
Autor/es:
DOTTO MC; POMBO MA; MARTÍNEZ GA; CIVELLO, PM
Revista:
SCIENTIA HORTICULTURAE
Editorial:
ELSEVIER SCIENCE BV
Referencias:
Lugar: Amsterdam; Año: 2011 vol. 130 p. 775 - 778
ISSN:
0304-4238
Resumen:
Heat treatments have been applied in fruit postharvest technology for
insect disinfestations, decay control, ripening delay and modification
of fruit responses to other stresses. Heat treatment affects several
aspects of fruit ripening, such as ethylene production and cell wall
degradation probably through changes in gene expression and protein
synthesis. In this paper, strawberries (Fragaria × ananassa
Duch., cv Camarosa) at 50?75% red stage of ripening were heat-treated
at 45 °C during 3 h in an air oven and then stored at 20 °C for 0, 4,
18, 24 and 48 h. Fruit firmness was determined and the expression of a
set of expansin genes (FaEXP1, FaEXP2, FaEXP4, FaEXP5 and FaEXP6)
was analyzed. The firmness of treated fruit was higher than that of
control fruit 24 h after treatment, though the differences disappeared
after 48 h at 20 °C. The analysis by northern-blot indicated that heat
treatments affected differently the expression of expansin genes. The
expression of FaEXP1, FaEXP2 and FaEXP6 was
lower in treated fruit during the following 24 h post-treatment. The
lower expression of these expansin genes could contribute to delay
softening after heat treatment.