Changes of cell wall hydrolases in relation to finger drop in ‘Hom Thomg’ and ‘Nam Wa’ bananas.
Imsabai W., Ketsa S.
5th International Postharvest Symposium . Volume of Abstract . Verona, Italy 6-11 June 2004. page 7
2004
บทคัดย่อ
Changes of cell wall hydrolases in relation to finger drop in ‘Hom Thomg’ and ‘Nam Wa’ bananas.
‘Hom Thong’ (musa aaa group) and ‘Nam Wa’ (Musa ABB group) bananas were treated with ethephon and ripened at 25 °C (~85% RH).Finger drop of ‘Hom Thong’ banana rapidly reached 100%, whereas ‘Nam Wa’ banana did not show finger drop 7 days after treatment.The rupture force and fruit firmness of both bananas decreased while ripening advanced and finger drop increased.‘Nam Wa’ banana had greater rupture force and fruit firmness than ‘Hom Thong’ banana.Polygalacturonase (PG) activity in the pedicel adjacent to rupture area was higher than that in the peel of both ‘Hom Thong’ and ‘Nam Wa’ bananas.PG activity in the pedicelo adjacent to the rupture area of ‘Hom Thong’ banana was higher than that of ‘Nam Wa’ banana.In contrast, pectinesterase (PE) activity in the pedicel adjacent to the rupture area of ‘Nam Wa’ banana was higher than that of ‘Hom Thong’ banana.It is concluded that PG activity may be involved in finger drop of ripening bananas.