บทคัดย่องานวิจัย

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The possible involvement of a beta -D-glucosidase in postharvest leaf blackening in cut Protea flowers.

Jones, R.; Cass, A.;

Proceedings of the Australasian postharvest horticulture conference 'Science and technology for the fresh food revolution', Melbourne, Australia, 18-22 September, 1995. Year: 1996 Pages: 83-87 Ref: 10 ref.

1996

บทคัดย่อ

The possible involvement of a beta -D-glucosidase in postharvest leaf blackening in cut Protea flowers.

The activity of beta -D-glucosidase increased significantly prior to the onset of leaf blackening symptoms in cut flowers of several Protea species, but did not change in leaves held under lighted conditions strong enough to inhibit blackening. The increase in activity consistently preceded the onset of visual symptoms by approximately 24 h in 5 susceptible species. beta -D-glucosidase activity did not change, or decreased, in the leaves of species that did not exhibit leaf blackening. The most effective in vitro inhibitors of beta -D-glucosidase were Zn2+, Cu2+, ethanol and 4-methylpyrazole. A 30-50% ethanol dip or a 1% ethanol vase solution significantly inhibited beta -D-glucosidase activity and the onset of leaf blackening symptoms.