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Water balance of the foliage of cut Geraldton waxflower.

Joyce, D. C.; Jones, P. N.;

Postharvest Biology and Technology Year: 1992 Vol: 2 Issue: 1 Pages: 31-39 Ref: 23 ref.

1992

บทคัดย่อ

Water balance of the foliage of cut Geraldton waxflower.

The foliage of cut Chamelaucium uncinatum often desiccates before flowers on the same sprig become senescent. Studies on senescence using cultivars Newmarracarra, Purple Pride and Alba are reported. The results of pressure-volume analysis comparing leafy and flowering sprigs suggested that the leaves have relatively higher turgor and lower osmotic potentials than the flowers, and that the leaves are less elastic. For a similar fall in relative water content, the water potential decreases more in foliage than in flowers. Exogenous ABA (10 p.p.m., 37.8 micro M) in the vase solution reduced vase water uptake and extended foliage longevity. The improved water balance achieved with ABA was apparently the result of stomatal closure. Inorganic salt (10 mM KCl) added to the vase solution also extended the longevity of the foliage.