Vascular Blockage, Water Absorption, Stomatal Opening, and Respiration of Cut ‘Better Times’ Roses Treated with 8-Hydroxyquinoline Citrate and Sucrose1

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Abstract
The efficacy of 8-hydroxy-quinoline citrate in prolonging the life of cut roses was due to decreased vascular blockage in stems, increased water absorption, and stomatal closure. Sucrose increased the respiratory rate of rose petals but 8-hydroxy-quinoline citrate did not influence respiration. Sucrose also prolonged life of cut roses by reducing stomatal opening but water absorption was reduced. A solution of 200 ppm 8-hy-droxyquinoline citrate and 3% sucrose improved longevity of cut roses by reducing moisture stress through increased water absorption and retention. Roses held in this solution lasted twice as long as roses held in water.