Influence of type and concentration of sugars, supplemented with 8-hydroxyquinoline sulphate, on the vase life of waxflower

Abstract

A study was conducted to test the effect of 58.5 mM maltose, glucose, fructose, galactose and sucrose, and sucrose concentrations of 14.6, 29.2, 58.5 and 117.0 mM supplemented with 200 mg L -1 8-hydroxyquinoline sulphate (HQS) on the vase life and stem fresh weight changes in waxflower (Chamelaucium Desf.). The effect of the interaction between sucrose and HQS concentrations on the vase life of the cultivar 'Alba' was also investigated. All the types of exogenous sugar significantly increased the vase life of flowers, but decreased the vase life of leaves of waxflower cultivars compared with the deionized water controls, except the leaves of 'Lady Stephanie', 'Purple Pride' and 'Mullering Brook'. The flower vase life of almost all the cultivars treated with sucrose was not significantly different from the life of the cultivars kept in fructose and glucose, except 'Laura Mae Pearl', whose flower vase life in sucrose was significantly lower (9.7%) than in fructose. By contrast, the vase life of flowers of the cultivars treated with sucrose was longer than of those in maltose and galactose. At sucrose concentrations of up to 117.0 mM coupled with 200 mg L -1 HQS, the flower vase life of six out of eight cultivars significantly increased, except in 'Laura Mae Pearl' and 'Mullering Brook', whose flower vase life was maximized at the concentrations of 29.2 and 58.5 mM respectively, while the vase life of their leaves decreased. Sucrose concentrations from 14.6 to 29.2 mM coupled with 50 mg L -1 HQS maximized vase life for both the flowers and leaves of 'Alba'. Cultivars with a longer vase life of flowers maintained stem fresh weight above the initial stem fresh weight longer.

Changes in carbohydrates associated with senescence of cut gladiolus spikes under pulsing and wet cold storage durations

“…An innovation thatutilised an electrochemically treated solution containing potassium chloride, hypochloric acid and dissolved oxygen, into which cut flower stems were inserted, improved their quality and vase life (Abdolahi et al, 2013). Anumber of chemical treatments have been used to improve cut Gladiolus quality parameters (Bhat and Sheikh, 2015), while a similar fate was accomplished in some ornamental plants treated with preservative solutions containing glycerol and surfactants (Dung et al, 2017). The objective of this study was to evaluate the effect of pulsing and wet cold storage on the starch and sugar biomarkers on cut Gladiolus (Gladiolus grandiflorus L. cv.…”

EVALUATION OF DIFFERENT PRESERVATIVE SOLUTIONS AND PACKAGING MATERIAL FOR IMPROVING POST HARVEST QUALITY OF GLADIOLUS (Gladiolus grandiflorus) CUT SPIKES

“…Solution balance in cut spikes was changed when there was an imbalance in solution uptake and transpiration rate (Ha et al, 2017). The reason for the change in imbalance was a high concentration of sucrose that causes osmotic stress in flowers (Dung et al, 2017) along with increase microbial multiplication that leads to xylem vessels blockage (Yagi et al, 2014). Results related to the response of different gladiolus cultivars towards preservative solutions vary from variety to variety.…”

Promotion of flower opening in cut rose cultivars by 1-naphthaleneacetic acid treatment

“…Several studies have shown importance of sugar in flower opening and its vase life (Dung et al, 2017;Cavasini et al, 2018;Gómez-Merino et al, 2020). The accumulation of sugars in petal cells decreases the water potential, thus promoting water influx, which likely leads to cell enlargement and flower opening (Van Doorn and Kamdee, 2014).…”