Effect of storage temperature, duration, and gibberellic acid on the flowering of Zantedeschia elliottiana and Zantedeschia 'Pink Satin'
1988
Funnell, K.A. | Tjia, B.O. | Stanley, C.J. | Cohen, D. | Sedcole, J.R.
Tubers of Zantedeschia elliottiana (Watson) Engl. and the hybrid Z. 'Pink Satin', a Z. rehmannii Engl.-like selection, were stored at 5 degrees C. Over a 3-month period they were transferred to incubators at 12 degrees, 18 degrees, or 24 degrees for 2, 4, 6, 8, or 12 weeks of holding. One-third of these tubers were planted in moist media during this time; the remaining tubers were stored dry and on removal were sprayed with either gibberellic acid (GA3) at 50 mg.liter-1 or distilled water before planting and transfer to a greenhouse. The proportion of flowering of dry-stored tubers of Z. elliottiana was reduced by prolonged storage at 5 degrees. Subsequent storage at 12 degrees did not reduce this proportion, but, at 18 degrees s and 24 degrees flowering was reduced further. Tubers of Z. 'Pink Satin' were less sensitive to the duration of dry storage at 5 degrees, but increasing time of storage at all subsequent temperatures caused a progressive decrease in the proportion of tubers that flowered. The proportion of moist-stored tubers of both selections that flowered was greater than that for tubers stored dry for an equivalent time. A preplant treatment with GA3 enabled almost total compensation for reduced flowering except after the longest period of storage.
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