PJB-2023-121
Effects of cold storage duration and root zone temperature on flowering of amaryllis (Hippeastrum striatum ‘Blossom Peacock’)
Yumei Zhou, Zhuo Yang, Yuxin Zhang, Xiaoqiqi Qu and Juan Shen
Abstract
Cold storage and subsequent growth temperature are essential for flower bud differentiation, vegetative growth and flowering for bulbous plants. Amaryllis (Hippeastrum striatum ‘Blossom Peacock’), a perennial herbaceous bulbous plant, must undergo vernalization before blossom. In the present study, H. striatum ‘Blossom Peacock’ were stored at 7℃ for 30 and 45 days and then planted on the seedbeds with root zone temperatures of 22, 25, and 28℃. We found that no significant differences in flowering between 30 and 45 days of cold storage. Three constant root zone temperatures accelerated flowering 18 to 32 days but did not change the anthesis duration. The leaf size and the scale length at 28℃ root zone temperature were decreased by 29% compared to the control. The concentrations of nitrogen and phosphorus in the roots at 22℃ were 7% and 34% higher than those in the control. The root zone temperature of 25℃ increased the length, volume, and weight of the roots most and accelerated the flowering more obviously. The results suggest that 30 days cold storage is enough for the cultivar of ‘Blossom Peacock’ and different root zone temperatures have different effects on growth and flowering, which can be selected according to the market demand
To Cite this article:
Zhou, Y., Z. Yang, Y. Zhang, X. Qu and J. Shen. 2024. Effects of cold storage duration and root zone temperature on flowering of amaryllis (Hippeastrum striatum ‘Blossom Peacock’). Pak. J. Bot., 56(5): DOI: http://dx.doi.org/10.30848/PJB2024-5(16)
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