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Research articles

ScienceAsia 46 (2020): 271-279 |doi: 10.2306/scienceasia1513-1874.2020.032

Differences in floral development between Lycoris radiata and Lycoris sprengeri

Junhuo Caia,?, Junjun Fanb,?, Xuying Weic, Donglin Zhangd, Jiajia Rena, Lu Zhanga,e,*

ABSTRACT:     Lycoris radiata and Lycoris sprengeri are two typical plants of the genus Lycoris. They have different leafing and flowering patterns. To understand the habits of Lycoris species and regulate the flowering period effectively, we compared flower bud development of these two species using phenological, anatomical, and physiological measurements. Our results showed there were significant differences in phenology between the two species. The sprouting stage of L. radiata took place in autumn, the leaf growth period lasted seven months, dormancy lasted approximately 100 days before flowering, and there was no dormancy period after flowering. In comparison, the sprouting period of L. sprengeri was delayed until the spring of the following year, the leaf growth stage lasted approximately 3 months, the flowering stage took place from Jul–Aug, and dormancy lasted 1–2 months before flowering and for another 6 months after flowering. The flower bud differentiation processes of the two species were similar. During the entire flower bud differentiation process, the soluble sugar and protein contents, as well as the superoxide dismutase activity, in L. sprengeri bulbs were significantly higher than in L. radiata bulbs, whereas peroxidase activity was significantly lower.

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a College of Landscape and Art, Jiangxi Agricultural University, Nanchang 330045 China
b College of Horticulture, Jinling Institute of Technology, Nanjing 210037 China
c College of Art, Jiangxi Finance and Economics University, Nanchang 330032 China
d Department of Horticulture, University of Georgia, Athens, GA 30602 USA
e Collaboration Innovation Center of Jiangxi Typical Trees Cultivation and Utilization, Jiangxi Agricultural University, Nanchang 330045 China

* Corresponding author, E-mail: zhlu856@163.com

Received 12 Sep 2019, Accepted 21 Mar 2020