Effects of Temperature and Gibberellin Treatment on Seed Germination Characteristics of Caryopteris incana (Thunb.) Miq.
Zhejiang Institute of Landscape Plants and Flowers, Hangzhou, 311251, China
Medicinal Plant Research, 2022, Vol. 12, No. 1 doi: 10.5376/mpr.2022.12.0001
Received: 06 Jan., 2022 Accepted: 15 Jan., 2022 Published: 29 Jan., 2022
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This article was first published in Molecular Plant Breeding in Chinese, and here was authorized to translate and publish the paper in English under the terms of Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
Preferred citation for this article:
Shi X.H., Ma G.Y., Jin L., and Zou Q.C., 2022, Effects of temperature and gibberellin treatment on seed germination characteristics of Caryopteris incana (Thunb.) Miq., Medicinal Plant Research, 12(1): 1-6 (doi: 10.5376/mpr.2022.12.0001)
Caryopteris incana (Thunb.) Miq. is an excellent ornamental, nectariferous plant and medicinal plant as a widely distributed species of the Caryopteris. Based on the determination of the length, width, 1 000-grain weight and water absorption of vanilla seeds, the effects of temperature and gibberellin treatment on seed germination were explored. The results showed that the average length and width of the seeds were 2.43 mm and 1.94 mm. The 1000-grain weight of the seeds was 0.57 g. The seed reached saturation after 4 hours of water absorption. Seeds can germinate at 15℃~30℃ and hardly germinated above 35℃. The optimal temperature for germination is 20℃~25℃. Gibberellin treatment can significantly improve the germination rate of Cyperus angustifolia, especially under the conditions of low temperature (15℃) and high temperature (35℃), 100 ~ 200 mg/L gibberellin treatment can improve the germination rate and shorten the germination period of the seeds. This study provides important theoretical support for the sowing and propagation of C. incana, and the theoretical basis for the planting and breed improvement of C. incana in the future.
Caryopteris incana (Thunb.) Miq.; Seed; Temperature; Gibberellin; Germination