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Investigation of Influence of Photoperiod and Light Intensity on Seed Germination and Seedling Growth of St. John's Wort (Hypericum perforatum L.)

By 張家綸, 林正宏, 鄧資新, Jia-Luen Jhang, Jeng-Horng Lin and Tzu-Shing Deng


The germination rate and seedling growth of St. John's wort (Hypericum perforatum L.) have been investigated under 5 photoperiods and 3 light intensities, respectively. The results reveal that the best photoperiod condition for the germination rate of H. perforatum is dark: light=18h: 6h. The germination rate of H. perforatum under this condition can reach 72 % on 21(superscript th) day after sowing. Germination rate of H. perforatum are all above 60 % on 21(superscript th) day after sowing under different conditions of light intensity. Among them, 150 μ mole photons m^(-2) s^(-1) is the best condition for germination of H. perforatum. The germination rate of H. perforatum of above-mentioned condition reaches 73 % on 21(superscript th) day after sowing. The results of seedling growth have shown that 12h/12h and 6h/18h (dark: light) are better conditions than other 3 treatments and the best condition of different light intensities is 350 μ mole photons m^(-2) s^(-1). The fresh weight of H. perforatum reaches 62 g after 6 months.聖約翰草分別利用5種光週期以及3種光強度進行種子發芽與種苗生長試驗,種子發芽試驗結果顯示,不同光週期試驗以18小時黑暗及6小時光照處理種子的發芽率最佳,於第21天後發芽率可達72%。不同光強度的試驗於第21天後發芽率都在60%以上,其中以150μ mole photons m^(-2)s^(-1)處理種子的發芽率最佳,於第21天後發芽率可達73%。種苗生長試驗結果顯示,不同光週期的試驗以12小時黑暗及12小時光照處理與6小時黑暗及18小時光照處理的生長狀態較其他3種處理為佳,不同光強度的試驗以350μ mole photons m^(-2)s^(-1)生長狀態最佳,6個月後植物鮮重可達62公克

Topics: St. John's wort Hypericum perforatum L., Seed germination, Seedling growth, Photoperiods, Light intensity, 聖約翰草, 種子發芽, 種苗生長, 光強度, 光週期
Publisher: 臺中巿: 國立中興大學農學院
Year: 2014
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