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中国农学通报

中国农学通报 ›› 2019, Vol. 35 ›› Issue (26): 69-74.doi: 10.11924/j.issn.1000-6850.casb19010055

所属专题： 园艺

• 林学 园艺 园林 • 上一篇    下一篇

模拟冬春季温度变化对石蒜光合作用的影响

邓 波1, 智永祺2, 郑玉红①3, 周 坚2, 张鹏翀4   

  1. 1.南京农业大学园艺学院 江苏南京;2.南京林业大学生物与环境学院;3.江苏省中国科学院植物研究所;4.杭州植物园 浙江 杭州
  • 收稿日期:2019-01-09 修回日期:2019-08-09 接受日期:2019-07-01 出版日期:2019-09-16 发布日期:2019-09-16
  • 通讯作者: 邓 波
  • 基金资助:
    江苏省林业三新工程“林下药用石蒜等种植模式建立与技术示范”(LYSX[2014]52)；江苏省林业三新工程“林下适生石蒜选育及杨树－石 蒜栽培模式示范”(LYSX[2016]15)；杭州西湖风景名胜区（市园文局）科技发展计划“华东地区不同居群石蒜属种质资源变异类型的优良单株选育” (2014-002)；江苏省苏北科技专项“特色观赏植物石蒜属的引种、快繁及推广应用”(SZ-SQ2018005)；杭州市科技发展计划项目“‘中国郁金香’——石 蒜属新优品种的选育及推广应用研究”(20152231E02)。

Effects of Simulated Temperature Change on Photosynthesis of Lycoris radiata in Winter and Spring

  • Received:2019-01-09 Revised:2019-08-09 Accepted:2019-07-01 Online:2019-09-16 Published:2019-09-16

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摘要： 为了研究模拟温度变化对冬、春季石蒜光合作用的影响,利用人工气候箱模拟冬季和春季的温度变化,同时调节环境温度与叶室温度并使之一致,再测定石蒜光合作用参数。结果表明,与15℃温度条件相比,5℃亚低温对石蒜光合作用有影响,净光合速率(Pn)远远下降,而初始量子效率(α)正好相反。在不同温度下,光合光响应曲线不同：当环境温度为15℃时,只有当叶室温度等于环境温度时才出现正常曲线,在低光强下出现光饱和点(LSP)；当环境温度为5℃、叶室温度高于或低于10℃(5℃、15℃、20℃)时,光合光响应曲线正常,随着叶室温度的升高,Pn几乎降至零。

Abstract: To study the effects of simulate temperature change on photosynthesis of Lycoris radiata in winter and spring, the photosynthesis indexes were measured through the artificial climate chest to fix the environmental temperature with the change of cuvette temperature. The results showed that compared with 15℃, the photosynthesis of L. radiata was affected by mild hypothermia at 5℃, the net photosynthetic rate (Pn) was much lower than that under 15℃, but the initial quantum efficiency (α) was much higher. Under different temperatures, the photosynthetic light- response curves were different: when the ambient temperature was 15℃, the normal curve only appeared when cuvette temperature was equal to ambient temperature, and light saturation point (LSP) appeared at low light intensity; when ambient temperature was 5℃, the photosynthetic light-response process was normal when the cuvette temperature was above or below 10℃ (5, 15, 20℃), as the cuvette temperature rose, Pn dropped almost to zero.