摘要
为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,同时调节叶室温度与环境温度保持一致,测定石蒜光合作用参数。结果表明,与15℃温度条件相比,5℃亚低温条件下,石蒜净光合速率(Pn)下降幅度明显,而初始量子效率(α)明显升高。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。
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 with15℃,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 was15℃,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.
作者
邓波
智永祺
郑玉红
周坚
张鹏翀
Deng Bo;Zhi Yongqi;Zheng Yuhong;Zhou Jian;Zhang Pengchong(College of Horticulture,Nanjing Agricultural University,Nanjing 210095;College of Biology and Environment,Nanjing Forestry University,Nanjing 210037;Institute of Botany,Jiangsu Province and Chinese Academy of Science,Nanjing 210014;Hangzhou Botanical Garden,Hangzhou 310013)
出处
《中国农学通报》
2019年第26期69-74,共6页
Chinese Agricultural Science Bulletin
基金
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)
关键词
石蒜
温度变化
光合作用
模拟温度变化
Lycoris radiata
temperature change
photosynthesis
simulate temperature change
