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弱光下长期亚适温和短期低温对黄瓜生长及光合作用的影响
引用本文:艾希珍,马兴庄,于立明,邢禹贤.弱光下长期亚适温和短期低温对黄瓜生长及光合作用的影响[J].应用生态学报,2004,15(11):2091-2094.
作者姓名:艾希珍  马兴庄  于立明  邢禹贤
作者单位:1. 山东农业大学园艺学院,泰安,271018
2. 山东东营市胜大农业公司,东营,257102
3. 山东即墨市高新农业技术开发区,即墨,266100
基金项目:国家自然科学基金项目 (3 0 0 70 45 8),山东省自然科学基金资助项目 (Y2 0 0 2D0 5 )
摘    要:弱光下长期亚适温(T1)和短期低温(T2)对黄瓜幼苗的生长及光合作用有重要影响,表现为生长速度、Pn、CE、AQY、ФPSⅡ等均显著降低,最大光化学效率PsⅡ(Fv/Fm)也有所下降.两个处理相比,T1的Pn、CE、AQY降低幅度较小,但恢复速度慢;而T2降低幅度大,但短期内即可恢复正常.Fv/Fm和ФPSⅡ则是T1降低幅度小且恢复快;而T2降低幅度大,恢复速度也较慢.处理后T1的Chla、Chlb和Car含量均显著增加,而T2的含量则明显降低,T1、T2的Chla/b均显著下降.随着恢复时间的延长,Tl的色素含量多有下降趋势。T2逐渐增加,恢复3d时,含量均高于CK,而Chla/b在恢复期间没有显著变化,仍明显低于CK。

关 键 词:弱光  长期亚适温  短期低温  光合作用  生长速度  黄瓜
文章编号:1001-9332(2004)11-2091-04
修稿时间:2003年8月11日

Effect of long-term suboptimal temperature and short-term low temperature under low light density on cucumber growth and its photosynthesis
AI Xizhen,MA Xingzhuang,YU Liming,XING Yuxian.Effect of long-term suboptimal temperature and short-term low temperature under low light density on cucumber growth and its photosynthesis[J].Chinese Journal of Applied Ecology,2004,15(11):2091-2094.
Authors:AI Xizhen  MA Xingzhuang  YU Liming  XING Yuxian
Institution:College of Horticulture, Shandong Agricultural University, Taian 271018, China. axz@sdau.edu.cn
Abstract:The study on the effects of long-term suboptimal temperature (T1) and short-term low temperature (T2) under low light density on cucumber seedling's growth and its photosynthesis showed that the growth speed, photosynthetic rate (Pn), carboxylation efficiency (CE), apparent quantum yield (AQY) and actual quantum yield of P(S II) electron transport (phi(PS II)) all declined remarkably, and the photochemical efficiency of PS II (Fnu/Fm) also decreased to some extent. The decreasing extents of Pn, CE and AQY of T1 were less than those of T2, while the recovery rate of T1 was slower than that of T2. The Fnu/Fm and phi(PS II) of T1 declined to less extent and resiled quickly, while those of T2 decreased to larger extent and recovered slowly. The contents of chlorophyll a, chlorophyll b and carotenoid of T1 increased remarkably after being treated, while those of T2 decreased evidently. The Chl a/b of both T1 and T2 declined remarkably. With recovery time going, the pigment of T1 declined under most conditions, while that of T2 increased gradually. Three days later, the pigment content of T1 and T2 were both higher than control. The Chl a/b had no significant change during the recovery period, and was still obviously lower than control.
Keywords:Low light density  Long-term suboptimal temperature  Short-term low temperature  Photosynthesis  Growth speed  Cucumber  
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