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6种树种叶片叶绿素荧光动力学参数对土壤水分变化的响应

张国盛1*,郝蕾1,闫子娟1,赵鑫1,王颖3,白玉荣2,李小龙4 #br#   

  1. (1内蒙古农业大学林学院, 呼和浩特 010019; 2呼伦贝尔市林业科学研究所, 内蒙古海拉尔 021008; 3鄂尔多斯市乌审旗林业局, 内蒙古嘎鲁图 017300; 4内蒙古乌兰察布市林业局, 内蒙古集宁 012000)
  • 出版日期:2017-11-10 发布日期:2017-11-10

The responses of chlorophyll fluorescence kinetics parameters of six tree species to soil moisture changes.

ZHANG Guo-sheng1*, HAO Lei1, YAN Zi-juan1, ZHAO Xin1, WANG Ying3, BAI Yu-rong2, LI Xiao-long4#br#   

  1. (1Forestry College of Inner Mongolia Agricultural University, Huhhot 010019, China; 2Forestry Science Institute of Hulunbeier City, Hailar 021008, Inner Mongolia, China; 3Forestry Bureau of Wushen Banner, Erdos 017300, Inner Mongolia, China; 4Forestry Bureau of Inner Mongolia Wulanchabu City, Jining 012000, Inner Mongolia, China).
  • Online:2017-11-10 Published:2017-11-10

摘要: 采用便携式调制叶绿素荧光仪(MiniPAM),于2015年生长季节对6种固沙树种:沙柳(Salix psammophila C. Wang et Ch.Y. Yang)、黄柳(Salix gordejevii Y.L. Chang et Skv.)、沙枣(Elaeagnus angustifolia L.)、掌裂草葡萄(Ampelopsis aconitifolia var. glabra Diels)、紫穗槐(Amorpha fruticosa L.)和沙冬青(Ammopiptanthus mongolicus (Maxim. ex Kom.) S.H. Cheng)叶片叶绿素荧光动力学参数的日变化进行了测定,探讨其对土壤水分胁迫的响应。结果显示:量子产量(Yield)、相对光合电子传递速率(ETR)、最大量子产量(Fv/Fm)和非光化学淬灭系数(NPQ)的日变化呈单峰型,Yield、ETR和Fv/Fm值随着土壤体积含水量的降低而降低,NPQ随着土壤体积含水量的降低而增加,这意味着叶绿素荧光动力学参数可作为抗逆性评价的指标。Fv/Fm值变化量对土壤水分变化响应最为敏感,6种树种呈现沙冬青>沙柳>黄柳>掌裂草葡萄>紫穗槐>沙枣的趋势,即旱生树种对土壤水分变化最为敏感,其次是中生或湿生树种。

关键词: 防御警备, 番茄, 摩西管柄囊霉, 机械损伤

Abstract: To assess the responses of leaf chlorophyll fluorescence kinetics parameters to soil water stress, the diurnal variation of leaf chlorophyll fluorescence kinetics parameters of six sandfixation tree species (Salix psammophila C. Wang et Ch.Y. Yang, Salix gordejevii Y.L. Chang et Skv., Elaeagnus angustifolia L., Ampelopsis aconitifolia var. glabra Diels, Amorpha fruticosa L., and Ammopiptanthus mongolicus (Maxim. ex Kom.) S.H. Cheng) were determined with a portable modulated chlorophyll fluorescence spectrometer (Mini-PAM) in the growing season in 2015. The results showed that the diurnal variations of quantum yield (Yield), the apparent photosynthetic electron transport rate (ETR), the maximum photochemical efficiency of PSⅡ (Fv/Fm) and nonphotochemical quenching (NPQ) were obviously of singlepeak curve. Yield, ETR and Fv/Fm decreased with the decrease of soil water, while NPQ increased. These results indicated that the chlorophyll fluorescence kinetics parameters could be used as evaluation indicators of resistance. The response of Fv/Fm was most sensitive to the change of soil moisture. The sensitivity of Fv/Fm to soil moisture for the six tree species ranked in the order of Ammopiptanthus mongolicus > Salix psammophila > Salix gordejevii > Ampelopsis aconitifolia > Amorpha fruticose > Elaeagnus angustifolia. In conclusion, xerophilous tree species was most sensitive to soil moisture change, followed by mesophilous and hygrophilous tree species.

Key words: tomato, defense priming, Funneliformis mosseae, mechanical wounding