浙江农业学报

• 园艺科学 • 上一篇    下一篇

结缕草光合特征日变化及与环境因子关系的比较研究

  

  1. (1 盐城师范学院 生命科学与技术学院,江苏 盐城224051;2 江苏省中国科学院植物研究所(南京中山植物园),江苏 南京210014)
  • 出版日期:2015-06-25 发布日期:2015-06-26

Comparative study on diurnal variation of photosynthesis characteristics and environmental factors in Zoysia japonica

  1. (1 School of Life Science and Technology,Yancheng Teachers University,Yancheng 224051,China; 2 Institute of Botany,Jiangsu Province and Chinese Academy of Sciences,Nanjing Botanical Garden,Nanjing 210014,China)
  • Online:2015-06-25 Published:2015-06-26

摘要: 利用Li\|6400XT光合测定仪研究2份长期水分利用效率有显著差异的结缕草种质(Z110和Z132)的光合特征日变化及与环境因子的关系。结果表明:结缕草叶片光合速率和气孔导度呈双峰变化趋势,峰值均出现在11:00和15:00,光合速率具有明显的光合“午休”现象;胞间CO2浓度呈凹单峰变化趋势,在13:00出现低谷;蒸腾速率呈凸单峰型曲线,Z110蒸腾速率的峰值出现在12:00,而Z132的最大蒸腾速率出现在11:00;瞬间水分利用效率和潜在水分利用效率均呈不规则变化趋势。2份结缕草种质的光合特征与环境因子相关度均不相等。

关键词: 结缕草, 光合特征, 日变化, 环境因子, 关系

Abstract: Diurnal variation of photosynthesis characteristics of two germplasms (Z110 and Z132) of Zoysia japonica which had different long term water use efficiency and its mutual relationship and environmental factors were studied with Li\|6400XT photosynthesis system. The results showed that net photosynthetic rate and stomatal conductance of Zoysia japonica presented double\|peak curve,with the peaks appearing at 11:00 and 15:00,net photosynthetic rate appeared a typical phenomenon “photosynthesis midday depression”; The diurnal variation of inter\|cellular CO2 concentration presented a concave one\|peak curve in the leaves of Zoysia japonica,and the lowest peak of inter\|cellular CO2 concentration was observed at 13:00; The diurnal variation of transpiration rate presented a raised one\|peak curve in the leaves of Zoysia japonica,and the peak of Z110 and Z132was observed at 12:00 and 11:00, respectively; Momentary water use efficiency and potential water use efficiency presented irregular changes. Relationships between environmental factors and photosynthesis characteristics were not equal in two germplasms of Zoysia japonica.

Key words: Zoysia japonica, photosynthesis characteristics, diurnal variation, environmental factors, relationships