›› 2016, Vol. 28 ›› Issue (11): 1867-1873.DOI: 10.3969/j.issn.1004-1524.2016.11.10

• Horticultural Science • Previous Articles     Next Articles

Comparison of light-use and water-use efficiency for C3 and C4 species

YE Zi-piao1, YANG Xiao-long1, KANG Hua-jing2   

  1. 1. Maths & Physics College, Jinggangshan University, Ji’an 343009, China;
    2. Wenzhou Vocational College of Science & Technology, Wenzhou 325006, China
  • Received:2016-03-16 Online:2016-11-15 Published:2016-11-16

Abstract: This study aims to investigate the response relationship between light-use efficiency (LUE), water-use efficiency (WUE) and light intensity for C3 and C4 plants species. It is an important significance to reveal light-use and water consume of plants. We used LI-6400 Portable Photosynthetic System to measure the leaf gas exchange data of Koelreuteria paniculata, Capsicum annuum, Sorghum bicolor and Zea mays. Then these data were simulated by a light-response model of LUE and WUE which were developed by a mechanistic model of light-response of photosynthesis. These results showed that: (1) the maximum light-use efficiency (LUEmax), maximum water-use efficiency (WUEmax) and the corresponding saturation irradiance (IL-sat for LUEmax) of K. paniculata and C. annuum were less than that of Z. mays and S. bicolor; (2) the maximum net photosynthetic rate (Pnmax) and saturation irradiance (Isat for Pnmax) of S. bicolor were less than that of Z. mays, but its LUEmax and WUEmax were more than that of Z. mays. Therefore, LUEmax and WUEmax of K. paniculata and C. annuum for C3 plants are less than that of S. bicolor and Z. mays for C4 plants. However, there is no such tendency in their corresponding saturation irradiances (i.e. IL-sat and IW-sat) for four plants.

Key words: C3 plant, C4 plant, light-use efficiency, water-use efficiency

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