Photosynthetica

, Volume 46, Issue 2, pp 318–320

Elevated CO2 concentration enhances the role of the ear to the flag leaf in determining grain yield of wheat

  • C. -W. Zhu
  • J. -G. Zhu
  • G. Liu
  • Q. Zeng
  • Z. -B. Xie
  • J. Pang
  • Z. -Z. Feng
  • H. -Y. Tang
  • L. Wang
Brief Communication

DOI: 10.1007/s11099-008-0059-z

Cite this article as:
Zhu, C.W., Zhu, J.G., Liu, G. et al. Photosynthetica (2008) 46: 318. doi:10.1007/s11099-008-0059-z

Abstract

Net photosynthetic rate (PN) of ear and flag leaf during grain filling stage and grain yield of plants with non-darkened or darkened flag leaf or darkened ear were examined in two different CO2 concentrations: ambient (AC) and AC+200 µmol mol−1 (EC). Ear showed much higher enhancement (56 %) of PN than flag leaf (23 %) under EC. Moreover, CO2 enrichment shortened the photosynthetic duration of flag leaf relative to ear. In this way the ratio of ear to flag leaf contribution to grain yield increased from 1.18 (AC) to 1.39 (EC).

Additional key words

net photosynthetic rateTriticum aestivum

Abbreviations

DAG

days after grain filling

FACE

free-air CO2 enrichment

PN

net photosynthetic rate

Copyright information

© Institute of Experimental Botany, ASCR, Praha 2008

Authors and Affiliations

  • C. -W. Zhu
    • 1
  • J. -G. Zhu
    • 1
  • G. Liu
    • 1
  • Q. Zeng
    • 1
  • Z. -B. Xie
    • 1
  • J. Pang
    • 2
  • Z. -Z. Feng
    • 2
  • H. -Y. Tang
    • 1
  • L. Wang
    • 1
  1. 1.State Key Laboratory of Soil and Sustainable Agriculture, Institute of Soil ScienceChinese Academy of SciencesNanjingP.R. China
  2. 2.Department of Global Agricultural Sciences, Graduate School of Agricultural and Life SciencesThe University of TokyoTokyoJapan