Effect of Source-Sink Manipulation on Photosynthetic Characteristics of Flag Leaf and the Remobilization of Dry Mass and Nitrogen in Vegetative Organs of Wheat Academic Article uri icon


  • The photosynthetic characteristics of flag leaf and the accumulation and remobilization of pre-anthesis dry mass (DM) and nitrogen (N) in vegetable organs in nine wheat cultivars under different source-sink manipulation treatments including defoliation (DF), spike shading (SS) and half spikelets removal (SR) were investigated. Results showed that the SS treatment increased the photosynthetic rate (P n ) of flag leaf in source limited cultivar, but had no significant effect on sink limited cultivar. The SR treatment decreased the P n of flag leaf. Grain DM accumulation was limited by source in some cultivars, in other cultivars, it was limited by sink. Grain N accumulation was mainly limited by source supply. The contribution of pre-anthesis dry mass to grain yield from high to low was stem, leaf and chaff, while the contribution of pre-anthesis N to grain N from high to low was leaf, stem and chaff. Cultivars S7221 and TA9818 can increase the contribution of remobilization of DM and N to grain at the maximum ratio under reducing source treatments, which may be the major reason for these cultivars having lower decrease in grain yield and N content under reducing source treatments. 2014 Chinese Academy of Agricultural Sciences.

published proceedings


author list (cited authors)

  • Zhang, Y., Sun, N., Hong, J., Zhang, Q. i., Wang, C., Xue, Q., ... Wang, Z.

citation count

  • 18

complete list of authors

  • Zhang, Ying-hua||Sun, Na-na||Hong, Jia-pei||Zhang, Qi||Wang, Chao||Xue, Qing-wu||Zhou, Shun-li||Huang, Qin||Wang, Zhi-min

publication date

  • August 2014