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

abstract

  • 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

  • Journal of Integrative Agriculture

author list (cited authors)

  • ZHANG, Y., SUN, N., HONG, J., ZHANG, Q. i., WANG, C., XUE, Q., ... WANG, Z.

citation count

  • 16

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