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Acta Agron Sin ›› 2007, Vol. 33 ›› Issue (03): 514-517.

• RESEARCH NOTES • Previous Articles     Next Articles

Effects of Planting Density on Activities of Nitrogen Metabolism Enzymes in Flag Leaves and Grain Protein Content in Winter Wheat with Two Spike Types

MA Dong-Yun;GUO Tian-Cai*;ZH A Fei-Na;WANG Chen-Yang;ZHU Yun-Ji;WANG Yong-Hua   

  1. Henan Agricultural University / National Engineering Research Center for Wheat, Zhengzhou 450002, Henan, China
  • Received:2006-06-19 Revised:1900-01-01 Online:2007-03-12 Published:2007-03-12
  • Contact: GUO Tian-Cai

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Abstract:

Two winter wheat（Triticum aestivum L.） cultivars, Yumai 49-198 with multi-spike and Lankao Aizao 8 with large spike were used to investigate effects of planting density on the activities of enzymes related to nitrogen metabolism and grain protein content. We found that the planting density significantly affected the activities of enzymes. For both cultivars before 15 days after anthesis, the activities of glutamine synthetase (GS) and glutamate synthase (GOGAT) in flag leaves were improved with the increase of planting density, and meanwhile nitrate reductase (NR) activity in flag leaves was the lowest in middle density treatment. In a certain range, the grain protein content was enhanced with the increase of planting density for both cultivars. The results indicate that the increase of the activities of enzymes related to nitrogen metabolism benefits the accumulation of grain protein.

Key words: Planting density, Wheat, Nitrogen metabolism, Enzyme activity, Protein content

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