Journal of Integrative Agriculture ›› 2016, Vol. 15 ›› Issue (3): 545-552.DOI: 10.1016/S2095-3119(15)61151-0

• 论文 • 上一篇    下一篇

Photosynthetic characteristics and nitrogen distribution of largespike wheat in Northwest China

 WANG Li-fang, CHEN Juan, SHANGGUAN Zhou-ping   

  1. State Key Laboratory of Soil Erosion and Dryland Farming on the Loess Plateau, Northwest A&F University, Yangling 712100, P.R.China
  • 收稿日期:2015-03-11 出版日期:2016-03-07 发布日期:2016-03-09
  • 通讯作者: SHANGGUAN Zhou-ping,Tel: +86-29-87019107, Fax: +86-29-7012210, E-mail: shangguan@ms.iswc.ac.cn
  • 作者简介:WANG Li-fang, Mobile: +86-18792689847, E-mail: wanglifang605@126.com,
  • 基金资助:

    This study was financially supported by the National Natural Science Foundation of China (31370425, 31501276) and the Key Technologies R&D Program of China during the 12th Five-Year Plan period (2015BAD22B01).

Photosynthetic characteristics and nitrogen distribution of largespike wheat in Northwest China

 WANG Li-fang, CHEN Juan, SHANGGUAN Zhou-ping   

  1. State Key Laboratory of Soil Erosion and Dryland Farming on the Loess Plateau, Northwest A&F University, Yangling 712100, P.R.China
  • Received:2015-03-11 Online:2016-03-07 Published:2016-03-09
  • Contact: SHANGGUAN Zhou-ping,Tel: +86-29-87019107, Fax: +86-29-7012210, E-mail: shangguan@ms.iswc.ac.cn
  • About author:WANG Li-fang, Mobile: +86-18792689847, E-mail: wanglifang605@126.com,
  • Supported by:

    This study was financially supported by the National Natural Science Foundation of China (31370425, 31501276) and the Key Technologies R&D Program of China during the 12th Five-Year Plan period (2015BAD22B01).

摘要: The leaf photosynthesis and nitrogen (N) translocation in three large-spike lines and control cultivar (Xi’nong 979) of winter wheat (Triticum aestivum L.) were studied in 2010–2011 and 2011–2012. The objectives of this study were to investigate the differences in the physiological characteristics of large-spike lines and control cultivar and identify the limiting factors that play a role in improving the yield of breeding materials. The average yield, grain number per spike, kernel weight per spike, and 1 000-kernel weight of the large-spike lines were 16.0, 26.8, 42.6, and 15.4%, respectively, significantly higher than those of control. The average photosynthetic rates (Pn) were not significant between the large-spike lines and control cultivar during the active growth period. The average PSII maximum energy conversion efficiency (Fv/Fm), PSII actual quantum efficiency (ФPSII), photochemical quenching coefficient (qP), PSII reaction center activity (Fv´/Fm´) and water-use efficiency (WUE) of the large-spike lines were 1.0, 5.1, 3.6, 0.8, and 43.4%, respectively, higher than those of the control during the active growth stages. The N distribution proportions in different tissues were ranked in the order of grains>culms+sheathes>rachis+ glumes>flag leaves>penultimate leaves>remain leaves. This study suggested that utilization of the large-spike wheat might be a promising approach to obtain higher grain yield in Northwest China.

关键词: wheat , nitrogen distribution , large-spike lines , photosynthetic characteristics , yield

Abstract: The leaf photosynthesis and nitrogen (N) translocation in three large-spike lines and control cultivar (Xi’nong 979) of winter wheat (Triticum aestivum L.) were studied in 2010–2011 and 2011–2012. The objectives of this study were to investigate the differences in the physiological characteristics of large-spike lines and control cultivar and identify the limiting factors that play a role in improving the yield of breeding materials. The average yield, grain number per spike, kernel weight per spike, and 1 000-kernel weight of the large-spike lines were 16.0, 26.8, 42.6, and 15.4%, respectively, significantly higher than those of control. The average photosynthetic rates (Pn) were not significant between the large-spike lines and control cultivar during the active growth period. The average PSII maximum energy conversion efficiency (Fv/Fm), PSII actual quantum efficiency (ФPSII), photochemical quenching coefficient (qP), PSII reaction center activity (Fv´/Fm´) and water-use efficiency (WUE) of the large-spike lines were 1.0, 5.1, 3.6, 0.8, and 43.4%, respectively, higher than those of the control during the active growth stages. The N distribution proportions in different tissues were ranked in the order of grains>culms+sheathes>rachis+ glumes>flag leaves>penultimate leaves>remain leaves. This study suggested that utilization of the large-spike wheat might be a promising approach to obtain higher grain yield in Northwest China.

Key words: wheat , nitrogen distribution , large-spike lines , photosynthetic characteristics , yield