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

doi:10.1016/S2095-3119(13)60665-6

Journal of Integrative Agriculture ›› 2014, Vol. 13 ›› Issue (8): 1680-1690.DOI: 10.1016/S2095-3119(13)60665-6

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

ZHANG Ying-hua, SUN Na-na, HONG Jia-pei, ZHANG Qi, WANG Chao, XUE Qing-wu, ZHOU Shun-li, HUANG Qin , WANG Zhi-min

1、Key Laboratory of Farming System, Ministry of Agriculture/College of Agronomy and Biotechnology, China Agricultural University, Beijing
100193, P.R.China
2、Texas AgriLife Research, Amarillo TX 79106, USA

收稿日期:2013-06-21 出版日期:2014-08-01 发布日期:2014-08-02
通讯作者: WANG Zhi-min, Tel: +86-10-62732557, Fax: +86-10-62731298, E-mail: zhimin206@263.net
基金资助:
This work was supported by the Special Fund for Agro- scientific Research in the Public Interest in China (201303133, 201203031), the Key Technologies R&D Program of China during the 12th Five-Year Plan period (2011BAD16B14), the Construction of Modern Agricultural Industrial Technology System, Ministry of Agriculture, China, and the Beijing Higher Education Young Elite Teacher Project, China (YETP0300).

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

ZHANG Ying-hua, SUN Na-na, HONG Jia-pei, ZHANG Qi, WANG Chao, XUE Qing-wu, ZHOU Shun-li, HUANG Qin , WANG Zhi-min

1、Key Laboratory of Farming System, Ministry of Agriculture/College of Agronomy and Biotechnology, China Agricultural University, Beijing
100193, P.R.China
2、Texas AgriLife Research, Amarillo TX 79106, USA

Received:2013-06-21 Online:2014-08-01 Published:2014-08-02
Contact: WANG Zhi-min, Tel: +86-10-62732557, Fax: +86-10-62731298, E-mail: zhimin206@263.net
Supported by:
This work was supported by the Special Fund for Agro- scientific Research in the Public Interest in China (201303133, 201203031), the Key Technologies R&D Program of China during the 12th Five-Year Plan period (2011BAD16B14), the Construction of Modern Agricultural Industrial Technology System, Ministry of Agriculture, China, and the Beijing Higher Education Young Elite Teacher Project, China (YETP0300).

摘要/Abstract

摘要： 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 (Pn) of flag leaf in source limited cultivar, but had no significant effect on sink limited cultivar. The SR treatment decreased the Pn 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.

关键词: genotypic variation , remobilization of pre-anthesis dry mass and nitrogen , source-sink treatment , wheat

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 (Pn) of flag leaf in source limited cultivar, but had no significant effect on sink limited cultivar. The SR treatment decreased the Pn 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.

Key words: genotypic variation , remobilization of pre-anthesis dry mass and nitrogen , source-sink treatment , wheat

ZHANG Ying-hua, SUN Na-na, HONG Jia-pei, ZHANG Qi, WANG Chao, XUE Qing-wu, ZHOU Shun-li, HUANG Qin , WANG Zhi-min. Effect of Source-Sink Manipulation on Photosynthetic Characteristics of Flag Leaf and the Remobilization of Dry Mass and Nitrogen in Vegetative Organs of Wheat[J]. Journal of Integrative Agriculture, 2014, 13(8): 1680-1690.

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

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

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