Physiological response of flag leaf and yield formation of winter wheat under different spring restrictive irrigation regimes in the Haihe Plain,China

作     者：LIU Xue-jing YIN Bao-zhong HU Zhao-hui BAO Xiao-yuan WANG Yan-dong ZHEN Wen-chao LIU Xue-jing;YIN Bao-zhong;HU Zhao-hui;BAO Xiao-yuan;WANG Yan-dong;ZHEN Wen-chao

作者机构：College of AgronomyHebei Agricultural UniversityBaoding 071001P.R.China State Key Laboratory of North China Crop Improvement and RegulationBaoding 071001P.R.China Key Laboratory of Crop Growth Regulation of Hebei ProvinceBaoding 071001P.R.China College of Life ScienceHebei Agricultural UniversityBaoding 071001P.R.China 

出 版 物：《Journal of Integrative Agriculture》 (农业科学学报（英文版）)

年 卷 期：2021年第20卷第9期

页      面：2343-2359页

核心收录：

学科分类：09[农学] 0901[农学-作物学] 

基　　金：funded by the National Key R&D Program of China(2017YFD0300906) the National Key Technologies R&D Program of China during the 12th Five-Year Plan period(2012BAD04B06) 

主　　题：winter wheat restrictive irrigation flag leaf physiological response yield formation 

摘      要：In order to identify the optimum period of spring water-restrictive irrigation for winter wheat(Triticum aestivum L.)in the Haihe Plain,China and elucidate its effects on flag leaf senescence and yield formation,field experiments were conducted at the Xinji Experimental Station of Hebei Agricultural University from 2016 to 2019 by using different irrigation regimes in spring,including the conventional regime involving two irrigation periods(control(CK),the 3-leaf unfolding stage and the anthesis stage)and a series of single,restrictive irrigation regimes(SRI)comprising irrigation at the 3-leaf unfolding stage(3 LI),4 LI,5 LI,and 6 *** are five major findings:(1)The senescence(determined by the green leaf area,GLA)in the 4 LI treatment occurred moderately earlier than that in CK,showed no significant difference with that in 5 LI and 6 LI,and occurred significantly later than that in 3 LI.(2)Compared with other SRI treatments,the GLA value and photosynthetic rate in 4 LI were 14.82 and 20.1%higher,*** analysis of flag leaf also revealed that the mesophyll cells and chloroplasts were irregularly arranged under drought stress in 3 LI and 6 LI;however,drought stress had minimal negative effects on the microstructure in 4 LI and 5 LI.(3)Postponed irrigation in spring could significantly increase superoxide dismutase(SOD)and catalase(CAT)activities in the early stage of grain filling;however,these activities would subsequently *** the four SRI treatments,the overall enzyme activities were the highest in 4 LI,and the combined malondialdehyde(MDA)content in flag leaves in 4 LI and 5 LI was 14.5%lower on average than that in 3 LI and 6 LI.(4)The soluble sugar(SS)and proline(Pro)contents in 4 LI were the highest among the four SRI treatments;however,they were lower than those in *** abscisic acid(ABA)hormone content in 4 LI and 5 LI was lower than that in 3 LI and 6 LI,respectively,suggesting a smaller drought stress effect in 4 LI a