文献类型： 外文期刊

作者： Wang, Xiao-Ling ¹ ; Duan, Pei-Ling ² ; Sun, Run-Hong ³ ; Qi, Lin ¹ ; Shi, Jiang ¹ ; Li, Xue-Lin ¹ ; Zhang, Li-Xia ¹ ;

作者机构： 1.Henan Univ Sci & Technol, Coll Agron, Luoyang 471003, Henan, Peoples R China

2.Zhengzhou Railway Vocat & Tech Coll, Coll Pharm, Zhengzhou 451460, Henan, Peoples R China

3.Henan Acad Agr Sci, Coll Inst Plant Protect Res, Henan Key Lab Control Crop Dis & Insect Pests, IPM Key Lab Southern Part North China,Minist Agr, Zhengzhou 450002, Henan, Peoples R China

关键词： Soil nitrification; Corn; Compensatory growth; Cytokinin; Seedling stage; Rewatering upon drought stress

期刊名称：INTERNATIONAL JOURNAL OF AGRICULTURE AND BIOLOGY （ 影响因子：0.822； 五年影响因子：0.906 ）

ISSN： 1560-8530

年卷期： 2020 年 23 卷 5 期

页码：

收录情况： SCI

摘要： This study aimed to investigate the effect of soil nitrification on corn (Zea mays L.) compensatory growth of post-drought rewatering (CGPDR) based on root-induced leaf cytokinin. Potted corn seedlings were used as test materials. The nitrification inhibitor 3, 4-dimethylpyrazole phosphate (DMPP) was added to soil to inhibit soil nitrification. The experiment consisted of four treatments: (1) wetness, (2) wetness with DMPP addition, (3) rewatering and (4) rewatering with DMPP addition. Results indicated that drought stress and DMPP addition to soil decreased the aboveground and total biomasses and the net photosynthetic rates of corn. Without DMPP added, the aboveground and total biomasses and net photosynthetic rates in rewatered corns were significantly higher than those in wet corns during the rewatering period. As a consequence, the CGPDR occurred. However, rewatering could not increase the aboveground and total biomasses and the net photosynthetic rates when DMPP was added, and the CGPDR did not occur. The DMPP addition to soil reduced the soil nitrification rate and the decreased zeatin riboside (ZR) concentrations in the leaf and xylem sap. Without DMPP added, the increased soil nitrification rate caused by rewatering improved the ZR concentrations in the leaf and xylem sap. No significant differences were found on soil nitrate contents amongst wet and rewatered corns without DMPP added during drought stress and rewatering periods. A high leaf cytokinin concentration caused an increase in the corn net photosynthetic rate and induced rapid growth. Therefore, soil nitrification was a key soil environmental factor regulating the CGPDR. (C) 2020 Friends Science Publishers