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Root physiological and soil microbial mechanisms underlying responses to nitrogen deficiency and compensation in Indica and Japonica rice

文献类型： 外文期刊

作者： Wang, Runnan 1 ; Tang, Guoping 3 ; Lu, Yanyao 1 ; Zhang, Dingshun 1 ; Cai, Shuo 4 ; He, Haohua 5 ; Zhang, Hongcheng 1 ; Xiong, Qiangqiang 1 ;

作者机构： 1.Yangzhou Univ, Agr Coll, Jiangsu Key Lab Crop Genet & Physiol, Jiangsu Key Lab Crop Cultivat & Physiol, Yangzhou, Peoples R China

2.Yangzhou Univ, Jiangsu Coinnovat Ctr Modern Prod Technol Grain Cr, Yangzhou, Peoples R China

3.Jiangxi Acad Agr Sci, Rice Res Inst, Nanchang, Peoples R China

4.Jiangxi Irrigat Expt Cent Stn, Nanchang, Peoples R China

5.Jiangxi Agr Univ, Coll Agron, Key Lab Crop Physiol Ecol & Genet Breeding, Minist Educ, Nanchang, Peoples R China

期刊名称：PHYSIOLOGIA PLANTARUM （ 影响因子：3.6； 五年影响因子：5.4 ）

ISSN： 0031-9317

年卷期： 2024 年 176 卷 5 期

页码：

收录情况： SCI

摘要： Compensatory effects are common biological phenomena in nature. In this study, we investigated the changes in root nitrogen uptake, root morphological and physiological responses, and changes in the rhizosphere soil microbial communities of indica and japonica rice during a nitrogen deficiency-sensitive period and an effective compensation period with double the nitrogen supply. We conducted a bucket experiment using Suxiu 867 (a japonica rice variety) and Yangxian You 918 (an indica rice variety). Treatments included CK (constant distribution of nitrogen fertilizer at each growth stage, represented by CK867 and CK918) and NDC (nitrogen deficiency in the tillering stage, double nitrogen application in the ear differentiation stage to compensate, represented by NDC867 and NDC918) variations. Both varieties presented the highest delta N-15 and N-15 abundances and Ndff (refers to the proportion of nitrogen in a plant's body that comes directly from the fertilizer applied.) in rice under the NDC treatment. Metagenomic sequencing of rhizospheric soil showed that the dominant bacterial groups at the phylum level among each treatment were Actinobacteria, Proteobacteria, Chloroflexi, Acidobacteria, Gemmatimonadetes, and Nitrospirae. The rhizosphere of indica rice was more enriched with the microbial communities involved in nitrogen metabolism, which contributed to higher nitrogen utilization efficiency. A correlation-based network was constructed and provides insights into the formation of nitrogen deficiency compensation effects and contributes to the enhancement of nitrogen uptake and utilization efficiency in rice production.

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