籼稻和粳稻对氮素缺乏和补偿反应的根系生理和土壤微生物机制。

IF 5.4 2区 生物学 Q1 PLANT SCIENCES Physiologia plantarum Pub Date : 2024-09-01 DOI:10.1111/ppl.14549
Runnan Wang, Guoping Tang, Yanyao Lu, Dingshun Zhang, Shuo Cai, Haohua He, Hongcheng Zhang, Qiangqiang Xiong
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引用次数: 0

摘要

补偿效应是自然界常见的生物现象。本研究考察了籼稻和粳稻在缺氮敏感期和双倍氮素供应的有效补偿期根系氮素吸收、根系形态和生理反应的变化,以及根圈土壤微生物群落的变化。我们使用苏秀 867(粳稻品种)和扬籼优 918(籼稻品种)进行了水桶实验。处理包括 CK(在每个生长阶段恒定分配氮肥,以 CK867 和 CK918 为代表)和 NDC(分蘖期缺氮,在穗分化期加倍施氮进行补偿,以 NDC867 和 NDC918 为代表)变化。这两个品种的水稻在 NDC 处理下的δ15N 和 15N 丰度以及 Ndff(指植物体内直接来自所施肥料的氮的比例)都是最高的。根瘤土壤的元基因组测序结果表明,在各处理中,门级的优势细菌群分别为放线菌、蛋白质细菌、绿僵菌、酸性细菌、革马拉菌和硝化细菌。籼稻根瘤菌群中参与氮代谢的微生物群落更为丰富,从而提高了氮的利用效率。该研究构建了一个基于相关性的网络,有助于深入了解缺氮补偿效应的形成,并有助于提高水稻生产中的氮吸收和利用效率。
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Root physiological and soil microbial mechanisms underlying responses to nitrogen deficiency and compensation in Indica and Japonica rice.

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 δ15N and 15N 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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来源期刊
Physiologia plantarum
Physiologia plantarum 生物-植物科学
CiteScore
11.00
自引率
3.10%
发文量
224
审稿时长
3.9 months
期刊介绍: Physiologia Plantarum is an international journal committed to publishing the best full-length original research papers that advance our understanding of primary mechanisms of plant development, growth and productivity as well as plant interactions with the biotic and abiotic environment. All organisational levels of experimental plant biology – from molecular and cell biology, biochemistry and biophysics to ecophysiology and global change biology – fall within the scope of the journal. The content is distributed between 5 main subject areas supervised by Subject Editors specialised in the respective domain: (1) biochemistry and metabolism, (2) ecophysiology, stress and adaptation, (3) uptake, transport and assimilation, (4) development, growth and differentiation, (5) photobiology and photosynthesis.
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