Soil Nutrient Enrichment Induces Trade-Offs in Bacterial Life-History Strategies Promoting Plant Productivity.

IF 14.1 1区 材料科学 Q1 CHEMISTRY, MULTIDISCIPLINARY
Yuanyuan Yan, Xing Zhou, Liangliang Liu, Zucong Cai, Josep Penuelas, Xinqi Huang
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Abstract

Despite the global prevalence of anthropogenic soil nutrient enrichment, its impacts on the trade-offs in microbial life-history strategies remain poorly understood, which is critical for agroecosystem productivity. Here, large-scale observational studies are integrated with controlled experiments to systematically evaluate how soil nutrient enrichment affects bacterial functional potential and growth-rate potential, ultimately determining microbial functions and plant productivity. These findings reveal stark contrasts between nutrient-poor open field (OF) and nutrient-rich greenhouse (GH) soils across multiple paired sites using 16S rRNA gene amplicon and metagenomic sequencing. OF microbial communities dominated by oligotrophs have higher taxonomic diversity, larger average genome sizes with abundant nutrient-cycling genes, but lower 16S ribosomal RNA gene operon copy numbers and predicted maximum growth rates. Conversely, GH communities dominated by copiotrophs have higher growth-rate potential, more plant-beneficial bacteria, and higher diversity of functional genes (e.g., biofilm formation, secondary metabolism, and bacterial chemotaxis), but lower bacterial functional potential. Controlled pot experiments demonstrate that GH-enriched microbial functions strongly promote plant growth, particularly under sufficient nutrients and abiotic stress. These findings reveal a nutrient-driven trade-off between bacterial functional potential and growth rate, with implications for optimizing nutrient management strategies in precision agriculture to enhance specific microbial functions and plant productivity.

土壤养分富集诱导细菌生活史策略的权衡促进植物生产力。
尽管全球普遍存在人为土壤养分富集,但其对微生物生活史策略权衡的影响仍然知之甚少,这对农业生态系统生产力至关重要。在这里,大规模的观察研究与对照实验相结合,系统地评估土壤养分富集如何影响细菌功能潜力和生长速率潜力,最终确定微生物功能和植物生产力。这些发现通过16S rRNA基因扩增子和宏基因组测序揭示了营养贫乏的空旷地(OF)和营养丰富的温室(GH)土壤在多个配对位点上的明显差异。以寡养生物为主的OF微生物群落具有较高的分类多样性、较大的平均基因组大小和丰富的营养循环基因,但16S核糖体RNA基因操纵子拷贝数较低,预测最大生长速率较低。相反,以共生菌为主的生长激素群落具有更高的生长速率潜力、更多的植物有益菌和更高的功能基因多样性(如生物膜形成、次生代谢和细菌趋化性),但细菌功能潜力较低。盆栽对照试验表明,在营养充足和非生物胁迫条件下,富氢微生物功能对植物生长有很强的促进作用。这些发现揭示了细菌功能潜力和生长速度之间的营养驱动权衡,这对优化精准农业中的营养管理策略以增强特定微生物功能和植物生产力具有重要意义。
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来源期刊
Advanced Science
Advanced Science CHEMISTRY, MULTIDISCIPLINARYNANOSCIENCE &-NANOSCIENCE & NANOTECHNOLOGY
CiteScore
18.90
自引率
2.60%
发文量
1602
审稿时长
1.9 months
期刊介绍: Advanced Science is a prestigious open access journal that focuses on interdisciplinary research in materials science, physics, chemistry, medical and life sciences, and engineering. The journal aims to promote cutting-edge research by employing a rigorous and impartial review process. It is committed to presenting research articles with the highest quality production standards, ensuring maximum accessibility of top scientific findings. With its vibrant and innovative publication platform, Advanced Science seeks to revolutionize the dissemination and organization of scientific knowledge.
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