Pinus radiata seedlings rhizobiome shifts in response to foliar and root phosphite application

IF 3.7 2区 农林科学 Q1 ECOLOGY European Journal of Soil Biology Pub Date : 2024-10-16 DOI:10.1016/j.ejsobi.2024.103688
Frederico Leitão , Glória Pinto , Isabel Henriques
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Abstract

Soil health is an emerging concern in agriculture and is dependent on the microbial communities in the rhizosphere (rhizobiome). Phosphite-based products are used as bio-stimulants and/or fungicides. However, there is a lack of studies evaluating the impact of these products in nurseries, especially at the level of the rhizobiome. This work aims to assess the impact of phosphite (Phi) application on the rhizobiome of Pinus radiata seedlings. Two application modes (foliar and irrigation) were compared in an experimental setup with control treatments. Gas exchange parameters were evaluated to assess plant physiological performance. Bacterial rhizobiome analysis was performed using next generation sequencing targeting the 16S rRNA gene. Results showed that Phi application did not significantly affect plant photosynthetic performance. However, Phi irrigation led to a significant decrease in rhizobiome richness and diversity compared to control. Beta diversity analysis confirmed distinct microbial communities in the irrigated group. At the genus level, several acidophilic taxa, including Burkholderia and Aciditerrimonas, were significantly enriched in phosphite-irrigated samples, while others like Mucilaginibacter were reduced. The study reveals that Phi application, especially through irrigation, alters the structure of the rhizobiome in pine seedlings, leading to a decrease in richness and bacterial diversity. These findings highlight the importance of understanding the effects of commercial products, such as phosphite. This understanding is crucial to ensure sustainable plant growth and maintain soil health.
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辐射松幼苗根生物群对叶面和根部施用亚磷酸的响应变化
土壤健康是农业领域新出现的一个问题,它取决于根瘤菌圈(根瘤生物群)中的微生物群落。亚磷酸盐类产品被用作生物刺激剂和/或杀菌剂。然而,目前还缺乏对这些产品在苗圃中的影响进行评估的研究,尤其是在根瘤生物群层面。这项研究旨在评估施用亚磷酸(Phi)对黑松幼苗根生物体的影响。在实验设置中比较了两种施用模式(叶面施肥和灌溉施肥)和对照处理。通过评估气体交换参数来评估植物的生理表现。利用针对 16S rRNA 基因的新一代测序技术对细菌根生物群进行了分析。结果表明,施用 Phi 对植物的光合作用没有明显影响。然而,与对照组相比,Phi 灌溉导致根瘤生物群的丰富度和多样性显著下降。Beta 多样性分析证实,灌溉组的微生物群落与对照组截然不同。在属的层面上,几个嗜酸类群,包括伯克霍尔德氏菌(Burkholderia)和Aciditerrimonas,在亚磷酸盐灌溉的样本中明显富集,而其他类群,如粘菌(Mucilaginibacter)则有所减少。该研究揭示了磷的应用,尤其是通过灌溉,改变了松树幼苗根瘤生物群的结构,导致丰富度和细菌多样性的降低。这些发现强调了了解亚磷酸等商业产品影响的重要性。这种了解对于确保植物可持续生长和维护土壤健康至关重要。
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来源期刊
European Journal of Soil Biology
European Journal of Soil Biology 环境科学-生态学
CiteScore
6.90
自引率
0.00%
发文量
51
审稿时长
27 days
期刊介绍: The European Journal of Soil Biology covers all aspects of soil biology which deal with microbial and faunal ecology and activity in soils, as well as natural ecosystems or biomes connected to ecological interests: biodiversity, biological conservation, adaptation, impact of global changes on soil biodiversity and ecosystem functioning and effects and fate of pollutants as influenced by soil organisms. Different levels in ecosystem structure are taken into account: individuals, populations, communities and ecosystems themselves. At each level, different disciplinary approaches are welcomed: molecular biology, genetics, ecophysiology, ecology, biogeography and landscape ecology.
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