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Biochar affects taxonomic and functional community composition of protists
Biology and Fertility of Soils ( IF 6.5 ) Pub Date : 2020-08-17 , DOI: 10.1007/s00374-020-01502-8
Rasit Asiloglu , Solomon Oloruntoba Samuel , Bahar Sevilir , Muhittin Onur Akca , Pinar Acar Bozkurt , Kazuki Suzuki , Jun Murase , Oguz Can Turgay , Naoki Harada

Biochar-induced changes in microbial communities are exclusively derived from the studies on the soil bacterial and fungal communities, and we lack an understanding of how biochar can affect taxonomic and functional communities of protists. Here, the short-term effects of two biochars originating from rice husk and poultry litter (hereinafter referred to as RH and PL, respectively) on taxonomic and functional community compositions of protists in a rice rhizosphere were studied using high-throughput sequencing. Soil physicochemical properties were differentially affected by the RH and PL amendments. The relative abundance of Stramenopiles , mainly oomycetes ( Peronosporomycetes ), was increased in the RH-amended soil, which was correlated with the increased total pore volume and C/N ratio. In the PL amended soil, the relative abundances of Amoebozoa , Alveolata , and Excavata were increased, and those increases were correlated with the enhanced pH and nutrient conditions. Among functional groups, the relative abundance of phagotrophic protists increased by the PL amendment, while the relative abundance of plant pathogens was decreased by both the RH and PL amendments. Network analysis indicated that phagotrophs were the keystone group and were sensitive to the biochar amendments. The keystone taxa in each biochar treatment were different: Cercozoa ( Rhizaria ) in control, Conosa ( Amoebozoa ) in RH, and Discoba ( Excavata ) in PL. The impact of biochar on protist communities correlated with its physicochemical properties, which depends on the source material.

中文翻译:

Biochar 影响原生生物的分类和功能群落组成

生物炭引起的微生物群落变化完全来自对土壤细菌和真菌群落的研究,我们对生物炭如何影响原生生物的分类和功能群落缺乏了解。在这里,使用高通量测序研究了源自稻壳和家禽凋落物的两种生物炭(以下分别称为 RH 和 PL)对水稻根际原生生物分类和功能群落组成的短期影响。土壤理化性质受 RH 和 PL 修正的不同影响。Stramenopiles,主要是卵菌(Peronosporomycetes)的相对丰度在RH改良土壤中增加,这与总孔隙体积和C/N比增加有关。在 PL 修正的土壤中,Amoebozoa、Alveolata 和 Excavata 的相对丰度增加,这些增加与增强的 pH 值和营养条件相关。在功能组中,PL 修正增加了吞噬性原生生物的相对丰度,而 RH 和 PL 修正降低了植物病原体的相对丰度。网络分析表明吞噬菌是关键组并且对生物炭修正敏感。每种生物炭处理的关键分类群是不同的:对照中的尾蚴(根瘤菌),RH 中的蒺藜(变形虫)和 PL 中的 Discoba(Excavata)。biochar 对原生生物群落的影响与其理化特性相关,这取决于源材料。这些增加与增强的 pH 值和营养条件相关。在功能组中,PL 修正增加了吞噬性原生生物的相对丰度,而 RH 和 PL 修正降低了植物病原体的相对丰度。网络分析表明吞噬菌是关键组并且对生物炭修正敏感。每种生物炭处理的关键分类群是不同的:对照中的尾蚴(根瘤菌),RH 中的蒺藜(变形虫)和 PL 中的 Discoba(Excavata)。biochar 对原生生物群落的影响与其理化特性相关,这取决于源材料。这些增加与增强的 pH 值和营养条件相关。在功能组中,PL 修正增加了吞噬性原生生物的相对丰度,而 RH 和 PL 修正降低了植物病原体的相对丰度。网络分析表明吞噬菌是关键组并且对生物炭修正敏感。每种生物炭处理的关键分类群是不同的:对照中的尾蚴(根瘤菌),RH 中的蒺藜(变形虫)和 PL 中的 Discoba(Excavata)。biochar 对原生生物群落的影响与其理化特性相关,这取决于源材料。而植物病原体的相对丰度因 RH 和 PL 修正而降低。网络分析表明吞噬菌是关键组并且对生物炭修正敏感。每种生物炭处理的关键分类群是不同的:对照中的尾蚴(根瘤菌),RH 中的蒺藜(变形虫)和 PL 中的 Discoba(Excavata)。biochar 对原生生物群落的影响与其理化特性相关,这取决于源材料。而植物病原体的相对丰度因 RH 和 PL 修正而降低。网络分析表明吞噬菌是关键组并且对生物炭修正敏感。每个生物炭处理中的关键分类群是不同的:对照中的尾蚴(Rhizaria),RH中的Conosa(变形虫)和PL中的Discoba(Excavata)。biochar 对原生生物群落的影响与其理化特性相关,这取决于源材料。
更新日期:2020-08-17
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