Departamento de Biodiversidad y Biología Experimental, Facultad de Ciencias Exactas y Naturales, Universidad de Buenos Aires, Instituto de Biodiversidad y Biología Experimental y Aplicada (IBBEA) UBA-CONICET, Pabellón II, 4P Ciudad Universitaria, Intendente Güiraldes 2160, 1428, Buenos Aires, Argentina.
Departamento de Biodiversidad y Biología Experimental, Facultad de Ciencias Exactas y Naturales, Universidad de Buenos Aires, Instituto de Micología y Botánica (INMIBO) UBA-CONICET, Pabellón II, 4P Ciudad Universitaria, Intendente Güiraldes 2160, 1428, Buenos Aires, Argentina.
Microb Ecol. 2020 Jan;79(1):21-29. doi: 10.1007/s00248-019-01396-6. Epub 2019 Jun 19.
Phosphorus (P) is an essential nutrient with low bioavailability in soils for plant growth. The use of P solubilization fungi (PSF) has arisen as an eco-friendly strategy to increase this nutrient's bioavailability. The effect of PSF inoculation and its combination with P-transporting organisms (arbuscular mycorrhizal fungi, AMF) on plant growth has been previously studied. However, these studies did not evaluate the combined effect of PSF and AMF inoculation on plant growth, symbiosis, and soil quality. Therefore, the aim of this study is to assess the impact of PSF on the AMF-wheat symbiosis establishment and efficiency, considering the effect on plant growth and soil quality. We performed a greenhouse experiment with wheat under different treatments (+/-AMF: Rhizophagus irregularis; +/-PSF strains: Talaromyces flavus, T. helicus L7B, T. helicus N24, and T. diversus) and measured plant growth, AMF root colonization, symbiotic efficiency, and soil quality indicators. No interaction between PSF and R. irregularis was found in wheat growth, showcasing that their combination is not better than single inoculation. T. helicus strains did not interfere with the AMF-wheat symbiosis establishment, while T. diversus and T. flavus decreased it. The symbiotic efficiency was increased by T. flavus and T. helicus N24, and unchanged with T. helicus L7B and T. diversus inoculation. The soil quality indicators were higher with microbial co-inoculation, particularly the alkaline phosphatases parameter, showing the beneficial role of fungi in soil. This work highlights the importance of microbial interactions in the rhizosphere for crop sustainability and soil quality improvement, assessing the effects of PSF on AMF-wheat symbiosis.
磷(P)是植物生长的一种必需营养物质,但在土壤中的生物利用率较低。利用溶磷真菌(PSF)来提高这种养分的生物利用率,已成为一种环保的策略。已经研究了 PSF 接种及其与磷转运生物(丛枝菌根真菌,AMF)的组合对植物生长的影响。然而,这些研究并未评估 PSF 和 AMF 接种的组合对植物生长、共生和土壤质量的综合影响。因此,本研究旨在评估 PSF 对 AMF-小麦共生体建立和效率的影响,同时考虑对植物生长和土壤质量的影响。我们在温室条件下进行了一项小麦试验,采用不同的处理方法(+/ - AMF:Rhizophagus irregularis;+/ - PSF 菌株:Talaromyces flavus、T. helicus L7B、T. helicus N24 和 T. diversus),并测量了植物生长、AMF 根定殖、共生效率和土壤质量指标。在小麦生长方面,未发现 PSF 和 R. irregularis 之间存在相互作用,这表明它们的组合并不优于单一接种。T. helicus 菌株不会干扰 AMF-小麦共生体的建立,而 T. diversus 和 T. flavus 则会降低其建立。T. flavus 和 T. helicus N24 提高了共生效率,而 T. helicus L7B 和 T. diversus 接种则保持不变。土壤质量指标在微生物共接种时更高,特别是碱性磷酸酶参数,这表明真菌在土壤中具有有益作用。这项工作强调了微生物相互作用在根际对作物可持续性和土壤质量改善的重要性,评估了 PSF 对 AMF-小麦共生体的影响。
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