Unlocking phosphorus resources: phosphate-solubilizing microorganisms as a green strategy for activating phosphorus in acidic red soils and promoting crop growth

作者：Qing Ma, Huayi Chen, Yuting Yang, Bin Zhou · 发表于：Frontiers in Microbiology · 年份：2025 · DOI：10.3389/fmicb.2025.1630650 · 被引用次数：9 · 研究领域：Plant nutrient uptake and metabolism、Phytase and its Applications、Phosphorus and nutrient management

Tropical and subtropical agriculture is crucial for global food and economic crop production, and soil health directly impacts regional ecological security and food output.Red soils, widely distributed in these regions, are typical soil types formed by the longterm weathering of iron-and aluminum-rich oxides in hot and humid climates. Their red or brownish-red color results from the accumulation of iron and aluminum oxides.For instance, the red soil region in South China, covering 2.18×10 6 km² (about 36% of China's arable land), is key for economic and food crop production (Lang et al., 2025;Mao, 2014). However, due to their strong acidity, low base saturation, and high phosphorus (P) fixation capacity, red soils are among the most vulnerable soil types in agricultural production (Long et al., 2024). P is essential for plant growth and development, driving cell division, differentiation, and metabolic processes (Ashley et al., 2011). While weathering of red soil parent material releases a significant amount of P, its bioavailability is constrained by the soil's unique formation process and mineral characteristics, resulting in a low flux biogeochemical cycle of P in red soil ecosystems (Ma et al., 2016). Under acidic conditions, secondary clay minerals and amorphous iron and aluminum oxides expose numerous hydroxyl sites, which adsorb phosphate ions specifically, forming stable inner-sphere complexes. Consequently, P is fixed in soil solids as amorphous or crystalline iron-a...