OCCURRENCE OF HYDROXAMATE SIDEROPHORE IRON CHELATORS IN SOILS
OCCURRENCE OF HYDROXAMATE SIDEROPHORE IRON CHELATORS IN SOILS
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DOI：
10.1038/287833a0
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发表时间：
1980-01-01
期刊：
影响因子：
64.8
通讯作者：
SZANISZLO, PJ
中科院分区：
文献类型：
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作者：
POWELL, PE;CLINE, GR;SZANISZLO, PJ
虽然铁在土壤中含量丰富（1 - 6%），但由于其溶解度取决于pH值，并受氧化铁的低溶解度控制，因此植物通常无法利用铁。因此，植物根系的铁可用性可能取决于有机螯合剂。羟肟酸铁载体（HS），微生物产生的，铁特异性，铁运输分子的稳定常数高达1032，可能代表螯合剂，维持这些土壤铁浓度。HS被发现在各种土壤的水提取物中的浓度（10 - 7 M-10 - 8 M后校正到10%的土壤水分）足以影响植物营养。
Although Fe is abundant in soils (1-6%), it is often unavailable to plants because its solubility is dependent on pH and controlled by the low solubility of ferric oxides. Fe availability to plant roots may thus depend on organic chelators. Hydroxamate siderophores (HS), microbially produced, ferric-specific, Fe transport molecules with stability constants as high as 1032, may represent the chelators which maintain these soil Fe concentrations. HS were found in aqueous extracts of a variety of soils in concentrations (10-7 M-10-8 M after correction to 10% soil moisture) sufficient to affect plant nutrition.