Aspergillus niger Enhances Organic and Inorganic Phosphorus Release from Wheat Straw by Secretion of Degrading Enzymes and Oxalic Acid.
Aspergillus niger Enhances Organic and Inorganic Phosphorus Release from Wheat Straw by Secretion of Degrading Enzymes and Oxalic Acid.
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DOI：
10.1021/acs.jafc.2c03063
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发表时间：
2022-08
影响因子：
6.1
通讯作者：
Liyan Wang;H. Guan;Jun Hu;Yi Feng;Xiang Li-;Kianpoor Kalkhajeh Yusef;Hongjian Gao;D. Tian
中科院分区：
文献类型：
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作者：
Liyan Wang;H. Guan;Jun Hu;Yi Feng;Xiang Li-;Kianpoor Kalkhajeh Yusef;Hongjian Gao;D. Tian
为探讨溶磷真菌（PSF）降解农作物秸秆和释放磷的机理，以一株典型的PSF尼日尔（A。尼日尔，ANG）降解小麦秸秆（WST）。结果表明，A.黑尼日尔显著提高了小麦秸秆的降解率（30%）。尼日尔治疗（7.7%）。同时，A.尼日尔，显著高于WST处理（69.5%）。虽然WST和WST + ANG处理的无机磷释放率相似（17.6vs19.7%），但它们的有机磷释放率之间存在显著差异，即，WST（51.9%）vs WST + ANG（72.5%）。A. β-1，4-葡聚糖酶和β-葡萄糖苷酶的高酶活。尼日尔对小麦秸秆的降解和有机磷的释放有促进作用。尼日尔待遇草酸是由A.尼日尔对WST无机磷的释放起主导作用。我们的研究结果表明，A.尼日尔是一种高效的秸秆降解和磷释放微生物菌剂，可作为秸秆还田的候选微生物菌剂。
To explore the mechanisms of crop straw degradation and phosphorus (P) release by phosphate-solubilizing fungi (PSF), a typical PSF Aspergillus niger (A. niger, ANG) was investigated for the degradation of wheat straw (WST) in this work. The results revealed that A. niger significantly increased wheat straw degradation (30%) compared with no A. niger treatment (7.7%). Meanwhile, more than 92% of total P was released from WST by A. niger, much higher than from WST treatment (69.5%). Although the ratios of inorganic P release between WST and WST + ANG treatments were similar (17.6 vs 19.7%), a significant difference occurred between their release of organic P, i.e., WST (51.9%) vs WST + ANG (72.5%). The high enzyme activity of β-1,4-glucanase and β-glucosidase produced by A. niger contributed to the wheat straw degradation and organic P release compared with no A. niger treatment. Oxalic acid secreted by A. niger dominated the release of inorganic P from WST. Our findings suggested that A. niger is an efficient microbial agent for crop straw degradation and P release, which could be a candidate in the pathway of straw return.