Received: 15-08-2023
Accepted: 25-12-2023
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Isolation and characterization of Talaromyces spp. capable of dissolving insoluble potassium
,
Nguyen Thi Thu
,
Vu Hien Anh
,
Pham Hong Hien
,
Nguyen Xuan Canh
Keywords
Talaromyces funiculosus, potassium solubilization
Abstract
This study aimed to isolate and characterize some specific biological traits of Talaromycesspp. Capable of dissolving insoluble potassium. Five fungal strains with morphological features resembling Talaromyces were isolated from 10 soil samples collected in Ha Noi and Thai Binh provinces. Using selective Aleksandrov medium, three strains NM1, NM2, and TB were identified as having the capability to decompose insoluble potassium. Based on the morphological characteristics and the sequence analysis of the ITS region, the strains NM1, NM2 and TB were determined to be closely related to Talaromyces funiculosusspecies. Study on the effects of time and pH on the potassium solubilization ability of three fungal strains showed that the solubility index (SI) was highest on the fifth day of culture ranging from 2.26-2.33 and the SI was the highest at pH 6, ranging from 2.22-2.56. Additionally, the results also showed that all three fungal strains NM1, NM2, and TB had the ability to solubilize insoluble phosphate and synthesize siderophores.
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