Isolation, selection and identification of phosphorus-solubilizing and nitrogen-fixing endophytic bacteria in Ming aralia (Polyscias fruticosa L. Harms)
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Keywords

đạm
đinh lăng
lân
Polyscias fruticosa L.
vi khuẩn nội sinh endophytic bacteria
ming aralia
nitrogen
phosphorus
Polyscias fruticosa L. Harms

Abstract

This study aimed to determine phosphorus-solubilizing and nitrogen-fixing endophytic bacteria from Ming aralia. Thirteen leaf and 11 root samples collected in Tri Ton district, An Giang province, were used for isolating endophytic bacteria on the LGI medium. Thirty-five strains were isolated from Ming aralia. All isolates are resistant to pH 5. Two strains have the highest phosphorus-solubilizing activity at 29.5 and 29.7 mg·L–1. Two others have the highest nitrogen-fixing ability and IAA synthesis at 23.0 and 6.87 mg·L–1. One of the strains solubilizing phosphorus and one fixing nitrogen were identified as Bacillus cereus and B. circulans by 16S rDNA sequences with complete similarity to Bacillus cereus S5 (KU927490.1) and B. circulans H170 (MH671645.1) in Genbank.

https://doi.org/10.26459/hueunijard.v131i3B.6540
PDF (Vietnamese)

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