Phosphorus and Potassium Solubilization From Rock Minerals by Endophytic Burkholderia sp. Strain FDN2-1 in Soil and Shift in Diversity of Bacterial Endophytes of Corn Root Tissue with Crop Growth Stage

Exploring diversity of endophytes from cultivated crop offers immense promise for plant growth promotion. Present study evaluated plant growth promoting efficiency, phosphorus, and potassium solubilization by bacterial endophytes of corn root in soil. Out of 24 endophytic isolates from four growth s...

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Published in:Geomicrobiology journal 2020-06, Vol.37 (6), p.550-563
Main Authors: Baghel, Vikas, Thakur, Jyoti Kumar, Yadav, Shashi S., Manna, Madhab Chandra, Mandal, Asit, Shirale, Abhay Omprakash, Sharma, Poonam, Sinha, Nishant K., Mohanty, Monoranjan, Singh, Amar Bahadur, Patra, Ashok K.
Format: Article
Language:English
Subjects:
Acetic acid
Aluminium
Aluminum
Aluminum phosphate
Antifungal activity
Bioactive compounds
Burkholderia
Burkholderia sp
Calcium phosphates
Corn
Crop growth
Culture media
Deoxyribonucleic acid
DNA
Dry weight
endophyte
Endophytes
Fungicides
galuconite
Glauconite
Growth stage
Incubation period
Indoleacetic acid
Inoculation
Iron phosphates
Minerals
Muscovite
PGPR
Phosphates
Phosphorus
Plant growth
Plant tissues
Potassium
Ribosomal DNA
Rock phosphate
Rocks
Seedlings
Soil
Soils
Solubilization
Tricalcium phosphate
Vegetables
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Summary:Exploring diversity of endophytes from cultivated crop offers immense promise for plant growth promotion. Present study evaluated plant growth promoting efficiency, phosphorus, and potassium solubilization by bacterial endophytes of corn root in soil. Out of 24 endophytic isolates from four growth stages, 13 isolates were able to grow on nitrogen free media, 10 could solubilize phosphorus from tricalcium phosphate, and 8 isolates possessed potassium solubilizing ability from glauconite. The isolates also showed siderophore production and antifungal activity. Two isolates FDN-4-6 and FDN2-1 produced Indole acetic acid to the extent of 18.75 µg/ml and 17.47 µg/ml, respectively. The isolate FDN2-1 phylogenticlly related to Burkholderia sp. solubilized rock phosphate (250.43 µg/ml soluble P), tricalcium phosphate (416.13 µg/ml), iron phosphate (49.53 µg/ml), aluminum phosphate (85.23 µg/ml). It could also solubilize potassium from galuconite (52.37 µg/ml soluble K) and muscovite (61.87 µg/ml) in culture broth. Seed inoculation with FDN-2-1 could improve the root length and dry weight of corn seedling. Soil amended with rock phosphate and glauconite upon inoculation of FDN2-1 showed significantly (p 
ISSN:0149-0451
1521-0529
DOI:10.1080/01490451.2020.1734691