Abstract
Phosphate-solubilizing and phytate-mineralizing bacteria collectively termed as phosphobacteria provide a sustainable approach for managing P-deficiency in agricultural soils by supplying inexpensive phosphate to plants. A phosphobacterium Bacillus subtilis strain KPS-11 (Genbank accession no. KP006655) was isolated from potato (Solanum tuberosum L.) rhizosphere and characterized for potato plant growth promoting potential. The strain utilized both Ca-phosphate and Na-phytate in vitro and produced 6.48 μg mL(-1) indole-3-acetic acid in tryptophan supplemented medium. P-solubilization after 240 h was 66.4 μg mL(-1) alongwith the production of 19.3 μg mL(-1) gluconic acid and 5.3 μg mL(-1) malic acid. The extracellular phytase activity was higher (4.3 × 10(-10) kat mg(-1) protein) than the cell-associated phytase activity (1.6 × 10(-10) kat mg(-1) protein). B. subtilis strain KPS-11 utilized 40 carbon sources and showed resistance against 20 chemicals in GENIII micro-plate system demonstrating its metabolic potential. Phytase-encoding gene β-propeller (BPP) showed 92% amino acid similarity to BPP from B. subtilis (accession no.WP_014114128.1) and 83% structural similarity to BPP from B. subtilis (accession no 3AMR_A). Potato inoculation with B. subtilis strain KPS-11 increased the root/shoot length and root/shoot weight of potato as compared to non-inoculated control plants. Moreover, rifampicin-resistant derivative of KPS-11 were able to survive in the rhizosphere and on the roots of potato up to 60 days showing its colonization potential. The study indicates that B. subtilis strain KPS-11 can be a potential candidate for development of potato inoculum in P-deficient soils.
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Claims 3
Claim · model-written summary
B. subtilis KPS-11 increased potato root and shoot length relative to uninoculated controls.
- Taxon
- potato
Solanum tuberosume0 - Treatment
- Potato inoculation with B. subtilis strain KPS-11e0
- Interactor
- B. subtilis strain KPS-11
Bacillus subtilise0symbiont - Outcome
- root/shoot lengthe0
- Direction
- increasede0
- Comparator
- non-inoculated control plantse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Potato inoculation with B. subtilis strain KPS-11 increased the root/shoot length and root/shoot weight of potato as compared to non-inoculated control plants.”
Claim · model-written summary
B. subtilis KPS-11 increased potato root and shoot weight relative to uninoculated controls.
- Taxon
- potatoSolanum tuberosume0
- Treatment
- Potato inoculation with B. subtilis strain KPS-11e0
- Interactor
- B. subtilis strain KPS-11Bacillus subtilise0symbiont
- Outcome
- root/shoot weighte0
- Direction
- increasede0
- Comparator
- non-inoculated control plantse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Potato inoculation with B. subtilis strain KPS-11 increased the root/shoot length and root/shoot weight of potato as compared to non-inoculated control plants.”
Claim · model-written summary
The rifampicin-resistant KPS-11 derivative persisted in potato rhizosphere and on roots up to 60 days.
- Taxon
- potatoSolanum tuberosume0
- Interactor
- rifampicin-resistant derivative of KPS-11e0symbiont
- Outcome
- survive in the rhizosphere and on the roots of potatoe0
- Value
- 60 dayse0
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“rifampicin-resistant derivative of KPS-11 were able to survive in the rhizosphere and on the roots of potato up to 60 days showing its colonization potential.”
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