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. 2026 Aug 3;6:1872892. doi: 10.3389/fsysb.2026.1872892

TABLE 4.

Gram staining, colony morphology and biochemical characterization of potential endophytic as well as rhizospheric isolates.

Morphological characterstics MC3 MC4 MC6 SR2 SR3 K1III K2III
Gram staining Gram (−)ve Gram (+)ve Gram (−)ve Gram (+)ve Gram (−)ve Gram (−)ve Gram (+)ve
Shape Rods Rods Rods Rods Rods Rods Rods
Colony size/shape Small circular Medium circular Medium circular Medium irregular Medium irregular Small circular Small irregular
Colony color Yellowish white Yellow White Creamy white Creamy white White Creamy white
Surface Smooth Smooth Smooth Smooth Smooth Smooth Smooth
Biochemical test MC3 MC4 MC6 SR2 SR3 K1III K2III
Glucose fermentation A A AG A AG – A
Sucrose fermentation A A AG A AG – A
Lactose fermentation A – AG – AG – –
Mannitol fermentation A A AG A AG A A
Nitrate reduction + – + – – – –
Triple sugar iron test + + + – – – –
Catalase + + + + + + +
Methyl red _ + – + – – +
Indole – – + – – – –
Voges–Proskauer + – + – + – –
Citrate utilization + + + + + + +
Oxidase – – – – – + –
Urease utilization – – + – + – –
Motility + + – + + + +

- negative, + positive, A-acid production, AG-acid and gas production.