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Bacillus spp. Mediated Growth Enhancement and Antioxidative Defence Activation in Peppermint (Mentha piperita L.).

PubMed · 2026-05-28

Soil bacteria naturally found near peppermint roots—especially Bacillus subtilis—can significantly boost the plant's growth, stress defenses, and essential oil production without synthetic fertilizers.

1

Bacillus subtilis increased peppermint chlorophyll content by 64.71% over untreated controls

2

B. subtilis treatment raised the stress-protective compound proline by 43.17% and the antioxidant enzyme catalase by 56.33%

3

All five Bacillus strains tested produced plant-growth-promoting compounds including indole acetic acid, siderophores, and ammonia, but B. subtilis showed the broadest and strongest overall effect

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