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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.

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

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

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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Peppermint

sustainable-growing

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