Isolation, identification, and potential applications of endophytic bacteria from brown macroalga <i>Hormophysa triquetra</i>
<p dir="ltr">The study aimed at isolation of bacterial endophytes from brown macroalga <i>Hormophysa triquetra</i> (HT). A total of 16 endophytic strains were obtained, belonging to five genera: <i>Bacillus, Pseudomonas, Rothia, Lysinibacillus, </i>and <i&g...
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2025
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| Summary: | <p dir="ltr">The study aimed at isolation of bacterial endophytes from brown macroalga <i>Hormophysa triquetra</i> (HT). A total of 16 endophytic strains were obtained, belonging to five genera: <i>Bacillus, Pseudomonas, Rothia, Lysinibacillus, </i>and <i>Stenotrophomonas</i>. The isolates were identified based on 16S rRNA gene sequencing. Multiple assays — including hydrogen cyanide (HCN) production, phosphate solubilization, 1-aminocyclopropane-1-carboxylate (ACC) deaminase activity, indole acetic acid (IAA) production, and protease enzyme activity were conducted. Moreover, salt tolerance assays and biocontrol tests against <i>Fusarium oxysporum</i> and <i>Botrytis cinerea </i>were also achieved. The results revealed promising plant growth–promoting and stress-mitigating capabilities among the isolated endophytes with strong performance by <u>Bacillus cereus</u> (HT3), which also proved to be effective against fungal strains and showed tolerance to saline conditions. Greenhouse experiments using HT3-treated tomato seedlings further confirmed the in vitro findings. Under abiotic (salinity) and biotic (<i>F. oxysporum</i>) stressed conditions, tomato seedlings treated with HT3 exhibited healthy growth regardless of stressors’ presence. This study highlights the potential of endophytes as biofertilizers and biocontrol agents, offering a promising step toward more sustainable and resilient agricultural practices.</p><h2 dir="ltr">Other Information</h2><p dir="ltr">Published in: Biocatalysis and Agricultural Biotechnology<br>License: <a href="http://creativecommons.org/licenses/by/4.0/" target="_blank">http://creativecommons.org/licenses/by/4.0/</a><br>See article on publisher's website: <a href="https://dx.doi.org/10.1016/j.bcab.2025.103901" target="_blank">https://dx.doi.org/10.1016/j.bcab.2025.103901</a></p> |
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