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<p>Silicon is a useful ingredient of bamboos that affects its growth and development. It is the best accumulator of silicon, but it cannot absorb it on its own so, additional bio-weathering activity of microorganisms is required. In this study, 16 different silicon solubilizing bacteria form rhizosphere and phyllo sphere of <i>Bambosa bambos</i> and <i>Dendrocalamus strictus</i> were characterized utilizing 16&#xa0;s rRNA sequence analysis as <i>Alcaligenes</i> sp. <i>Bacillus tyonansis, Bacillus cereus, Pseudomonas</i> sp., <i>Lysinibacillus fusiformis, Pseudomonas parafulva, Bacillus weidmanii, Bacillus cereus, Bacillus subtilis, Bacillus amyloliquefaciens, Bacillus pumilus, Bacillus safensis,</i> and Endophytic bacterium. The superior silicon solubilization activity was observed in <Emphasis Type="BoldItalic">Lysinibacillus fusiformi</Emphasis><i>s</i> with a solubilization index of 1.3 followed by <Emphasis Type="BoldItalic">Bacillus tyonansis</Emphasis> and <Emphasis Type="BoldItalic">Pseudomonas sp</Emphasis><i>.</i> with an index of 1 and 0.9 respectively. Antifungal activity against <i>Alternaria alternata</i> and <i>Curvularia lunata,</i> maximally shown by <Emphasis Type="BoldItalic">Alcaligenes</Emphasis><b> sp</b>. and <Emphasis Type="BoldItalic">Bacillus safensis</Emphasis>. Plant growth-promoting traits of isolates were confirmed by investigating IAA production potential and highest was recorded at 70&#xa0;µg/mL for <Emphasis Type="BoldItalic">Bacillus pumilus</Emphasis> and siderophore production, phosphate solubilization and ACC deaminase synthase activity was also reported positive. Functional enzyme activities such as protease, amylase and cellulase were reported at different potential. The gene mining studies confirm the presence of regions with antibiotics and secondary metabolites genes (Petrobactin, Beta lactone, Terpene, Lankicidine, Proverdine, Fengycin, Zwittermicin, Bacillibactin, Ectoine, Dihydroxybenzyolserine) in isolates. These findings highlight the potential of bamboo-associated bacteria as promising candidates for sustainable agriculture and could pave the way for innovative strategies in crop management and disease prevention.</p>

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Uncovering bamboo-associated silicon-solubilizing bacteria from the rhizosphere and phyllo sphere: Elevating plant development, functional enzyme synthesis, and biocontrol against Alternaria alternata and Curvularia lunata

  • 期刊论文

  • 发表日期：

    2025年6月30日

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  • Sunita Rawat,
  • Ravita Tadiya,
  • Santan Barthwal

摘要

Silicon is a useful ingredient of bamboos that affects its growth and development. It is the best accumulator of silicon, but it cannot absorb it on its own so, additional bio-weathering activity of microorganisms is required. In this study, 16 different silicon solubilizing bacteria form rhizosphere and phyllo sphere of Bambosa bambos and Dendrocalamus strictus were characterized utilizing 16 s rRNA sequence analysis as Alcaligenes sp. Bacillus tyonansis, Bacillus cereus, Pseudomonas sp., Lysinibacillus fusiformis, Pseudomonas parafulva, Bacillus weidmanii, Bacillus cereus, Bacillus subtilis, Bacillus amyloliquefaciens, Bacillus pumilus, Bacillus safensis, and Endophytic bacterium. The superior silicon solubilization activity was observed in Lysinibacillus fusiformis with a solubilization index of 1.3 followed by Bacillus tyonansis and Pseudomonas sp. with an index of 1 and 0.9 respectively. Antifungal activity against Alternaria alternata and Curvularia lunata, maximally shown by Alcaligenes sp. and Bacillus safensis. Plant growth-promoting traits of isolates were confirmed by investigating IAA production potential and highest was recorded at 70 µg/mL for Bacillus pumilus and siderophore production, phosphate solubilization and ACC deaminase synthase activity was also reported positive. Functional enzyme activities such as protease, amylase and cellulase were reported at different potential. The gene mining studies confirm the presence of regions with antibiotics and secondary metabolites genes (Petrobactin, Beta lactone, Terpene, Lankicidine, Proverdine, Fengycin, Zwittermicin, Bacillibactin, Ectoine, Dihydroxybenzyolserine) in isolates. These findings highlight the potential of bamboo-associated bacteria as promising candidates for sustainable agriculture and could pave the way for innovative strategies in crop management and disease prevention.