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<p>Global warming and anthropogenic activities have increased drought severity which poses adverse consequences for agriculture sector. An eco-friendly strategy is required to mitigate drought stress for global food security. Thus, we aimed to prevail in a mythic plant-microbe interaction by observing the synergy of functional compounds synthesized by plant growth-promoting bacteria (PGPB) to boost the maize growth under drought conditions. Bacterial isolates were screened for drought tolerance, compatibility, and growth promoting properties. Of these, <i>Pantoea agglomerans</i> BCH-1 and <i>Bacillus pseudomycoides</i> BCH-3 were identified and selected as bio-inoculants for pot experiments at 100 and 50% field capacity (FC). The effectiveness of individual and co-inoculation was observed in drought sensitive (Malka-2016) and tolerant (Sawari Kashmir) maize cultivars. Further, compounds of both bacteria were explored by GC-MS. Bio-priming manifested a notable upsurge in parameters of both maize cultivars under drought. The co-inoculation of <i>P. agglomerans</i> BCH-1 and <i>B. pseudomycoides</i> BCH-3 markedly regulate the defense system of maize compared to their individual bio-priming. The detected volatile organic compounds (VOCs) in both bacteria were tridecane, 1-hexadecene, 1-octadecene, tetradecane, pyrrolo[1,2-a] pyrazine-1,4-dione, hexahydro-3-(2-methylpropyl)-, 1- docosene, hexadecanoic acid, methyl ester, and tetradecanoic acid, found effective for growth promotion and drought tolerance. Our findings provide insight into plant-microbe interaction. The resultant microbial VOCs act as signaling molecules to activate series of metabolic pathways for better maize growth. Besides these, a few others were also detected by GC-MS that have not yet been reported earlier and could act as potent stimulators for plant growth.</p>

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Exploring Synergistic Effects of Pantoea agglomerans BCH-1 and Bacillus pseudomycoides BCH-3 To Enhance Maize Adaptations Under Drought Condition

  • 期刊论文

  • 发表日期：

    2025年4月21日

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  • Anam Tariq,
  • Mahwish Salman,
  • Muhammad Arslan Ashraf,
  • Shazia Anwer Bukhari,
  • Ghulam Mustafa

摘要

Global warming and anthropogenic activities have increased drought severity which poses adverse consequences for agriculture sector. An eco-friendly strategy is required to mitigate drought stress for global food security. Thus, we aimed to prevail in a mythic plant-microbe interaction by observing the synergy of functional compounds synthesized by plant growth-promoting bacteria (PGPB) to boost the maize growth under drought conditions. Bacterial isolates were screened for drought tolerance, compatibility, and growth promoting properties. Of these, Pantoea agglomerans BCH-1 and Bacillus pseudomycoides BCH-3 were identified and selected as bio-inoculants for pot experiments at 100 and 50% field capacity (FC). The effectiveness of individual and co-inoculation was observed in drought sensitive (Malka-2016) and tolerant (Sawari Kashmir) maize cultivars. Further, compounds of both bacteria were explored by GC-MS. Bio-priming manifested a notable upsurge in parameters of both maize cultivars under drought. The co-inoculation of P. agglomerans BCH-1 and B. pseudomycoides BCH-3 markedly regulate the defense system of maize compared to their individual bio-priming. The detected volatile organic compounds (VOCs) in both bacteria were tridecane, 1-hexadecene, 1-octadecene, tetradecane, pyrrolo[1,2-a] pyrazine-1,4-dione, hexahydro-3-(2-methylpropyl)-, 1- docosene, hexadecanoic acid, methyl ester, and tetradecanoic acid, found effective for growth promotion and drought tolerance. Our findings provide insight into plant-microbe interaction. The resultant microbial VOCs act as signaling molecules to activate series of metabolic pathways for better maize growth. Besides these, a few others were also detected by GC-MS that have not yet been reported earlier and could act as potent stimulators for plant growth.