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Seed biopriming with Bacillus nematocida enhances drought tolerance in maize via regulation of stress-responsive genes

Article scientifique 2025 Anglais

Résumé

Maize (Zea mays L.), a globally important cereal, is highly vulnerable to climate-induced drought stress. This study evaluated seed biopriming with Bacillus nematocida as a strategy to enhance drought tolerance through molecular reprogramming. Maize seeds were bioprimed and subjected to drought stress under greenhouse conditions, and the expression of twelve drought-responsive genes was analyzed via RT-qPCR. Biopriming strongly upregulated stress-related genes, including PLD (60-fold), PYL1 (63-fold), SLAH1 (11-fold), and OST1 (7-fold) under combined drought + biopriming, while Peroxidase and ZmPP2CA were markedly suppressed. These transcriptional shifts indicate enhanced ABA signaling, ion homeostasis, and reduced oxidative stress load. Overall, Bacillus nematocida biopriming conferred a > 50-fold activation of key drought regulators, highlighting its potential as a sustainable approach to improve maize resilience under water-limited conditions.

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Mohamed, N., Mohamed, N., Mokhtar, A., Khaled, Y., Mohamed, N., Mohamed, N., Mahmoud, A. (2025). Seed biopriming with Bacillus nematocida enhances drought tolerance in maize via regulation of stress-responsive genes. https://doi.org/10.1038/s41598-025-29329-z

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Auteur(s)

Nermin G. Mohamed Nermin G. Mohamed A. M. Mokhtar Youmna Khaled Nada Mohamed Nada M. Mohamed Alaa Mahmoud

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