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Seed biopriming with Bacillus nematocida enhances drought tolerance in maize via regulation of stress-responsive genes
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Abstract
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.
Springer Science and Business Media LLC
Title: Seed biopriming with Bacillus nematocida enhances drought tolerance in maize via regulation of stress-responsive genes
Description:
Abstract
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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