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                <term xml:lang="en">mitochondrial respiration</term>
                <term xml:lang="en">photosynthesis</term>
                <term xml:lang="en">plant immunity</term>
                <term xml:lang="en">priming</term>
                <term xml:lang="en">programmed cell death</term>
                <term xml:lang="en">maintenance protein complex</term>
                <term xml:lang="en">heat shock proteins</term>
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                <term xml:lang="en">cell cycle heat shock proteins maintenance protein complex mitochondrial respiration photosynthesis plant immunity priming programmed cell death</term>
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              <p>&lt;div&gt;&lt;p&gt;Ultraviolet C (UV-C) flash treatment represents a promising method for priming plants. This study compared the effects of 1 s (flash) and 60 s (60 s) UV-C exposures on the transcriptome of Arabidopsis thaliana L. plants. A dose of 200 J m -2 delivered in one second was observed to effectively stimulate plant defenses without causing any adverse effects on plant health. A total of 3054 and 1865 differentially expressed genes (DEGs) were identified in the flash and 60 s treatments, respectively, in comparison to the control plants. Of these, 1131 were common to both treatments. The flash treatment affected a greater number of transcription factors (415 genes) than the 60 s treatment (254 genes), indicating more pronounced alterations in gene expression. The flash treatment resulted in a significant overexpression of heat shock proteins (HSPs), heat shock factors (HSFs), and their associated genes, which impacted oxidative stress, proteostasis, genome stability, cell survival, and thermotolerance. The majority of mitochondrial genes were found to be upregulated, while photosynthetic genes exhibited a downregulation. These expression patterns coordinate electron transport and crosstalk between the nucleus, chloroplasts, and mitochondria, eliciting an adaptive protective response to UV-C flash. Additionally, the flash treatment resulted in alterations to several genes involved in cell cycle regulation, division, and DNA replication. These included ATP BMMs, BRCA2 s, IQDs, kinesin complex, MCM complex, CYCs, and CDKs, which ultimately led to cell cycle arrest as a temporary preparation for subsequent conditions. The present study demonstrates that a 1 s exposure to UV-C induces distinctive plant responses through coordinated gene expression. The findings suggest that the flash treatment is an innovative method that triggers a unique cellular response, prioritizing repair mechanisms and potentially enhancing plant immunity, resilience, and priming. It can be used as a plant resistance inducer and stimulator.&lt;/p&gt;&lt;/div&gt;</p>
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