ArticleAnalytical and bioanalytical chemistry2026
Differentiation of wild-type and PAP1-overexpressing tobacco by volatile organic compound profiling using TP-SESI mass spectrometry.
Article in Analytical and bioanalytical chemistry, 2026. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Not yet cited in PubMed.
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Abstract
Real-time profiling of plant volatiles provides insight into metabolic regulation, yet rapid and high-throughput characterization remains analytically challenging. Here, we apply temperature programming secondary electrospray ionization (TP-SESI) mass spectrometry to compare volatile organic compound (VOC) profiles from wild-type and PAP1-overexpressing tobacco (Nicotiana tabacum). This study extends the application of TP-SESI, which was originally developed for plant volatile analysis, to evaluate genotype-specific metabolic differences. TP-SESI enabled sensitive detection of VOCs and semi-volatile compounds spanning three major plant volatile classes: terpenoids, phenylpropanoids/benzenoids, and fatty acid derivatives, across both genotypes. While the two genotypes shared many detected features, PAP1-overexpressing plants were associated with upregulation of these indicated VOCs, suggesting broad metabolic reprogramming associated with PAP1 activation. Statistical analyses revealed clear separation between genotypes, demonstrating TP-SESI captures robust, reproducible metabolic differences in intact plant tissue. These results suggest that TP-SESI is capable of detecting genotype-associated variations in plant volatile emissions and may be useful for examining transcription factor-related changes in plant metabolism.
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