<i>Paenibacillus pabuli</i> strain P7S promotes plant growth and induces anthocyanin accumulation in <i>Arabidopsis thaliana</i>

다국어 초록 (Multilingual Abstract)

<P><B>Abstract</B></P> <P>In this study, a novel plant growth-promoting rhizobacteria (PGPR), the bacterial strain <I>Paenibacillus pabuli</I> P7S (<I>PP7S</I>), showed promising plant growth-promoting effects. Furthermore, it induced anthocyanin accumulation in <I>Arabidopsis</I>. When co-cultivated with <I>PP7S</I>, there was a significant increase in anthocyanin content and biomass of <I>Arabidopsis</I> seedlings compared with those of the control. The quantitative reverse transcription-polymerase chain reaction analysis revealed higher expression of many key genes regulating anthocyanin and flavonoid biosynthesis pathways in <I>PP7S</I>-treated seedlings when compared with that of the control. Furthermore, higher expression of pathogen-related genes and microbe-associated molecular pattern genes was also observed in response to <I>PP7S</I>, indicating that the PGPR triggered the induced systemic response (ISR) in <I>A. thaliana</I>. These results suggest that <I>PP7S</I> promotes plant growth in <I>A. thaliana</I> and increases anthocyanin biosynthesis by triggering specific ISRs in plant.</P> <P><B>Highlights</B></P> <P> <UL> <LI> <I>PP7S</I> enhance growth promotion of <I>Arabidopsis thaliana</I> via cell growth promotion. </LI> <LI> <I>PP7S</I> upregulates anthocyanin biosynthesis genes expression, subsequently increase anthocyanin accumulation in <I>Arabidopsis</I>. </LI> <LI> <I>PP7S</I> trigger specific Induced Systemic Response in <I>Arabidopsis</I> plant. </LI> <LI> <I>PP7S</I> co-cultivated <I>Arabidopsis</I> plant showed better tolerance to oxidative stress cause by salt. </LI> </UL> </P>