The dynamics of apoplast phenolics in tobacco leaves following inoculation with bacteria

Frontiers in Plant Science
Con J BakerAndrey A Aver'yanov

Abstract

This study demonstrates that the accumulation of apoplastic phenolics is stimulated in planta in response to bacterial inoculation. Past studies have shown that levels of extracellular phenolics are elicited in plant cell suspensions in response to bacteria, and that tomato plants infected with viroids showed changes in apoplastic phenolics. The method described here monitored changes in apoplastic phenolics in tobacco leaves following bacterial inoculation of the same tissue. Inoculation with a saprophyte, Pseudomonas fluorescens, which does not cause visible symptoms or physical damage, was used to elicit phenolics and examine the effects of variable parameters on phenolic composition. Location of the inoculation on the leaf, position, or developmental age of the leaf on the plant, and inoculum concentration were standardized for further experiments. The patterns of phenolic change in the apoplast were compared for tobacco inoculated with P. syringae pathovars, pv. syringae, which causes a resistant HR reaction within 15 h, and pv. tabaci, which causes a susceptible reaction with delayed visible symptoms. Both pathogens elicited lower increased levels of acetosyringone compared to the saprophyte, P. fluorescens but had greatl...Continue Reading

References

Dec 6, 2001·Protoplasma·P P BolwellP Wojtaszek
Jan 27, 2005·Biochemical and Biophysical Research Communications·C Jacyn BakerAndrey A Aver'yanov
May 13, 2010·Molecular Plant-microbe Interactions : MPMI·Hye-Sook OhAlan Collmer
Jun 19, 2013·Critical Reviews in Food Science and Nutrition·Rohit Upadhyay, L Jagan Mohan Rao

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