Pectin methylesterases: cell wall enzymes with important roles in plant physiology.

By F. Micheli. Trends in Plant Science, 2001

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Pectin methylesterase NaPME1 contributes to the emission of methanol during insect herbivory and to the elicitation of defence responses in Nicotiana attenuata (2009, positive): “However, PME activity can also contribute to cell wall loosening and degradation by promoting the activity of cell wall hydrolases such as endopolygalacturonases (Micheli, 2001; Willats et al., 2001).”
Gibberellin Biosynthesis and Response during Arabidopsis Seed Germination Online version contains Web-only data. Article, publication date, and citation information can be found at www.plantcell.org/cgi/doi/10.1105/tpc.011650. (2003, background): “Polar auxin transport is controlled by auxin influx and efflux carriers, which pump auxin into and out of cells, respectively (Muday and DeLong, 2001).”
Cell Wall Modifying Proteins Mediate Plant Acclimatization to Biotic and Abiotic Stresses (2011, background): “The type of PME activity is thought to be determined by cell wall properties such as the extent of pectin methylesterification and the pH (Micheli, 2001).”
The Ins and Outs of Nondestructive Cell-to-Cell and Systemic Movement of Plant Viruses (2004, positive): “The enzymatic activity of PME modulates pH and ion balance and alters cell wall porosity (e.g., Nairn et al., 1998; Pressey, 1984), affecting many aspects of plant growth and development (reviewed by Micheli, 2001) and plant response to pathogen attack (Markovic and Jornvall, 1986).”