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Pectin methylesterase as a factor of plant transcriptome stability
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Pectin methylesterase as a factor of plant transcriptome stability
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Journal Article
Pectin methylesterase as a factor of plant transcriptome stability
2008
Overview
Pectin methylesterase (PME) is a cell-wall enzyme that acts as a growth and morphogenesis factor in higher plants and is involved in gene silencing, plant virus reproduction, and transgenesis. A study was made of the role of PME as a stress protein in host plant-virus interactions. PME enzymatic activity was induced, not only by an additional PME gene copy, but also by an empty vector. PME suppressed tobacco mosaic virus (TMV) reproduction, including short-and long-distance virus movement in plants. Surprisingly, elevated PME activity was observed in intact stably transformed transgenic plants. For example, PME activity was increased in transgenic
Nicotiana tabacum
and
N. benthamiana
plants expressing the genes for the TMV movement protein and GFP and in tomato plants with cosuppression of the polygalacturonase gene. Activation of light-inducible
psb
O induced transcription of the PME gene. It was suggested that PME is involved in maintaining the stability of the plant transcriptome and restores its
status quo
upon viral infection, transformation with a foreign gene, or excess transcription of the cell genome.
Publisher
SP MAIK Nauka/Interperiodica,Springer Nature B.V
