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Current Genetics

, Volume 37, Issue 2, pp 152–157 | Cite as

Regulation of endopolygalacturonase gene expression in Botrytis cinerea by galacturonic acid, ambient pH and carbon catabolite repression

  • Jos P. Wubben
  • Arjen ten Have
  • Jan A. L. van Kan
  • Jaap Visser
ORIGINAL PAPER

Abstract

 The phytopathogenic fungus Botrytis cinerea produces a set of endopolygalacturonases (endoPGs) which are involved in the enzymatic degradation of pectin in plant cell walls. The endoPG-encoding genes of B. cinerea are differentially expressed when the fungus is grown in liquid culture on different carbon sources. A basic constitutive expression level was observed for two genes, Bcpg1 and Bcpg2, which encode basic isozymes. Galacturonic acid was shown to induce the expression of Bcpg4 and Bcpg6. Low pH of the culture medium resulted in induced expression of the Bcpg3 gene. Expression of the Bcpg5 gene was inducible; however the inducing factors could not be identified. Finally, galacturonic acid-induced expression of the Bcpg4 gene was repressed by the presence of more-favourable carbon sources, such as glucose.

Key words Botrytis cinerea Endopolygalacturonase Gene expression Galacturonic acid 

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Copyright information

© Springer-Verlag Berlin Heidelberg 2000

Authors and Affiliations

  • Jos P. Wubben
    • 1
  • Arjen ten Have
    • 2
  • Jan A. L. van Kan
    • 2
  • Jaap Visser
    • 1
  1. 1.Section of Molecular Genetics of Industrial Micro-organisms, Wageningen University, Dreijenlaan 2, 6703 HA Wageningen, The Netherlands e-mail: office@algemeen.mgim.wau.nl Tel.: +31-317-482865/484439 Fax: +31-317484011NL
  2. 2.Laboratory of Phytopathology, Wageningen Agricultural University, Binnenhaven 9, 6709 PD Wageningen, The NetherlandsNL

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