Trees

, Volume 15, Issue 1, pp 25–31 | Cite as

Tyloses and gels associated with cellulose accumulation in vessels are responses of plane tree seedlings (Platanus × acerifolia) to the vascular fungus Ceratocystis fimbriata f. sp platani

  • Alain Clérivet
  • Véronique Déon
  • Ibtissam Alami
  • Fredérique Lopez
  • Jean-Paul Geiger
  • Michel Nicole
Original Article

Abstract

Stems of plane tree seedlings were cytologically investigated regarding the involvement of tyloses and gels in defense reactions to Ceratocystis fimbriata f. sp platani, the canker stain disease agent. In the lumen of infected xylem vessels, cytochemical tests revealed the occurrence of compounds labeled for cellulose and which seem to be involved in gel formation. Immunogold methods indicated that pectin-rich material accumulated in the paramural area of vessel-associated parenchyma cells and around tylosis walls. Tylosis formation and deposition of pectin-containing gels were associated with metabolic changes of vessel-associated parenchyma cells. It is suggested that parenchyma cells play a key role in the defense of plane tree seedlings through plugging of xylem vessels leading to compartmentalization of the vascular fungus.

Platanus Ceratocystis Tylose Pectin Cellulose 

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Copyright information

© Springer-Verlag 2000

Authors and Affiliations

  • Alain Clérivet
    • 1
  • Véronique Déon
    • 1
  • Ibtissam Alami
    • 1
  • Fredérique Lopez
    • 2
  • Jean-Paul Geiger
    • 2
  • Michel Nicole
    • 2
  1. 1.Laboratoire de Biotechnologie et Physiologie Végétale Appliquée, EA 728, Université Montpellier 2, Place Eugène Bataillon, 34095 Montpellier Cedex 5France
  2. 2.IRD. GENETROP – Unité de Phytopathologie, BP 5045, 34032 MontpellierFrance

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