European Journal of Plant Pathology

, Volume 137, Issue 3, pp 495–504

Rhabdocline needle cast—investigations on various Douglas fir tissue types

  • Kristin Morgenstern
  • Matthias Döring
  • Doris Krabel
Article

DOI: 10.1007/s10658-013-0261-0

Cite this article as:
Morgenstern, K., Döring, M. & Krabel, D. Eur J Plant Pathol (2013) 137: 495. doi:10.1007/s10658-013-0261-0

Abstract

Douglas fir (Pseudotsuga menziesii) is one of the most important non-indigenous tree species in Germany. The species is characterized by a wide amplitude of growing conditions, and is of increasing interest, in particular from the perspective of climate change. Douglas fir is nevertheless particularly susceptible to fungal pathogens, such as Rhabdocline pseudotsugae. The aim of the present study was therefore to develop an early detection method for R. pseudotsugae based on the polymerase chain reaction (PCR). Existing molecular techniques were adapted and optimized to detect the pathogen in small sample volumes. Both healthy and infected Douglas firs were examined, with various tissue types (buds, cambial tissue, needles) and seeds tested for the presence of R. pseudotsugae. Non-infected Douglas firs did not give positive responses in the molecular analyses, but the pathogen was clearly detected in buds, cambial tissues, needles and seeds of infected trees. To date, the fungus has been considered an obligate biotrophic needle parasite. The present results provide clear evidence, however, for the existence of an endophytic stage in the life cycle of R. pseudotsugae. In contrast with previous studies, this paper investigates the dispersal of the fungus via seeds.

Keywords

Endophytes Fungal distribution Rhabdocline pseudotsugae Polymerase chain reaction Pseudotsugae menziesii 

Copyright information

© KNPV 2013

Authors and Affiliations

  • Kristin Morgenstern
    • 1
  • Matthias Döring
    • 2
  • Doris Krabel
    • 1
  1. 1.Technische Universität Dresden, Institute of Forest Botany and Forest ZoologyWorking Group: Molecular Physiology of Woody PlantsTharandtGermany
  2. 2.Institut für PflanzenkulturSchnegaGermany

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