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Mycoscience

, 42:51 | Cite as

Phylogenetic confirmation ofCalonectria spathulata andCylindrocladium leucothoes based on morphology, and sequence data of the β-tubulin and ITS rRNA genes

  • Pedro W. Crous
  • Ji-Chuan Kang
Original Papers

Abstract

ACalonectria sp. forming aCylindrocladium anamorph was found to be commonly associated with leaf spot and cutting rot ofEucalyptus in Brazil, Colombia, Ecuador and Argentina. Based on morphology, isolates of this species resembledCal. hederae, Cal. reteaudii andCy. leucothoes, taxa that are commonly referred to as theCal. reteaudii-complex. Using DNA sequence data of the ITS1, 5.8S and ITS2 of the rRNA gene, as well as the β-tubulin gene, this species was shown to represent a previously described, but rather poorly known species,Cal. spathulata, for which an emended description is provided. Furthermore, the recently describedCy. perseae was also shown to be synonymous withCy. leucothoes, a species shown to be distinct fromCy. spathulatum. Based on vesicle and conidium morphology, as well as perithecial colour and ascospore morphology, it appears thatCal. hederae andCal. reteaudii should also be retained as separate species. Additional collections and cultures would be required, however, to suitably characterise the latter two species in future studies.

Key Words

Calonectria Cylindrocladium fungal plant pathogen Hypocreales Eucalyptus 

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Copyright information

© The Mycological Society of Japan 2001

Authors and Affiliations

  • Pedro W. Crous
    • 1
  • Ji-Chuan Kang
    • 1
  1. 1.Department of Plant PathologyUniversity of StellenboschMatielandSouth Africa

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