Germination and sporulation of Colletotrichum acutatum on symptomless strawberry leaves

L. F.S. Leandro, M. L. Gleason, Jr Nutter, S. N. Wegulo, P. M. Dixon

Research output: Contribution to journalArticle

78 Scopus citations

Abstract

The germination and sporulation of Colletotrichum acutatum were characterized over time on strawberry leaves (cv. Tristar) and plastic coverslips incubated at 26°C under continuous wetness. Conidia germinated within 3 h after inoculation and formed melanized appressoria with pores by 9 h after inoculation. Host penetration was not observed up to 7 days after inoculation. Production of secondary conidia on conidial and hyphal phialides began within 6 h after inoculation, Secondary conidiation was responsible for up to a threefold increase in the total number of conidia within 7 days after inoculation. Primary conidia and hyphae began to collapse 48 h after inoculation, whereas melanized appressoria remained intact. These findings suggest that appressoria and secondary conidia of C. acutatum produced on symptomless strawberry foliage may be significant sources of inoculum for fruit infections.

Original languageEnglish (US)
Pages (from-to)659-664
Number of pages6
JournalPhytopathology
Volume91
Issue number7
DOIs
StatePublished - 2001

Keywords

  • Anthracnose
  • Microcyclic conidiation
  • Phyllosphere ecology

ASJC Scopus subject areas

  • Agronomy and Crop Science
  • Plant Science

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    Leandro, L. F. S., Gleason, M. L., Nutter, J., Wegulo, S. N., & Dixon, P. M. (2001). Germination and sporulation of Colletotrichum acutatum on symptomless strawberry leaves. Phytopathology, 91(7), 659-664. https://doi.org/10.1094/PHYTO.2001.91.7.659