Microcyclic conidiogenesis in powdery mildews and its association with intracellular parasitism by Ampelomyces

L. Kiss, Alexandra Pintye, Györgyi Zséli Zséli, Tünde Jankovics, Orsolya Szentiványi, Yaser M. Hafez, Roger T A Cook

Research output: Contribution to journalArticle

15 Citations (Scopus)

Abstract

Microcyclic conidiogenesis (MC), a process defined as the production of conidia on a spore without any, or only a minimal, involvement of hyphal growth, has recently been reported in a little known powdery mildew species, Oidium longipes. To investigate whether this was an isolated case or it is a more general phenomenon in powdery mildew fungi, germinating conidia of eight species of the Erysiphales were examined using light microscopy. The following species were included in this work: Erysiphe necator on grapevine, Blumeria graminis f. sp. hordei on barley, Podosphaera xanthii on cucumber, Erysiphe sp. on Ligustrum vulgare, O. longipes on Petunia x grandiflora, O. neolycopersici on tomato, Golovinomyces cichoracearum on Rudbeckia laciniata and Sawadaea sp. on Acer negundo. In all these species, up to 4% of the germinated conidia exhibited MC. Moreover, when colonies of E. necator and O. neolycopersici, on detached grapevine and tomato leaves, respectively, were treated with a conidial suspension of Ampelomyces, the intracellular pycnidia of these mycoparasites appeared in microcyclic conidiophores. This represents a yet undescribed method of accelerating asexual reproduction in this mycoparasite. In the life cycle of powdery mildews, the importance of MC is still not clear but it should be taken into consideration when conidial germination is studied on the host surface for purposes such as epidemiology or species identification.

Original languageEnglish
Pages (from-to)445-451
Number of pages7
JournalEuropean Journal of Plant Pathology
Volume126
Issue number4
DOIs
Publication statusPublished - Apr 2010

Fingerprint

Ampelomyces
mildews
Uncinula necator
conidia
mycoparasites
parasitism
powdery mildew
Rudbeckia laciniata
Ligustrum vulgare
Erysiphales
Acer negundo
tomatoes
Oidium
Erysiphe
Podosphaera
Blumeria graminis f. sp. hordei
pycnidia
conidiophores
Petunia
asexual reproduction

Keywords

  • Conidial germination
  • Erysiphales
  • Microcyclic conidiation
  • Mycoparasitism

ASJC Scopus subject areas

  • Agronomy and Crop Science
  • Horticulture
  • Plant Science

Cite this

Microcyclic conidiogenesis in powdery mildews and its association with intracellular parasitism by Ampelomyces. / Kiss, L.; Pintye, Alexandra; Zséli, Györgyi Zséli; Jankovics, Tünde; Szentiványi, Orsolya; Hafez, Yaser M.; Cook, Roger T A.

In: European Journal of Plant Pathology, Vol. 126, No. 4, 04.2010, p. 445-451.

Research output: Contribution to journalArticle

Kiss, L. ; Pintye, Alexandra ; Zséli, Györgyi Zséli ; Jankovics, Tünde ; Szentiványi, Orsolya ; Hafez, Yaser M. ; Cook, Roger T A. / Microcyclic conidiogenesis in powdery mildews and its association with intracellular parasitism by Ampelomyces. In: European Journal of Plant Pathology. 2010 ; Vol. 126, No. 4. pp. 445-451.
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