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Morphological Variations in Conidia of Arthrobotrys oligospora on Different Media

R K Singh1, Niranjan Kumar, K P Singh

  • 1Department of Mycology and Plant Pathology, Institute of Agricultural Sciences, Banaras Hindu University, Varanasi-221005, India.

Mycobiology
|September 20, 2013
PubMed

Insights

Arthrobotrys oligospora conidia size varies across different nutrient media. Beef extract and nutrient agar produced larger spores, while Czapek's and Martin's media yielded smaller ones.

Area of Science:

  • Mycology
  • Fungal Morphology
  • Nematology

Background:

  • Arthrobotrys oligospora is a common predatory fungus.
  • Fungal spore morphology can be influenced by environmental factors.
  • Understanding spore variation is crucial for fungal identification and application.

Purpose of the Study:

  • To investigate the variation in size and shape of Arthrobotrys oligospora conidia.
  • To determine the effect of different culture media on conidial morphology.
  • To assess if nematode infestation influences conidial size.

Main Methods:

  • Culturing Arthrobotrys oligospora on various standard media (beef extract, nutrient agar, Richard's YPSS, Sabouraud's, PDA, corn meal agar, Czapek's, Jensen's, Martin's).
  • Comparing conidia length and width across different media.
  • Evaluating conidial size on nematode-infested versus non-infested corn meal agar.

Main Results:

  • Significant variation in conidia size and shape was observed across tested media.
  • Larger conidia were formed on beef extract and nutrient agar.
  • Smaller conidia were produced on Czapek's, Jensen's, and Martin's media.
  • Maximum conidia width was noted on YPSS and Sabouraud's media.
  • Slightly larger average spore size was observed on nematode-infested corn meal agar compared to uninfested medium.

Conclusions:

  • Culture medium composition significantly impacts Arthrobotrys oligospora conidial morphology.
  • Specific media can promote the formation of larger or smaller conidia.
  • Nematode presence may have a minor influence on conidial size.
Keywords:
Arthrobotrys oligosporaMMA = corn meal agar mediumMorphological variationNAM = nutrient agar mediumPDA = potato dextrose agar mediumYPSS = yeast extract peptone soluble starch medium

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