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Relationship between growth behaviour, micro and macroscopic morphologies and freezing sensitivity of the ripening starter Geotrichum candidum is strain specific and mostly related to the morphotypes: the arthrospores/hyphae parameter

  • Ghalia Missous (a1) (a2), Bouachanh Thammavongs (a1), Géraldine Launay (a2), Micheline Guéguen (a1), Virginie Dieuleveux (a2) and Jean-Michel Panoff (a1) (a3)...

Abstract

Microscopic conformation, growth behaviour and freezing sensitivity of seven strains of Geotrichum candidum, a ripening starter, were studied and compared according to their macroscopic morphotypes. It has been shown that the thallus forming units (TFUml−1/OD600nm ratio as a function of time is an interesting parameter to follow G. candidum sporulation through the growth behaviour. Microscopic conformation, growth behaviour and freezing sensitivity are clearly strain specific and mostly related to their corresponding morphotypes “yeast”, “mould” or “intermediate”. The two “mould” strains that sporulate weakly (UCMA103, UCMA499) showed a low survival rate to freezing stress whereas the “yeast” strains expressed a significant resistance owing to the arthrospore abundance. Interestingly, one strain (UCMA96) which appeared on solid medium in accord with the “mould” morphotype respond similarly to freezing stress.

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Corresponding author

*For correspondence; e-mail: jean-michel.panoff@unicaen.fr

References

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Keywords

Relationship between growth behaviour, micro and macroscopic morphologies and freezing sensitivity of the ripening starter Geotrichum candidum is strain specific and mostly related to the morphotypes: the arthrospores/hyphae parameter

  • Ghalia Missous (a1) (a2), Bouachanh Thammavongs (a1), Géraldine Launay (a2), Micheline Guéguen (a1), Virginie Dieuleveux (a2) and Jean-Michel Panoff (a1) (a3)...

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