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A microscopy study of hyphal growth of Penicillium rubens on gypsum under dynamic humidity conditions.

van Laarhoven KA, Huinink HP, Adan OC - Microb Biotechnol (2016)

Bottom Line: It was found that hyphal tips ceased to extend when exposed to any tested decrease in RH.However, new hyphal growth always emerges, seemingly from the old mycelium, suggesting that this indoor fungus does not rely only on conidia to survive the humidity patterns considered.These findings are a fundamental step in unravelling the effect of RH on indoor fungal growth.

View Article: PubMed Central - PubMed

Affiliation: Department of Applied Physics, Eindhoven University of Technology, Eindhoven, the Netherlands.

No MeSH data available.


Related in: MedlinePlus

The initial times at which individual hyphae became visible in the FOV of the microscope, grouped per RHmin. (A) The results from the experiments in which Δt = 24 h. (B) The results from the experiments in which Δt = 1 h. The vertical bars indicate the period of low RH.
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mbt212357-fig-0006: The initial times at which individual hyphae became visible in the FOV of the microscope, grouped per RHmin. (A) The results from the experiments in which Δt = 24 h. (B) The results from the experiments in which Δt = 1 h. The vertical bars indicate the period of low RH.

Mentions: Figure 6A shows the moments in time at which individual hyphae became visible in the FOV, grouped per RHmin. For Δt = 24 h (Fig. 6A) and a RHmin of 80% or 90%, the first new hyphae become visible within an hour after the end of the low RH period and from then, gradually, more hyphae keep appearing. The appearance of the first new hyphae following a RHmin of 70%, 60% or 50%, on the other hand, is delayed by 10, 20 or 40 h respectively.


A microscopy study of hyphal growth of Penicillium rubens on gypsum under dynamic humidity conditions.

van Laarhoven KA, Huinink HP, Adan OC - Microb Biotechnol (2016)

The initial times at which individual hyphae became visible in the FOV of the microscope, grouped per RHmin. (A) The results from the experiments in which Δt = 24 h. (B) The results from the experiments in which Δt = 1 h. The vertical bars indicate the period of low RH.
© Copyright Policy - creativeCommonsBy
Related In: Results  -  Collection

License
Show All Figures
getmorefigures.php?uid=PMC4835577&req=5

mbt212357-fig-0006: The initial times at which individual hyphae became visible in the FOV of the microscope, grouped per RHmin. (A) The results from the experiments in which Δt = 24 h. (B) The results from the experiments in which Δt = 1 h. The vertical bars indicate the period of low RH.
Mentions: Figure 6A shows the moments in time at which individual hyphae became visible in the FOV, grouped per RHmin. For Δt = 24 h (Fig. 6A) and a RHmin of 80% or 90%, the first new hyphae become visible within an hour after the end of the low RH period and from then, gradually, more hyphae keep appearing. The appearance of the first new hyphae following a RHmin of 70%, 60% or 50%, on the other hand, is delayed by 10, 20 or 40 h respectively.

Bottom Line: It was found that hyphal tips ceased to extend when exposed to any tested decrease in RH.However, new hyphal growth always emerges, seemingly from the old mycelium, suggesting that this indoor fungus does not rely only on conidia to survive the humidity patterns considered.These findings are a fundamental step in unravelling the effect of RH on indoor fungal growth.

View Article: PubMed Central - PubMed

Affiliation: Department of Applied Physics, Eindhoven University of Technology, Eindhoven, the Netherlands.

No MeSH data available.


Related in: MedlinePlus