Abstract
From a rigorous momentum balance it was shown that fungal turgor pressure can be expressed as a sum of two components : a) a static contribution, related to the membrane elastic properties and resolved by capillary probe measurements; b) a dynamic part ( ΔP), responsible for the hyphal extension rate and proportional to it. Both contributions add up and explain why some researchers have found hyphae growing at finite rates when the capillary probe measures no pressure difference at all. This approach was applied to Aspergillus oryzae and we have found an increasing relation between the dynamic part of turgor pressure ( ΔP) and hyphal extension rate.
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