ArticleProceedings of the National Academy of Sciences of the United States of America1992
Extension growth of the water mold Achlya: interplay of turgor and wall strength.
Article in Proceedings of the National Academy of Sciences of the United States of America, 1992. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 14 papers.
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Who cites it
14 citing papers in PubMed, 89 citations in OpenAlex.
- The curtain model as an alternative and complementary to the classic turgor concept of filamentous fungi.Archives of microbiology · 2025Review
- Pico gauges for minimally invasive intracellular hydrostatic pressure measurements.Plant physiology · 2014Article
- Hyphal growth in human fungal pathogens and its role in virulence.International journal of microbiology · 2012Article
- How does a hypha grow? The biophysics of pressurized growth in fungi.Nature reviews. Microbiology · 2011Review
- How to shape a cylinder: pollen tube as a model system for the generation of complex cellular geometry.Sexual plant reproduction · 2010Review
- Explaining lengths and shapes of yeast by scaling arguments.PloS one · 2009Article
- Implications of a poroelastic cytoplasm for the dynamics of animal cell shape.Seminars in cell & developmental biology · 2008Review
- Hyphal growth: a tale of motors, lipids, and the Spitzenkörper.Eukaryotic cell · 2007Review
- Article
- Pectin and the role of the physical properties of the cell wall in pollen tube growth of Solanum chacoense.Planta · 2005Article
- Antifungal proteins.Applied and environmental microbiology · 2001Review
- Rapid regulation by acid pH of cell wall adjustment and leaf growth in maize plants responding to reversal of water stressPlant physiology · 1998Article
- Pressure regulation of the electrical properties of growing Arabidopsis thaliana L. root hairs.Plant physiology · 1996Article
- Transmission of the effect of an antifungal agent within a single hypha.Applied microbiology and biotechnology · 1995Article
Corrections and comments
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Authors and funding
2 authors at 1 institution in 1 country.
Funding
No grant is acknowledged in the PubMed record.
Abstract
When hyphae of the water mold Achlya were subjected to osmotic stress, imposed with polyethylene glycol (PEG)-300 or sucrose, turgor pressure fell in proportion to the increase in external osmotic pressure. There was no evidence of turgor regulation, even over a period of days, yet the extension rate was unaffected until turgor was reduced to less than a third of the normal level of 0.6-0.8 MPa (6-8 bars). Measurements of the pressure at which the hyphae burst indicate that they respond to osmotic stress by softening their apical cell walls, sustaining extension growth despite reduced turgor pressure. The effect of osmolytes excluded by the wall was very different; superfusion of growing hyphae with PEG-6000 or dextran-6000 reduced turgor and stopped extension but did not induce wall softening. Furthermore, the hyphae did not resume growth during an hour or more of continuous exposure to these substances. Although the two classes of osmolytes have the same effect on turgor, they may induce different strains within the cell wall; this might then affect the capacity of the organism to detect the drop in turgor or to soften its cell wall. The interplay between turgor and wall strength supports the proposition that turgor supplies the driving force for extension and that production of the standard hyphal form requires a balance between hydrostatic pressure and a resistive cell wall.
Identifiers
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Registered trials
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