Growth and morphogenesis inSaprolegnia ferax: Is turgor required?

Harold, Ruth L.; Money, Nicholas P.; Harold, Franklin M.

doi:10.1007/bf01280830

Cited by 40 publications

(52 citation statements)

References 31 publications

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“…The validity of the method was tested by reference to large hyphae of the oomycete S. ferax, whose turgor pressure has been studied extensively with the pressure probe and a variety of other techniques (reviewed by Harold et al, 1996). For example, direct measurements from hyphae with the pressure probe gave a turgor pressure of 0.44 6 0.01 MPa (mean 6 standard error, n 5 13; Money and Harold, 1993).…”

Section: Methodsmentioning

confidence: 99%

Confirmation of a Link between Fungal Pigmentation, Turgor Pressure, and Pathogenicity Using a New Method of Turgor Measurement

Money

Howard

1996

Fungal Genetics and Biology

123

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Section: Methodsmentioning

confidence: 99%

Confirmation of a Link between Fungal Pigmentation, Turgor Pressure, and Pathogenicity Using a New Method of Turgor Measurement

Money

Howard

1996

Fungal Genetics and Biology

123

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“…But the confortable consensus has been challenged by the discovery that certain oömycetes can extend and produce true hyphae even under conditions that reduce turgor to the point where it is no longer measurable (63,96,114). Evidently, turgor pressure is not universally required for tip growth.…”

Section: Force and Formmentioning

confidence: 99%

Molecules into Cells: Specifying Spatial Architecture

Harold

2005

Microbiol Mol Biol Rev

150

157

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SUMMARY A living cell is not an aggregate of molecules but an organized pattern, structured in space and in time. This article addresses some conceptual issues in the genesis of spatial architecture, including how molecules find their proper location in cell space, the origins of supramolecular order, the role of the genes, cell morphology, the continuity of cells, and the inheritance of order. The discussion is framed around a hierarchy of physiological processes that bridge the gap between nanometer-sized molecules and cells three to six orders of magnitude larger. Stepping stones include molecular self-organization, directional physiology, spatial markers, gradients, fields, and physical forces. The knowledge at hand leads to an unconventional interpretation of biological order. I have come to think of cells as self-organized systems composed of genetically specified elements plus heritable structures. The smallest self that can be fairly said to organize itself is the whole cell. If structure, form, and function are ever to be computed from data at a lower level, the starting point will be not the genome, but a spatially organized system of molecules. This conclusion invites us to reconsider our understanding of what genes do, what organisms are, and how living systems could have arisen on the early Earth.

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“…Even its erstwhile supporters have had misgivings (compare Harold, 1990 andHarold, 2002). The doubts were caused by the report that the hyphae of oomycetes (Saprolegnia, Achlya) could grow at very low or even zero turgor (Money and Harold, 1993;Harold et al, 1996). What can move the cell apex if not the pressure of the liquid inner mass?…”

Section: Cellsmentioning

confidence: 99%

Mechanical transformations of living cavitary bodies

Borkhvardt

2017

BioComm

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All living organisms and many of their parts are organised in an essentially similar manner: they are closed cavitary bodies consisting of 1) the inner mass and 2) a relatively thin sheath enclosing it. This organisation allows living bodies to change shape by employing hydrostatic forces. These forces are generally recognised to govern changes of shape in walled cells. To explain transformations of other organisms, other factors are usually sought. In this paper, the hydrostatic mechanism is represented as a universal mode of shape formation. It acts in all kinds of organisms, determining the course of diverse processes such as development of cell outgrowths, limb buds, gut derivatives and sense organs; endocytosis; cell division; branching of capillaries; gastrulation; cell locomotion; muscle contraction etc.

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Growth and morphogenesis inSaprolegnia ferax: Is turgor required?

Cited by 40 publications

References 31 publications

Confirmation of a Link between Fungal Pigmentation, Turgor Pressure, and Pathogenicity Using a New Method of Turgor Measurement

Confirmation of a Link between Fungal Pigmentation, Turgor Pressure, and Pathogenicity Using a New Method of Turgor Measurement

Molecules into Cells: Specifying Spatial Architecture

Mechanical transformations of living cavitary bodies

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