Determination of Tip Shape in Fungal Hyphae

Saunders, Peter; Trinci, Anthony P. J.

doi:10.1099/00221287-110-2-469

Cited by 43 publications

(18 citation statements)

References 10 publications

(6 reference statements)

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“…This is an important message because the idea that turgor pressure is responsible for shaping hyphae and for causing them to extend at their tips has been expressed in many studies (e.g., Park and Robinson, 1966;Saunders and Trinci, 1979;Koch, 1982Koch, , 1994. These are examples of wishful thinking of turgor, because the experiments I have discussed suggest that pressure plays little if any fundamental role in hyphal growth and morphogenesis.…”

Section: Discussionmentioning

confidence: 90%

Wishful Thinking of Turgor Revisited: The Mechanics of Fungal Growth

Money

1997

Fungal Genetics and Biology

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Section: Discussionmentioning

confidence: 90%

Wishful Thinking of Turgor Revisited: The Mechanics of Fungal Growth

Money

1997

Fungal Genetics and Biology

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“…This predicted a cotangent relationship between the specific rate of wall growth and distance from the apex, which fitted qualitatively with data on vesicle concentration, rates of incorporation of tritiated GlcNAc and direct measures of wall expansion. Saunders & Trinci (1979) proposed that the shape of the hyphal tip resulted from an interaction between the internal hydrostatic pressure, resulting from growth, and the elastic properties of the tip wall, reflecting rates of incorporation of new material. The shape adopted is that which minimizes surface energy within the apical wall.…”

Section: Introductionmentioning

confidence: 99%

Apical hyphal extension in Streptomyces coelicolor A3(2)

Gray

Gooday

Prosser

1990

Journal of General Microbiology

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Hyphal extension in the filamentous actinomycete Sfreptomyces coeficofor A3(2) was shown to occur by addition of newly synthesized wall material in an apical extension zone. Incubation of mycelia with tritiated N-acetyl-Dglucosamine (GlcNAc), a precursor of peptidoglycan, resulted in localized incorporation of label at the apex, as indicated by light microscopic and electron microscopic autoradiography. Within the hyphal extension zone there was a sharp decrease in incorporation with increasing distance from the apex. Hyphal tip shape, examined by lowtemperature scanning electron microscopy, approximated to a semi-ellipsoid of revolution and was not hemispherical. Tip shape could be represented accurately by polynomial equations of degree less than seven. The surface stress theory was successfully applied to hyphal tip growth, with tip shape related qualitatively to the inverse of surface tension within the wall of the extension zone. Surface tension was assumed to be inversely proportional to the rate of incorporation of tritiated GlcNAc. Treatment of surface-grown hyphae with p-lactam antibiotics resulted in localized swelling of hyphal tips. Lysozyme caused swelling of tips and of other regions of hyphae, frequently giving a beaded morphology associated with septa.

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“…Each branch grows apically, the apex being dome-shaped. Secretory vesicles bring building material to the apex; the new wall is softer than the older parts; the turgor pressure pushes the apical wall, in this way elongating the tube; the hyphae grow non-uniformly, with periods of fast growth alternating with periods of slow growth (Saunders and Trinci, 1979;Gray et al, 1990;Harold, 1990Harold, , 2002Wessels, 1993;Lopéz-Franco et al, 1994;Money, 2001;Ma et al, 2005;Taheri-Talesh et al, 2008). The wall of the maternal hypha softens (Saunders and Trinci, 1979) or thins (Mullins and Ellis, 1974) at the sites where new branches (evaginations) are formed.…”

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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Determination of Tip Shape in Fungal Hyphae

Cited by 43 publications

References 10 publications

Wishful Thinking of Turgor Revisited: The Mechanics of Fungal Growth

Wishful Thinking of Turgor Revisited: The Mechanics of Fungal Growth

Apical hyphal extension in Streptomyces coelicolor A3(2)

Mechanical transformations of living cavitary bodies

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