scholarly journals Dimensionless numbers to study cell wall deformation of stiff mutants of Phycomyces blakesleeanus

Plant Direct ◽  
2019 ◽  
Vol 3 (12) ◽  
Author(s):  
Cindy M. Munoz ◽  
Joseph K. E. Ortega
Keyword(s):  
Cell Wall ◽  
Dimensionless Numbers ◽  
Phycomyces Blakesleeanus ◽  
Wall Deformation

Effect of the Urtica dioica agglutinin on germination and cell wall formation of Phycomyces blakesleeanus Burgeff

1992 ◽  
Vol 158 (1) ◽  
pp. 19-25 ◽  
Author(s):  
Jan Van Parijs ◽  
Hilde M. Joosen ◽  
Willy J. Peumans ◽  
Jan M. Geuns ◽  
André J. Van Laere
Keyword(s):  
Cell Wall ◽  
Urtica Dioica ◽  
Cell Wall Formation ◽  
Phycomyces Blakesleeanus ◽  
Wall Formation ◽  
Urtica Dioica Agglutinin

Cell wall carbohydrates in Phycomyces blakesleeanus burgeff

1977 ◽  
Vol 112 (3) ◽  
pp. 303-306 ◽  
Author(s):  
A. J. Van Laere ◽  
A. R. Carlier ◽  
J. A. Van Assche
Keyword(s):  
Cell Wall ◽  
Phycomyces Blakesleeanus ◽  
Cell Wall Carbohydrates

Hyperelastic Constitutive Modeling of Hexagonal Honeycombs Subjected to In-Plane Shear Loading

2010 ◽  
Vol 133 (1) ◽  
Author(s):  
Jaehyung Ju ◽  
Joshua D. Summers
Keyword(s):  
Cell Wall ◽  
Effective Properties ◽  
Nonlinear Behavior ◽  
Deformation Mode ◽  
Homogenization Method ◽  
Shear Loading ◽  
Plane Shear ◽  
Shear Property ◽  
Structural Applications ◽  
Wall Deformation

The in-plane flexible shear property of hexagonal honeycombs may be useful for the compliant structural applications. In this paper, hyperelastic strain energy functions are developed for a finite in-plane shear deformation of hexagonal honeycombs over a constituent material’s elastic range. Effective shear stress-strain curves of hexagonal structures and local cell wall deformation are investigated using the finite element based homogenization method. The hyperelastic models, which are only related to the effective properties of a honeycomb, may not be good enough to capture the nonlinear behavior at a high macroscopic shear strain level. The primary microscopic cell wall deformation mode under macroscopic in-plane shear loading was identified to be the bending of the vertical cell wall h, which is perpendicular to the macroscopic loading direction. The re-entrant hexagonal structures having a negative Poisson’s ratio shows a high macroscopic shear flexible property associated with the high h when the honeycombs are designed to have the same macroscopic shear modulus.

Residence-time dependent cell wall deformation of different Staphylococcus aureus strains on gold measured using surface-enhanced-fluorescence

Soft Matter ◽  
2014 ◽  
Vol 10 (38) ◽  
pp. 7638-7646 ◽  
Author(s):  
Jiuyi Li ◽  
Henk J. Busscher ◽  
Jan J. T. M. Swartjes ◽  
Yun Chen ◽  
Akshay K. Harapanahalli ◽  
...  
Keyword(s):  
Staphylococcus Aureus ◽  
Cell Wall ◽  
Bacterial Adhesion ◽  
Lipid Membrane ◽  
Time Dependent ◽  
Enhanced Fluorescence ◽  
Surface Enhanced Fluorescence ◽  
Surface Enhanced ◽  
Wall Deformation ◽  
Dependent Cell

Bacterial adhesion to surfaces is accompanied by cell wall deformation that may extend to the lipid membrane with an impact on the antimicrobial susceptibility of the organisms.

Surface enhanced fluorescence and nanoscopic cell wall deformation in adheringStaphylococcus aureusupon exposure to cell wall active and non-active antibiotics

Nanoscale ◽  
2018 ◽  
Vol 10 (23) ◽  
pp. 11123-11133 ◽  
Author(s):  
Vera Carniello ◽  
Brandon W. Peterson ◽  
Jelmer Sjollema ◽  
Henk J. Busscher ◽  
Henny C. van der Mei
Keyword(s):  
Cell Wall ◽  
Antibiotic Exposure ◽  
Enhanced Fluorescence ◽  
Surface Enhanced Fluorescence ◽  
Bacterial Response ◽  
Surface Enhanced ◽  
Wall Deformation

Surface enhanced fluorescence detects nanoscopic cell wall deformations in adhering staphylococci as a bacterial response to antibiotic exposure.

The structure and mechanics of cork

1981 ◽  
Vol 377 (1769) ◽  
pp. 99-117 ◽  
Keyword(s):  
Cell Wall ◽  
Energy Absorption ◽  
Cell Walls ◽  
Mechanical Characteristics ◽  
Large Energy ◽  
Sound Insulation ◽  
Special Shape ◽  
Wall Deformation ◽  
Absorbing Material ◽  
Size And Structure

The excellence of cork for stopping bottles, for thermal and sound insulation, and as a shock-absorbing material for flooring and packaging is due to the special shape, size and structure of its cells. When loaded, the cell walls bend or buckle, giving large recoverable deflexions and large energy absorption. We have investigated the structure of cork and have measured its moduli and other mechanical characteristics. These can be broadly explained in terms of cell-wall deformation.

The significance of cAMP induced alterations in the cellular structure of Phycomyces

1977 ◽  
Vol 23 (4) ◽  
pp. 378-388 ◽  
Author(s):  
J. C. Tu ◽  
S. K. Malhotra
Keyword(s):  
Cell Wall ◽  
Plasma Membrane ◽  
Chitin Synthesis ◽  
Phycomyces Blakesleeanus ◽  
Thin Sections ◽  
Tube Emergence ◽  
Membrane Bound ◽  
Time Required ◽  
Small Clusters ◽  
Different Levels

Effect of cyclic AMP (cAMP) on Phycomyces blakesleeanus was studied by growing sporangiospores on glucose–asparagine agar or liquid medium containing three different levels of cAMP (10, 20 and 40 μM) in addition to the control (no cAMP added). The response of Phycomyces to the exogenous cAMP concentration in the medium is as follows: (1) the time required for germ tube emergence is reduced; (2) the diameter of the mycelium is increased (sometimes more than 10 times) and frequency of branching is also increased; (3) the cell wall of the mycelium is thickened (in some cases more than 5 times); (4) the glycogen in the cytoplasm is decreased as visualized in thin sections and also demonstrated in biochemical quantitation; and (5) the distribution of intercalated membranous particles (Imp) on plasma membrane is altered and this can be easily detected in freeze-fractured replica. Such a change in Imp is seen in the formation of small clusters of aggregated particles on the plasmic half (PF) and craters on the complementary exoplasmic half(EF)of the plasma membrane. Although the mechanism of cAMP action requires further exploration, it is possible that the addition of cAMP to the culture medium leads to degradation of glycogen and enhancement of chitin synthesis since the cell wall is largely composed of chitin. The alteration in Imp may be related to a change in the activity of chitin synthetase which is a plasma membrane-bound enzyme.

scholarly journals Cell Wall Loosening in the Fungus, Phycomyces blakesleeanus

Plants ◽  
2015 ◽  
Vol 4 (1) ◽  
pp. 63-84 ◽  
Author(s):  
Joseph Ortega ◽  
Jason Truong ◽  
Cindy Munoz ◽  
David Ramirez
Keyword(s):  
Cell Wall ◽  
Phycomyces Blakesleeanus ◽  
Cell Wall Loosening ◽  
Wall Loosening

scholarly journals Dimensionless Numbers to Analyze Expansive Growth Processes

Plants ◽  
2019 ◽  
Vol 8 (1) ◽  
pp. 17 ◽  
Author(s):  
Joseph Ortega
Keyword(s):  
Growth Rate ◽  
Plastic Deformation ◽  
Water Uptake ◽  
Uptake Rate ◽  
Deformation Rate ◽  
Relaxation Rates ◽  
Dimensionless Numbers ◽  
Phycomyces Blakesleeanus ◽  
Biophysical Processes ◽  
Sensory Responses

Cells of algae, fungi, and plants have walls and exhibit expansive growth which can increase their volume by as much as 10,000 times. Expansive growth is central to their morphogenesis, development, and sensory responses to environmental stimuli. Equations describing the biophysical processes of the water uptake rate and the wall deformation rate have been derived, validated, and established. A significant amount of research provides insight into the molecular underpinnings of these processes. What is less well known are the relative magnitudes of these processes and how they compare during expansive growth and with walled cells from other species. Here, dimensionless numbers (Π parameters) are used to determine the magnitudes of the biophysical processes involved in the expansive growth rate of cells from algae (Chara corallina), fungi (Phycomyces blakesleeanus), and plants (Pisum satinis L.). It is found for all three species that the cell’s capability for the water uptake rate is larger than the wall plastic deformation rate and much larger than the wall elastic deformation rate. Also, the wall plastic deformation rates of all three species are of similar magnitude as their expansive growth rate even though the stress relaxation rates of their walls are very different. It is envisioned that dimensionless numbers can assist in determining how these biophysical processes change during development, morphogenesis, sensory responses, environmental stress, climate change, and after genetic modification.

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