Effects of NaCl on water relations and cell wall elasticity and composition of red-osier dogwood (Cornus stolonifera) seedlings

2004 ◽  
Vol 121 (2) ◽  
pp. 265-271 ◽  
Author(s):  
Jennifer Mustard ◽  
Sylvie Renault
Keyword(s):  
Cell Wall ◽  
Water Relations ◽  
Cell Wall Elasticity ◽  
Cornus Stolonifera

A comparison of systematic errors between the Richards and Hammel methods of measuring tissue – water relations parameters

1978 ◽  
Vol 56 (17) ◽  
pp. 2153-2161 ◽  
Author(s):  
M. T. Tyree ◽  
M. E. MacGregor ◽  
A. Petrov ◽  
M. I. Upenieks
Keyword(s):  
Cell Wall ◽  
Osmotic Pressure ◽  
Water Relations ◽  
Turgor Pressure ◽  
Systematic Errors ◽  
Tissue Water ◽  
Cell Wall Elasticity ◽  
Pressure Bomb ◽  
Bomb Method

The pressure bomb is being used to a much greater extent to measure some tissue – water relations parameters such as osmotic pressure, turgor pressure, and cell wall elasticity. Recently, Richards has developed a faster pressure-bomb method of obtaining these and other parameters than the method used by Hammel and modified by us. In this paper, we compare the two methods and conclude that Richards’ method should not be used when accuracy is deemed important. The Richards method usually overestimates osmotic pressure by 0.2 MPa (= 2 bars) and sometimes by 0.8 MPa (= 8 bars).

Water Relations and Cell Wall Elasticity Quantities inPhaseolus vulgarisLeaves

1984 ◽  
Vol 35 (6) ◽  
pp. 841-858 ◽  
Author(s):  
JOON HO KIM ◽  
OK YOUNG LEE-STADELMANN
Keyword(s):  
Cell Wall ◽  
Water Relations ◽  
Cell Wall Elasticity

Atomic force microscopy based analysis of cell-wall elasticity in macroalgae

2018 ◽  
pp. 335-347 ◽  
Author(s):  
Thomas Torode ◽  
Marina Linardic ◽  
J. Louis Kaplan ◽  
Siobhan A. Braybrook
Keyword(s):  
Atomic Force Microscopy ◽  
Cell Wall ◽  
Force Microscopy ◽  
Cell Wall Elasticity ◽  
Atomic Force

scholarly journals Growth and Physiological Traits Associated with Drought Survival and Post-drought Recovery in Perennial Turfgrass Species

2010 ◽  
Vol 135 (2) ◽  
pp. 125-133 ◽  
Author(s):  
Qi Chai ◽  
Fang Jin ◽  
Emily Merewitz ◽  
Bingru Huang
Keyword(s):  
Cell Wall ◽  
Drought Stress ◽  
Osmotic Adjustment ◽  
Perennial Grass ◽  
Kentucky Bluegrass ◽  
Physiological Traits ◽  
Grass Species ◽  
Cell Wall Elasticity ◽  
Drought Recovery ◽  
Drought Survival

The objective of this study was to determine physiological traits for drought survival and post-drought recovery upon re-watering in two C3 perennial grass species, kentucky bluegrass [KBG (Poa pratensis)] and perennial ryegrass [PRG (Lolium perenne)]. Plants were maintained well watered or exposed to drought stress by withholding irrigation and were then re-watered in a growth chamber. KBG had significantly higher grass quality and leaf photochemical efficiency, and lower electrolyte leakage than PRG during 20 days of drought. After 7 days of re-watering, drought-damaged leaves were rehydrated to the control level in KBG, but could not fully recover in PRG. KBG produced a greater number of new roots, while PRG had more rapid elongation of new roots after 16 days of re-watering. Superior drought tolerance in KBG was associated with osmotic adjustment, higher cell wall elasticity, and lower relative water content at zero turgor. Osmotic adjustment, cell wall elasticity, and cell membrane stability could play important roles in leaf desiccation tolerance and drought survival in perennial grass species. In addition, post-drought recovery of leaf hydration level and physiological activity could be associated with the accumulation of carbohydrates in leaves and rhizomes during drought stress and new root production after re-watering.

Cell wall elasticity and Water Index (R970 nm/R900 nm) in wheat under different nitrogen availabilities

1996 ◽  
Vol 17 (2) ◽  
pp. 373-382 ◽  
Author(s):  
J. PENUELAS ◽  
I. FILELLA ◽  
L. SERRANO ◽  
R. SAVÉ
Keyword(s):  
Cell Wall ◽  
Water Index ◽  
Cell Wall Elasticity

Impact of drought on growth, photosynthesis, osmotic adjustment, and cell wall elasticity in Damask rose

2020 ◽  
Vol 150 ◽  
pp. 133-139 ◽  
Author(s):  
Hatim Al-Yasi ◽  
Houneida Attia ◽  
Khalid Alamer ◽  
Fahmy Hassan ◽  
Esmat Ali ◽  
...  
Keyword(s):  
Cell Wall ◽  
Osmotic Adjustment ◽  
Cell Wall Elasticity ◽  
Damask Rose

Response of red-osier dogwood (Cornus sericea) seedlings to NaCl during the onset of bud break

2006 ◽  
Vol 84 (5) ◽  
pp. 844-851 ◽  
Author(s):  
Jennifer Mustard ◽  
Sylvie Renault
Keyword(s):  
Cell Wall ◽  
Osmotic Potential ◽  
Dry Mass ◽  
Bud Break ◽  
Pressure Potential ◽  
Shoot Height ◽  
Cell Wall Elasticity ◽  
Greenhouse Study ◽  
Cornus Sericea ◽  
Bud Breaking

A greenhouse study was designed to test the response of red-osier dogwood (Cornus sericea L.) to NaCl during the onset of bud break. Seedlings treated with 50 mmol·L–1 NaCl for 32 d had lower shoot dry mass and shoot height than untreated seedlings. Transpiration and photosynthetic rates, chlorophyll b and carotenoid concentrations of red-osier dogwood seedlings were significantly reduced by NaCl treatment. The shoots of seedlings treated with 50 mmol·L–1 NaCl had a higher bulk modulus of cell wall elasticity than those of untreated seedlings, but the water potential components determined from the pressure-volume curves, osmotic potential and pressure potential at full turgor and osmotic potential at pressure loss, suggest that this change did not contribute to salt tolerance. Minor changes, including a small increase in arabinose of the hemicellulose fraction and a decrease in both galactose and rhamnose of the pectin fraction, also occurred in response to NaCl treatment. These changes in cell wall composition and elasticity could be partly attributed to differences in the developmental stage of the shoot tissues resulting from the delay in bud breaking in salt treated plants.

scholarly journals Dynamics of cell wall elasticity pattern shapes the cell during yeast mating morphogenesis

Open Biology ◽  
2016 ◽  
Vol 6 (9) ◽  
pp. 160136 ◽  
Author(s):  
Björn Goldenbogen ◽  
Wolfgang Giese ◽  
Marie Hemmen ◽  
Jannis Uhlendorf ◽  
Andreas Herrmann ◽  
...  
Keyword(s):  
Cell Wall ◽  
Cell Shape ◽  
Experimental Approach ◽  
Time Resolved ◽  
Force Microscopy ◽  
Cell Wall Elasticity ◽  
Atomic Force ◽  
Stiff Material ◽  
Mating Projection

The cell wall defines cell shape and maintains integrity of fungi and plants. When exposed to mating pheromone, Saccharomyces cerevisiae grows a mating projection and alters in morphology from spherical to shmoo form. Although structural and compositional alterations of the cell wall accompany shape transitions, their impact on cell wall elasticity is unknown. In a combined theoretical and experimental approach using finite-element modelling and atomic force microscopy (AFM), we investigated the influence of spatially and temporally varying material properties on mating morphogenesis. Time-resolved elasticity maps of shmooing yeast acquired with AFM in vivo revealed distinct patterns, with soft material at the emerging mating projection and stiff material at the tip. The observed cell wall softening in the protrusion region is necessary for the formation of the characteristic shmoo shape, and results in wider and longer mating projections. The approach is generally applicable to tip-growing fungi and plants cells.

Medullary Structure of the Umbilicariaceae

1995 ◽  
Vol 27 (3) ◽  
pp. 189-199 ◽  
Author(s):  
Fernando Valladares ◽  
Leopoldo G. Sancho
Keyword(s):  
Cell Wall ◽  
Light Microscopy ◽  
Water Relations ◽  
Spatial Orientation ◽  
General Relationship ◽  
Homogeneous Layer ◽  
Intercellular Spaces ◽  
Relative Thickness ◽  
Hyphal Branching

AbstractThe medullary structure of 24 Umbilicariaceae species was studied by light microscopy. The objective was to investigate the variability of the medulla of these lichens and to assess the possible implications for thallus ecophysiology and the taxonomic relevance of the anatomy of this layer. Several methods of embedding, sectioning and staining together with the comparison of radial with transverse sections showed important differences in the degree of cohesion of hyphae and their spatial orientation within the medulla. Other important characteristics were the existence of more than one structurally homogeneous layer within the medulla, the frequency of hyphal branching, the relative thickness of the cell wall and lumen and the abundance of gelatinous matter in the intercellular spaces. The medullae studied were grouped into seven main types. The constancy of the types of medulla for certain groups of species makes it a useful secondary character to be considered in the taxonomy of the Umbilicariaceae. The important role of the structure of the medulla in the water relations of the Umbilicariaceae is discussed and a general relationship between medulla type and hydration strategy is suggested

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