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Meychik, N. R.; Yermakov, I. P.

doi:10.1023/a:1017936318435

Cited by 112 publications

(23 citation statements)

References 11 publications

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“…2) indicated that tomato cells subjected to increasing Zn concentrations tend to compartmentalize this metal ion preferentially within cell walls rather than within intracellular soluble fractions. It is well known that Zn is required as an Table 2 Cell wall biomass productivity for cells exposed to increased concentration of Zn in medium for 4 days (from day 7 to 11) essential co-factor of a number of cytoplasmic enzymes (Marschner 1995). Its influx can be driven by plasma membrane transporter such as ZNT1 (a Zn/Cd transporter) expressed in both hyperaccumulator and non-accumulator plants (Klein et al 2008).…”

Section: Discussionmentioning

confidence: 99%

“…Some of them, like copper and zinc, are required as micronutrients in biological systems as co-factors and/or part of prosthetic groups of enzymes involved in various metabolic pathways. At higher concentrations, however, these elements exhibit strong toxicity the same way as heavy metals such as Cd or Pb which otherwise do not benefit plant metabolism even at very low concentration (Marschner 1995;Rout and Das 2003;Prasad 2004).…”

Section: Introductionmentioning

confidence: 99%

“…This metal ion is easily assimilated by plants but it can also prove strongly phytotoxic (Broadley et al 2007). Growth inhibition is a general phenomenon associated with Zn toxicity (Marschner 1995;Hagemeyer 2004). However, plants exhibit a variety of responses in reaction to stresses generated by zinc or other trace element.…”

Section: Introductionmentioning

confidence: 99%

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Response of cultured tomato cells subjected to excess zinc: role of cell wall in zinc compartmentation

2009

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International audienceThe aim of this preliminary study was to evaluate the role of the cell wall in Zn accumulation and tolerance by tomato suspension-cultured cells. Growth parameters, Zn distribution and accumulation by tomato cells were determined in function of zinc concentration. A particular attention was paid to the variations of the total cell wall material (cell wall carbohydrates, proteins, and exopolymers) in relation to extracellular levels of Zn. Cells treated with 0.5-5 mM Zn showed typical symptoms of heavy metal toxicity as testified by various growth parameters. Fresh and dry weights as well as total cell volume per vial decreased with increasing Zn concentration in the culture medium. Concurrently, the cell wall biomass increased, as well as the Zn amount retained by cell wall polymers. Cell wall appeared to assume important roles in Zn fixation and could therefore limit Zn influx into the cell. Our results also suggested that zinc fixation by cell wall was not only due to an increase in cell wall biomass but also to an improvement of its binding capacity

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Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Response of cultured tomato cells subjected to excess zinc: role of cell wall in zinc compartmentation

2009

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“…There can be several types of such groups of varied proton binding strengths e.g. amine, carboxyl, phenolic, phosphate [4] [5] [17]. The dissociation of such surface groups, SG, can be described by two general reactions:…”

Section: Evaluation Of Surface Charge Of Rootsmentioning

confidence: 99%

Pitfalls and Uncertainties of Using Potentiometric Titration for Estimation of Plant Roots Surface Charge and Acid-Base Properties

Józefaciuk¹,

Szatanik-Kloc²,

Lukowska³

et al. 2014

AJPS

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Amount and properties of roots surface charge are important for nutrient uptake and balance in plants. Roots surface charge markedly varies at different rizosphere conditions (particularly pH and ionic strength), which can markedly alter during vegetation season. Among recently available measuring methods, surface charge-pH dependence of roots (as well as other biological objects) is most easily evaluated by potentiometric titration. Use of this method is also easy at different ionic strengths. Potentiometric titration also allows for estimation of the distribution of charge generating surface groups. However, many applications of this method seem to be based either on incorrect methodical or theoretical approaches. In this paper we discuss the methodical and theoretical backgrounds of the titration method. Basing on experimental titration curves of roots of barley grown in nutrient solution, we show inconsistency of surface charge results obtained at different measuring conditions. Limitations of theoretical interpretations of the results are outlined also.

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“…& Grzegorz Józefaciuk jozefaci@ipan.lublin.pl back-titration method (Meychik and Yermakov 2001;Nederlof et al 1993). Since drought stress affects roots growth and development (Blum 1996), we also studied the roots length distributions to provide the biometric background of the plants reaction on the applied stressing conditions.…”

Section: Introductionmentioning

confidence: 99%

Osmotic stress induces severe decrease in cation exchange capacity and surface groups of medium acidity in roots of cereal plants

Lukowska

Józefaciuk

2016

Acta Physiol Plant

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Huge amount of information on the plants response to drought is available throughout the literature; however, extremely rare information concerns effects of limited water availability on cation exchange capacity (CEC) and surface acidity of plant roots despite their importance for cations uptake by plants. As it is known, the CEC and acidity of barley roots markedly decrease under a low soil moisture and osmotic stresses, so we studied the behavior of the other cereal plants. Surface charge properties of roots of wheat, triticale, rye, oats and barley grown in hydroponics under osmotic stress induced at tillering stage by various mannitol concentrations were determined using a back-titration method. Roots size distributions were measured also. The osmotic stress caused down to a fivefold decrease in the CEC and a twofold decrease in the relative amount of surface functional groups of medium acidic strength, whereas no well-defined trends were observed for surface acidity. The above changes were the highest for rye and the lowest for oats. The general root's architecture remained roughly same; however,' the roots length markedly decreased under stress. The smallest decrease in roots length was observed for barley. Decrease in CEC and roots length may be the primary reasons for severe limitation in nutrient uptake by plants during drought.

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Cited by 112 publications

References 11 publications

Response of cultured tomato cells subjected to excess zinc: role of cell wall in zinc compartmentation

Response of cultured tomato cells subjected to excess zinc: role of cell wall in zinc compartmentation

Pitfalls and Uncertainties of Using Potentiometric Titration for Estimation of Plant Roots Surface Charge and Acid-Base Properties

Osmotic stress induces severe decrease in cation exchange capacity and surface groups of medium acidity in roots of cereal plants

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