1961
DOI: 10.1104/pp.36.3.331
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Diffusion of tritiated water into roots as influenced by water status of tissue

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Cited by 14 publications
(6 citation statements)
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“…There has been some speculation (Slatyer, 1967) that the initial effects of WS (such as decreased turgor) might reduce compression between adjacent cell walls; this would consequently increase the permeability of apoplastic water movement. This hypothesis was supported by the earlier observation that WS-roots displayed enhanced water isotopic exchanges (Ordin and Gairon, 1961). Furthermore, there is evidence that actual cell membrane permeability to water may be increased at low turgor levels (Zimmerman and Steudle, 1974;Steudle and Zimmerman, 1974).…”
Section: Ws-indueed Permeabilitymentioning
confidence: 73%
“…There has been some speculation (Slatyer, 1967) that the initial effects of WS (such as decreased turgor) might reduce compression between adjacent cell walls; this would consequently increase the permeability of apoplastic water movement. This hypothesis was supported by the earlier observation that WS-roots displayed enhanced water isotopic exchanges (Ordin and Gairon, 1961). Furthermore, there is evidence that actual cell membrane permeability to water may be increased at low turgor levels (Zimmerman and Steudle, 1974;Steudle and Zimmerman, 1974).…”
Section: Ws-indueed Permeabilitymentioning
confidence: 73%
“…It is possible that the diffusion coefficient of THO may be altered near the root apex in this plant material. From studies on root sections, Ordin and Gairon (7) showed that the diffusion coefficient for THO in Vicia and Zea roots varied between 5 andl 20 % of the value reported by Wang et al (10) for the free-diffusion coefficient of THO in HHO.…”
Section: Discussionmentioning
confidence: 99%
“…Ordin and Gairon (7) have studied the effect of osmotic substrate on the diffusion rate of tritiated water into root sections of Vicia and Zea. They found that while osmotic stress administered with mannitol had no effect on the equilibration of tritiated water in Zea an enhancement was observed in Vicia roots.…”
Section: Movement Of Tritiatedmentioning
confidence: 99%
“…Thus, a fivefold increase in Rim, with the remaining variables constant, would only double the value of D. Even if 2=0.99 Fin, the value of D would be increased by a factor of less than 2. In our experiments with barley, although some of the la- Viciafaba root segments (Ordin & Gairon, 1961) 1.8…”
Section: Application Of the Model System To Plant Rootsmentioning
confidence: 98%
“…These investigations have included studies on plant roots to elucidate the pathways of radial movement of water and the location of the tissues presenting major resistance (Ordin & Gairon, 1961;Woolley, 1965;Raney & Vaadia, 1965;Ginsburg & Ginzburg, 1970a). Radial diffusion across the roots of intact plants to or from the conducting tissues is difficult to study since the xylem is not directly accessible to measurements; this consideration has prompted the use of detached roots or preparations derived from them (e.g.…”
mentioning
confidence: 99%