Abstract
The accumulation of nitrogen and potassium by plant cells at undesirable concentrations manifests itself in changes in the osmotic phenomenon and finally in the transport process. Temperature gradient is another factor influencing the transport phenomenon. We have followed the changes in the electric diffusion potential and the heat transfer under the influence of these two factors on transport properties of roots of plants grown under conditions of either salinity or nutrient deficiency on the transport of KG solution through segments of the first node roots and of the primary root. Physical causes of the accumulation of the above mentioned ions were then studied by means of a mathematical model. The results obtained showed that high KNO3 concentration in nutrient solution caused an inhibition of volume and heat flows, stimulated osmotic flow, and reduced electrical polarization of root cells. Cell polarization was slowed down when temperature gradient was increasing and enhanced when temperature gradient was decreasing. This indicates that the pressure difference between the exterior and the interior of root cells was levelled off by osmotic water flow but not by potassium ion flow.
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Claims 7
Claim · model-written summary
High KNO3 inhibited root volume flow.
Zea maysNot reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“maize plants”
e0“high KNO3 concentration in nutrient solution caused an inhibition of volume and heat flows”
Claim · model-written summary
High KNO3 inhibited root heat flow.
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“maize plants”
e0“high KNO3 concentration in nutrient solution caused an inhibition of volume and heat flows”
Claim · model-written summary
High KNO3 stimulated osmotic flow.
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“maize plants”
e0“high KNO3 concentration in nutrient solution caused an inhibition of volume and heat flows, stimulated osmotic flow”
Claim · model-written summary
High KNO3 reduced electrical polarization of root cells.
- Treatment
- high KNO3 concentration in nutrient solutione0
- Outcome
- electrical polarization of root cellse0
- Direction
- reducede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“maize plants”
e0“high KNO3 concentration in nutrient solution caused an inhibition of volume and heat flows, stimulated osmotic flow, and reduced electrical polarization of root cells”
Claim · model-written summary
Increasing temperature gradient slowed cell polarization.
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“maize plants”
e0“Cell polarization was slowed down when temperature gradient was increasing”
Claim · model-written summary
Decreasing temperature gradient enhanced cell polarization.
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“maize plants”
e0“Cell polarization was slowed down when temperature gradient was increasing and enhanced when temperature gradient was decreasing”
Claim · model-written summary
The authors infer that osmotic water flow levelled the pressure difference across root cells.
- Outcome
- pressure difference between the exterior and the interior of root cellse0
- Qualifier
- osmotic water flowe0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“maize plants”
e0“the pressure difference between the exterior and the interior of root cells was levelled off by osmotic water flow but not by potassium ion flow”
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