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Closed Access item lon Homeostasis in NaCl Stress Environments.
Bressan, Ray A.
Hasegawa, Paul M.
Pardo, José M.
|Publisher:||American Society of Plant Biologists|
|Citation:||Plant Physiology: 109: 735-742 (1995)|
|Abstract:||Homeostasis can be defined as the tendency of a cell or
an organism to maintain interna1 steady state, even in
response to any environmental perturbation or stimulus
tending to disturb normality, because of the coordinate responses of its constituent components. Typically, ions
constantly flux in and out of cells in a controlled fashion with net flux adjusted to accommodate cellular requirements,
thus creating an ionic homeostasis. When plant cells
are exposed to salinity, mediated by high NaCl concentrations,
kinetic steady states of ion transport for Na+ and C1-
and other ions, such as Kt and Ca2+, are disturbed (Binzel
et al., 1988). High apoplastic levels of Na+ and C1- alter
aqueous and ionic thermodynamic equilibria, resulting in
hyperosmotic stress, ionic imbalance, and toxicity. Thus, it
is vital for the plant to re-establish cellular ion homeostasis
for metabolic functioning and growth, that is, to adapt to
the saline environment.|
|Description:||8 páginas, 1 tabla, 1 figura, 61 referencias. This is journal
article No. 14,705 from the Purdue Agricultura1 Experiment
|Publisher version (URL):||http://www.ncbi.nlm.nih.gov/pmc/articles/PMC161372/pdf/1090735.pdf|
|Appears in Collections:||(IRNAS) Artículos|
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