Ion homeostasis
noun phrasePronunciation: /ˈaɪən ˌhoʊmiəʊˈsteɪsɪs/
The maintenance of optimal intracellular ion concentrations and compartmentalization despite external ionic stress, particularly salt stress. This involves selective uptake, transport, and sequestration of ions to prevent cytotoxicity.
Plain English
How plants maintain proper salt and mineral balance inside cells to prevent damage from excess salts.
Etymology & History
Usage
"Ion homeostasis was disrupted in plants exposed to high sodium concentrations, reducing biomass accumulation."
Style guide notes: Use 'ion homeostasis' rather than 'ionic homeostasis' in technical writing for consistency with plant physiology literature.
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Related Terms
Frequently Asked Questions
How do plants achieve ion homeostasis under salt stress?
Through selective ion transporters and vacuolar sequestration that prevent cytoplasmic ion accumulation.
Why is ion homeostasis critical for salinity tolerance?
Excessive intracellular ions cause enzyme inhibition and cellular damage; homeostasis prevents this toxicity.
Why Test Candidates on This?
Critical assessment criterion in salinity stress research and crop improvement programs evaluating ionic stress tolerance.
Required skill level: Mid