Salinity-induced ion toxicity
noun phrasePronunciation: /səˈlɪnɪti ɪnˈdjuːst ˈaɪən ˈtɒksɪsɪti/
The phytotoxic damage caused by excessive accumulation of sodium and chloride ions in plant tissues, leading to enzyme inhibition, metabolic disruption, and cellular dysfunction. This damage occurs when salt uptake exceeds plant detoxification and compartmentalization capacity.
Plain English
Harmful effects on plants caused by too much salt accumulating in their tissues and interfering with normal functions.
Etymology & History
Usage
"Salinity-induced ion toxicity in barley leaves manifests as necrotic margins when Na+ concentration exceeds 500 mM in the vacuole."
Style guide notes: Distinguish from osmotic stress phase; refer to specific ion concentrations when quantifying toxicity severity.
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Related Terms
Frequently Asked Questions
Which ions cause the most damage in salt stress?
Sodium and chloride are primary culprits; they inhibit enzyme function and disrupt nutrient uptake when accumulated excessively.
How do salt-tolerant plants avoid ion toxicity?
They use selective transporters to exclude harmful ions, compartmentalize salts in vacuoles, and activate detoxification pathways.
Why Test Candidates on This?
Widely tested in halophyte physiology, irrigation management, and coastal agriculture stress assessments.
Required skill level: Mid