Ion toxicity
nounPronunciation: /ˈaɪən tɒkˈsɪsɪti/
The harmful accumulation of specific ions, particularly sodium and chloride, within plant tissues that exceeds physiological tolerance thresholds. Excessive ion concentrations disrupt cellular metabolism, enzyme function, and nutrient balance.
Plain English
Salt ions like sodium and chloride build up in plants to dangerous levels, poisoning cells and disrupting normal functions.
Etymology & History
Usage
"Ion toxicity from soil salinization limits crop production in arid and semi-arid agricultural regions."
Style guide notes: Specify which ions are involved in toxicity discussions, as different plant species show variable sensitivity to different ionic species.
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Frequently Asked Questions
Which ions cause the most plant toxicity?
Sodium and chloride ions are primary toxins in saline conditions, though boron, manganese, and aluminum also cause species-specific toxicity.
How do plants prevent ion toxicity?
Plants exclude harmful ions through selective root transporters or compartmentalize them in vacuoles to isolate them from sensitive cytoplasmic enzymes.
Why Test Candidates on This?
Important for understanding salt-stress physiology and managing crop production in saline soils.
Required skill level: Mid