Apoplastic barrier integrity
nounPronunciation: /ˌæpəˈplæstɪk ˈbæriə ɪnˈtɛɡrɪti/
The structural and functional continuity of extracellular pathways including cell walls and intercellular spaces that regulate solute transport and water movement in plants. Stress-induced degradation of this barrier compromises selective uptake and retention of minerals.
Plain English
The strength and completeness of plant cell wall structures that control what enters and exits cells.
Etymology & History
Usage
"Loss of apoplastic barrier integrity under salt stress permitted uncontrolled ion influx into root cells."
Style guide notes: Distinguish apoplastic from symplastic pathways; use 'apoplast' as noun, 'apoplastic' as adjective.
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Related Terms
Frequently Asked Questions
What components form the apoplastic barrier?
Cell walls, intercellular spaces, and plasmodesmatal connections create this barrier system.
How does salt stress affect apoplastic barrier integrity?
High salinity can degrade cell wall polysaccharides, compromising selective solute uptake.
Why Test Candidates on This?
Important for understanding ion transport mechanisms and salinity stress responses in advanced plant physiology.
Required skill level: Senior