Apoplastic barrier function
nounPronunciation: /ˌæpəˈplæstɪk ˈbæriər ˈfʌŋkʃən/
The structural and biochemical integrity of the apoplast (cell wall and intercellular spaces) that restricts pathogen entry and uncontrolled solute movement under stress conditions. Compromised apoplastic barriers increase vulnerability to pathogens and osmotic stress.
Plain English
The plant's cell walls and spaces between cells that act as a protective barrier to keep harmful substances and pathogens out.
Etymology & History
Usage
"Salt stress compromised the apoplastic barrier function, leading to increased pathogenic colonization."
Style guide notes: Use 'apoplastic' as adjective; specify cell-wall components when discussing specific barrier mechanisms.
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Related Terms
Frequently Asked Questions
What comprises the apoplastic barrier?
Cell walls, cuticle, and various antimicrobial compounds including suberin, lignin, and proteins.
How does stress affect apoplastic barrier function?
Environmental stress can weaken cell wall integrity and reduce antimicrobial compound production.
Why Test Candidates on This?
Relevant for integrated stress biology and pathophysiology assessments examining multi-stress interactions.
Required skill level: Senior