Apoplastic water movement restriction
nounPronunciation: /ˌæpəˈplæstɪk ˈwɔtər ˈmuːvmənt rɪˈstrɪkʃən/
The impediment of water transport through intercellular spaces and cell walls under stress conditions due to increased cell wall hydrophobicity or suberization. This restriction forces water into the symplastic pathway and affects water redistribution patterns throughout the plant.
Plain English
The blocking of water flow through the spaces between plant cells, forcing water to move through cell interiors instead.
Etymology & History
Usage
"Apoplastic water movement restriction was observed in salt-stressed barley roots, indicating enhanced endodermis suberization."
Style guide notes: Always specify anatomical location (endodermis, exodermis) when discussing apoplastic restriction mechanisms.
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Frequently Asked Questions
Why does the apoplast restrict water movement under stress?
Plants increase suberin deposition and wax accumulation in cell walls, reducing water permeability through intercellular spaces.
What is the consequence of apoplastic restriction?
Water flows preferentially through symplastic routes, allowing better control of water distribution and nutrient selectivity.
Why Test Candidates on This?
Important for understanding salt stress and water uptake mechanisms, particularly in root anatomical adaptation studies.
Required skill level: Senior