Aquaporins
nounPronunciation: /ˈækwəpɔːrɪnz/
Water channel proteins embedded in cell membranes that facilitate rapid, selective transport of water molecules across membranes in response to osmotic gradients. They play critical roles in maintaining water balance and hydraulic conductance during stress conditions.
Plain English
Protein channels in cell membranes that control how quickly water moves in and out of plant cells.
Etymology & History
Usage
"Overexpression of root aquaporins enhanced water uptake efficiency and improved drought tolerance in transgenic wheat."
Style guide notes: Specify aquaporin subfamily (PIP for plasma membrane, TIP for vacuolar) when discussing specific transport functions.
Also known as
Related Terms
Frequently Asked Questions
How do aquaporins help plants survive water stress?
They regulate rapid water movement into roots and cells, enabling plants to exploit available water efficiently.
Are aquaporins regulated during stress conditions?
Yes, aquaporin expression and activity are modified by osmotic stress, cold, and dehydration to optimize water relations.
Why Test Candidates on This?
Advanced topic relevant for molecular stress physiology and biotechnology approaches to stress tolerance improvement.
Required skill level: Senior