Stomatal density
nounPronunciation: /ˈstəʊmətəl ˈdensɪti/
The number of stomate structures per unit leaf area, typically expressed as stomata per mm² of leaf surface, which influences the plant's photosynthetic capacity and water loss potential. Stomatal density is an adaptive trait that varies among species and can be modified by environmental conditions during leaf development.
Plain English
The number of tiny leaf pores per unit area of leaf surface that control gas and water vapor exchange.
Etymology & History
Usage
"Drought-adapted plant species often exhibit lower stomatal density as a water-conservation adaptation compared to mesic species."
Style guide notes: Always specify the measurement unit (stomata/mm²) and leaf surface (adaxial vs. abaxial) when reporting stomatal density values.
Also known as
Contrasted with
Related Terms
Frequently Asked Questions
How does environmental stress affect stomatal density?
High CO₂ and water stress during leaf development typically reduce stomatal density in developing leaves.
Why is stomatal density important for crop breeding?
Optimal stomatal density balances photosynthetic capacity with water-use efficiency, making it valuable for drought-tolerant crop selection.
Why Test Candidates on This?
Frequently assessed in plant morphology and stress adaptation studies, particularly relevant for crop improvement research.
Required skill level: Junior