Introduction: Understanding Stomata and Lenticels
Plants rely on specialised structures for gas exchange and respiration. Two primary apertures involved in this process are stomata and lenticels. These openings, although derived from the same embryological tissue, differ in their location, structure, and function.
In this article, we will explore the differences between Stomata and Lenticels.
Key Differences Between Stomata and Lenticels
What are Stomata?
Stomata (singular: stoma) are microscopic openings primarily found on the surface of leaves, young stems, and roots. These tiny pores facilitate the exchange of gases, including carbon dioxide (CO₂), oxygen (O₂), and water vapor. Stomata are controlled by guard cells, which regulate their opening and closing based on environmental conditions.
What are Lenticels?
Lenticels are small, lens-shaped openings present on the bark of stems, roots, and some fruits. Unlike stomata, which open and close, lenticels remain open to ensure continuous gas exchange, especially in woody plants.
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FAQs on Differentiate Between Stomata and Lenticels - Functions & Importance
1. What is the main difference between stomata and lenticels?
Stomata are microscopic pores that regulate gas exchange in leaves, while lenticels are permanent openings found on stems and woody structures.
2. How do stomata function in plant respiration?
Stomata open to allow CO₂ intake for photosynthesis and close to minimise water loss.
3. Why are lenticels always open?
Lenticels remain open to facilitate continuous gas exchange, as woody structures cannot use stomata for respiration.
4. Can lenticels be found on leaves?
No, lenticels are typically found on stems, roots, and certain fruits, not on leaves.
5. Do all plants have lenticels?
No, lenticels are primarily found in woody plants.
6. How do stomata regulate water loss?
Stomata open and close in response to environmental conditions, helping plants control transpiration.
7. What is the role of guard cells in stomata?
Guard cells regulate the opening and closing of stomata based on water availability and environmental factors.
8. Are lenticels present in herbaceous plants?
Lenticels are mostly found in woody plants; they are rare in herbaceous plants.
9. Can stomata function in the absence of guard cells?
No, stomata require guard cells to regulate their opening and closing.
10. How do lenticels help in plant respiration?
Lenticels provide a continuous passage for gas exchange, ensuring oxygen supply to internal plant tissues.
