Exploring Stomata and Guard Cells Stomata singular form

Exploring Stomata and Guard Cells

Stomata (singular form= “stoma”)

Stomata �Stomata are microscopic holes in a plant leaf These holes are located on the underside of the leaf

The stomata are the openings

Role of the Stomata �Stomata allow gases such as CO 2 and oxygen to enter and leave the plant �Additionally, these structures regulate the movement of water in and out of the leaf

Why is the stomata important? �Plants need to take in CO 2 for the process of photosynthesis �Additionally, plants need to regulate water loss Plants that do not keep enough water in their cells wilt and die

Wilted plants

Guard Cells

Guard Cells �Guard cells are the cells located around the stoma of the plant leaves

The guard cells are the two flaps that surround the stoma

Role of Guard Cells �Guard cells regulate the opening and closing of the stomata

Why are guard cells important? �Guard cells help control how much CO 2 and water will enter the leaf These are both key ingredients for photosynthesis to occur �They also allow oxygen to exit �Lastly, the guard cells help maintain water homeostasis Guard cells will close when water is limited

Challenge Yourself!! �Explain the phenomenon occurring below. Need a hint? Think about these questions What is each picture illustrating? What is different about each picture? What’s similar? What could explain the difference that you see?