Stomata of the Moses in the Cradle Plant

Assalamualaikum wbt and have a good day.

I always tried to find time to starts blogging early every year, and I always find a reason to start late. As soon as remember my sifu, Prof. Nurulhuda once told me that blogging need to be consistent otherwise I would be overwhelming; I start bloging.

The pandan ungu as the model in this pic.  

                       
Moses in the Cradle Plant (Tradescantia spathacea) or locally known as Pandan Ungu  is the plant that is suggested for the science activity to study the gaseous exchange in plants.

To observe the structure of stoma under a microscope and be able to explain:

1. A stomatal pore is controlled by two guard cells.

2. During the day, water enters the guard cells by osmosis, causing them to become turgid and open the stomatal pore.

3. The diffusion of carbon dioxide takes place due to the difference in concentration of gas.

4. During the hot days, water is lost from the guard cells through osmosis causing the stomatal pore to close.

Throughout this activity, I find that students had enjoyed and love observing the stomata under the microscope especially when smartphone is used to magnify the image form by the microscope and capture / record those image.















Next, the students soak different types of leaves in boiling water to observe the gas released from its surface.

The stomata released air bubbles or gelembung udara (Not buih! 😅). Using the smartphone lens to magnify the image of the air bubble is almost impossible with our naked eyes.

So teachers, use your smartphone lens to the fullest.

 

Report by the students in their activity book