Original video: https://youtu.be/ckiJ_go8IaU
Delivered on: 18 DEC 2023
Crassulacean Acid Metabolism (CAM) is a specialised form of photosynthesis that some plants have developed as an adaptation to arid and semiarid environments. This process is named after the Crassulaceae family of plants, where it was first observed, but it is not exclusive to this family. Unlike C3 and C4 plants, CAM plants open their stomata at night to take in CO2, which is converted to malate and stored. During the day, the stomata close to reduce water loss, and the stored malate is broken down to release CO2 for the Calvin cycle. This temporal separation of CO2 uptake and fixation allows CAM plants to thrive in hot, dry conditions. Some CAM plants are facultative, meaning they can switch between CAM and C3 photosynthesis depending on environmental conditions.
Video Timestamps:
00:00 Carbon fixation in plant
2:19 Crassulacean Acid Metabolism (CAM)
8:20 4-phase CAM
19:50 Different mechanisms regulate C4 PEPcase and CAM PEPCase
22:09 CAM is a versatile mechanism sensitive to environmental stimuli
28:20 Summary
28:40 Comparison C3, C4, CAM
31:40 Quiz time
46:25 Quantify the measurement of the leaf through the image. Can also refer to https://youtu.be/Fy56p6mVyVY
46:30 Installing ImageJ -ImageJ.net, pick 64-bit
52:50 Insert picture in ImageJ Drag and drop pictures from the folder into the apps
56:02 Set scales
59:30 Obtaining measurement Press M on the keyboard
1:02:14 Outlining the leaf To focus on one leaf only
1:06:18 Removing unwanted parts outside of the outline
1:08:45 Obtaining other parameters
1:11:00 Measuring the greenness of the leaf.
1:15:56 Transferring data to Excel
1:19:10 Calculating the diseased area of the leaf using Excel
1:20:45 Result Area, length, width, greenness, diseased area
Keywords: C3 photosynthesis, C4 photosynthesis, CAM photosynthesis, photosynthesis pathways, plant physiology, carbon fixation, photorespiration, stomata, chloroplasts, rubisco, PEP carboxylase, malate, bundle sheath cells, mesophyll cells, temporal separation, constitutive CAM
Location:
Faculty of Agriculture, Universiti Putra Malaysia
Fakulti Pertanian, Universiti Putra Malaysia, 43000 Seri Kembangan, Selangor
XPMM+9J Seri Kembangan, Selangor
2.9845517506267742, 101.73803356324866
Attribution 4.0 International — CC BY 4.0 - Creative Commons
Comments