This tutorial examines the biochemical pathway of carbon fixation by the enzyme RuBisCO, as well as modifications of this fixation. Since RuBisCO can fix oxygen as well, we have a process called photorespiration occuring. The most common comment is that it is wasteful, but a deeper look into plant physiology shows that there are some real benefits to it. Plants get the carbon dioxide they need for the Calvin Cycle from the air - which means they need to open their stomata. Plants in water stressed environments have evolved remarkable ways on continuing to fix carbon while reducing water loss through transpiration: C4 and CAM photosynthesis.
Source: M. O'Mahony, open source images, other references at the end of the slides.
References to update information on the advantages of photorespiration in C3 plants.
Source: as on slide
Notes Template for the Students that complements the screencast for this lesson.
Source: M. O'Mahony
You worked through the first 3 "scenes" of this animation in the previous tutorial.
The 4th scene is on the Calvin Cycle. This is followed by a clear summary of the big picture of photosynthesis.
Source: MdGraw - Hill online
This animation explains the Calvin Cycle using three phases - as you will be learning in class.
Source: Smith, Bio231 course
Here is a really nice - and clear - summary of the Calvin Cycle: http://ed.ted.com/lessons/nature-s-smallest-factory-the-calvin-cycle-cathy-symington
Source: Ted-Ed Cathy Symington
A reminder that you need an account on Spongelab to access the resources. It is free to set up an account.
Search: Calvin Cycle, then look under "Games and Simulations".
Rubisco was the molecule of the month for November 2000 in the RCSB Protein Data Bank.
Source: David Goodsell & RCSB Protein Data Bank
The Nobel Prize in Chemistry 1961
Prize share: 1/1
The Nobel Prize in Chemistry 1961 was awarded to Melvin Calvin"for his research on the carbon dioxide assimilation in plants".
Source: The Nobel Prize in Chemistry 1961". Nobelprize.org. Nobel Media AB 2014. Web. 14 Nov 2014.
This animation (option of narration) overviews the Calvin-Benson Cycle and its link to the Light Reactions of Photosynthesis. Then, it explains how, starting in the mid-1940's, the researchers used 14C to work out the sequence of the compounds of the cycle.
Source: WH Freeman online
This video demonstrates how the concept of photosynthesis was discovered.
Source: Discovery Channel, YouTube