Question

can you explain about c3, c4 and CAM plant ?

Answer 1

C3 plants are your regular everyday plants, they open their stomata during the day to breathe in CO2 and release O2. they go through the light and dark reactions normally because they are not exposed to extremely hot conditions. C4 plants and CAM plants have devised ways to overcome the rough environment.

Answer 2

C4 plants have 2 separate cells, mesophyll cells and bundle sheath cells. C4 plants use this method to combat photorespiration, which is when the plants breakdown glucose to form CO2 instead building glucose from CO2 and releasing O2. the CO2 enters the mesophyll cell, and PEP (phosphoenolpyruvate) carboxylase binds the CO2 to PEP to produce a 4 carbon compound. PEP carboxylase has no affinity for O2, unlike rubisco, which is why it will bind with the CO2 instead of the O2 in the plant. so the 4 carbon compound (could be oxaloacetate, malate) is then transferred through plasmodesmata to the bundle sheath cells, where it is broken down to CO2 and pyruvate. and the CO2 enters the calvin cycle to produce glucose. the pyruvate is then sent back to the mesophyll cells and with the use of ATP is converted to back to PEP so that it can combine with more CO2.

Answer 3

CAM plants also developed because of photorespiration. the difference between CAM and C4 is that CAM plants have only one cell, and they they open their stomata at night and close them during the day. the CO2 they take in at night is incorporated into 4 carbon compounds (organic acids) and is sent off to the calvin cycle during the day to make glucose. CAM plants are usually found in dry desert areas.

Answer 4

it is just wikepedia :)

Answer 5

i haven't learnt about this yet .. but just wanted to help aikay with something ;)

Answer 6

http://finedrafts.com/files/campbellbio9th/CH%2010%20Photosynthesis.pdf
or
http://finedrafts.com/files/Beckers%20World%20of%20Cell/CH11%20Metabolism%20-%20Photosynthesis.pdf