Plant Electron transport

[Dr Kdog]

I'm a little confused with plant respiration. Is it correct to say that plants use photosynthesis to create glucose and oxygen, and then use that to power glycolysis, kreb's cycle, and the electron transport chain to make ATP? Meaning they both photosynthesize AND respire? Any help would be appreciated 🙂

 

[Riz0791]

Plants produce glucose and O2 via photosynthesis (cyclic/noncyclic photophosphorylation and calvin cycle) from H2O, CO2, light energy. The O2 and glucose that plants make during photosynthesis is used by animals during cellular respiration (glycolysis, krebb's cycle, electron transport chain) to make ATP, CO2 and H20.

 

[Jordwin]

Its opposite in plants. Plants use energy from the electron transport chain to make ATP and nadph first. They then use that energy + carbon dioxide to make glucose and other sugars through the Calvin cycle.

The electron transport chain in plants is the cyclic or non cyclic cycles. The cyclic only generates ATP and the non cyclic generates ATP and nadph.

The electrons from the etc come from the splitting of water. The electrons go through the etc and the oxygen is a byproduct.

 

[SafetyDog]

Neither of the above two answered your question I don't think.

But yes, plants have mitochondria and use the glucose from photosynthesis meaning that they both photosynthesize and respire.

Ex. Glucose may be transported to other parts of the plant where via the phloem photosynthesis does not occur. Here, the glucose can be used via respiration.

This is especially true at night since ATP is not made from photosynthesis. Thus, energy must come from somewhere else.