In respiration, energy of oxidation reduction is utilised for the production of proton gradient required for phosphorylation.

Answer

### Step-by-Step Solution:

1. **Understanding Respiration**: Respiration in plants involves a series of biochemical reactions that convert glucose and oxygen into energy (ATP), carbon dioxide, and water. This process can occur aerobically (with oxygen) or anaerobically (without oxygen).

2. **Role of Electron Transport Chain (ETC)**: In aerobic respiration, the electron transport chain plays a crucial role. Electrons are transferred through a series of protein complexes (Complex I to Complex IV) in the inner mitochondrial membrane. This transfer is coupled with the pumping of protons (H+) from the mitochondrial matrix into the intermembrane space, creating a proton gradient.

3. **Formation of Proton Gradient**: The energy released during the oxidation-reduction reactions in the electron transport chain is used to pump protons across the membrane. This creates a higher concentration of protons in the intermembrane space compared to the matrix, resulting in a proton gradient.

4. **Phosphorylation Process**: The proton gradient generated during respiration is essential for ATP synthesis. Protons flow back into the mitochondrial matrix through ATP synthase, a protein complex that uses this flow to convert ADP and inorganic phosphate into ATP. This process is known as oxidative phosphorylation.

5. **Role of Oxygen**: Oxygen acts as the final electron acceptor in the electron transport chain. It combines with electrons and protons to form water. This step is crucial as it helps maintain the flow of electrons through the chain and ensures the continuation of the proton gradient.

6. **Conclusion**: The statement in the question is correct. The energy from oxidation-reduction reactions is indeed utilized to produce the proton gradient necessary for phosphorylation (ATP production) during respiration.