Question:
Lundegardh's Cytochrome pump theory believed that there was a definite correlation between
Lundegardh's Cytochrome pump theory believed that there was a definite correlation between
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Lundegårdh's theory is also known as the "Anion Respiration Theory".
This name directly highlights the link between respiration and anion absorption.
This name directly highlights the link between respiration and anion absorption.
Updated On: Jul 6, 2026
- Photosynthesis and anion absorption
- Respiration and anion absorption
- Photosynthesis and cation absorption
- Respiration and cation absorption
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The Correct Option is B
Solution and Explanation
Step 1: Understanding the Concept:
Lundegårdh's Cytochrome Pump Theory (proposed by Lundegårdh and Burström in 1933) is a classical physiological model explaining active ion absorption by plant roots.
Step 3: Detailed Explanation:
The core tenets of Lundegårdh's theory are:
1. The absorption of anions and cations is independent.
2. Anions are actively absorbed via a cytochrome system, which acts as an electron/ion carrier.
3. This active transport is directly coupled to respiration, specifically referred to as "salt respiration" or "anion respiration".
4. The rate of respiration increases significantly when roots are exposed to salt solutions, showing a direct correlation between active respiration and anion uptake.
5. Cations are absorbed passively along the electrical gradient created by the active transport of anions.
Therefore, the theory establishes a definite correlation between respiration and anion absorption.
Step 4: Final Answer:
The correct correlation is between respiration and anion absorption, making option (B) the correct choice.
Lundegårdh's Cytochrome Pump Theory (proposed by Lundegårdh and Burström in 1933) is a classical physiological model explaining active ion absorption by plant roots.
Step 3: Detailed Explanation:
The core tenets of Lundegårdh's theory are:
1. The absorption of anions and cations is independent.
2. Anions are actively absorbed via a cytochrome system, which acts as an electron/ion carrier.
3. This active transport is directly coupled to respiration, specifically referred to as "salt respiration" or "anion respiration".
4. The rate of respiration increases significantly when roots are exposed to salt solutions, showing a direct correlation between active respiration and anion uptake.
5. Cations are absorbed passively along the electrical gradient created by the active transport of anions.
Therefore, the theory establishes a definite correlation between respiration and anion absorption.
Step 4: Final Answer:
The correct correlation is between respiration and anion absorption, making option (B) the correct choice.
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