Ca, Mg, Cu and K deficiency leads to

Options

A. Chlorosis in leaf tissue
B. Necrosis or death of host tissue
C. Delayed flowering
D. Stunted growth

Answer

To address the question regarding the deficiencies of calcium (Ca), magnesium (Mg), copper (Cu), and potassium (K), we will analyze the effects of these deficiencies step by step.

### Step-by-Step Solution:

1. **Identify the Nutrients**:
- Calcium (Ca)
- Magnesium (Mg)
- Copper (Cu)
- Potassium (K)

2. **Understand the Role of Each Nutrient**:
- **Calcium**: Essential for cell wall stability and structure; involved in cell division and growth.
- **Magnesium**: Central component of chlorophyll; important for photosynthesis and enzyme activation.
- **Copper**: Plays a role in photosynthesis, respiration, and the formation of lignin in cell walls.
- **Potassium**: Regulates osmotic pressure, enzyme activation, and is crucial for photosynthesis and protein synthesis.

3. **Effects of Deficiency**:
- When any of these nutrients are deficient, plants exhibit specific symptoms.
- Calcium deficiency can lead to necrosis (death of plant tissue) and poor root development.
- Magnesium deficiency can cause chlorosis (yellowing of leaves) and leaf curling.
- Copper deficiency can result in wilting and dieback of shoots.
- Potassium deficiency can lead to weak stems, poor fruit quality, and necrosis.

4. **Common Symptoms of Deficiencies**:
- The combined deficiency of Ca, Mg, Cu, and K can lead to severe issues in plant health, primarily resulting in tissue death or necrosis.
- This is because these nutrients are vital for various physiological processes and structural integrity of plant tissues.

5. **Conclusion**:
- Therefore, the deficiency of calcium, magnesium, copper, and potassium leads to necrosis or death of host tissue in plants.

### Final Answer:
Ca, Mg, Cu, and K deficiency leads to necrosis or death of host tissue.

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