Death of leaf tissues in plants is caused by deficiency of

Options

A. Ca and Mg
B. Zn and S
C. Mo and S
D. Mo and C

Answer

To solve the question regarding the death of leaf tissues in plants caused by nutrient deficiency, we can follow these steps:

### Step-by-Step Solution:

1. **Understand the Concept of Necrosis**:
- Necrosis refers to the death of plant tissues, specifically leaf tissues in this context. It is important to identify which nutrient deficiencies lead to this condition.

2. **Identify Essential Nutrients**:
- Plants require 17 essential mineral elements, which are categorized into macronutrients (needed in larger amounts) and micronutrients (needed in smaller amounts).

3. **Recognize Nutrients Associated with Necrosis**:
- Certain nutrient deficiencies are known to cause necrosis. Key nutrients that can lead to the death of leaf tissues include:
- Calcium
- Magnesium
- Copper
- Potassium

4. **Evaluate the Options Provided**:
- **Option A: Calcium and Magnesium** - Both of these nutrients are known to cause necrosis when deficient. This option is likely correct.
- **Option B: Zinc and Sulphur** - Neither zinc nor sulphur deficiency is associated with necrosis. This option is incorrect.
- **Option C: Molybdenum and Sulphur** - Similar to option B, these nutrients do not cause necrosis. This option is also incorrect.
- **Option D: Molybdenum and Carbon** - Molybdenum does not cause necrosis, and carbon is not a mineral nutrient. This option is incorrect.

5. **Conclusion**:
- Based on the evaluation of the options, the correct answer is **Option A: Calcium and Magnesium**, as their deficiency is directly linked to the death of leaf tissues in plants.

### Final Answer:
The death of leaf tissues in plants is caused by the deficiency of **Calcium and Magnesium** (Option A).

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