Absence of Mglons from plant tissues results in

Options

A. plasmolysis
B. hydrolysis
C. chlorosis
D. necrosis

Answer

**Step-by-Step Solution:**

1. **Understanding the Role of Magnesium Ions in Plants:**
- Magnesium ions (Mg²⁺) are essential for various physiological processes in plants, including chlorophyll synthesis, enzyme activation, and overall plant health.

2. **Analyzing the Options:**
- The question provides four options: plasmolysis, hydrolysis, chlorosis, and necrosis. We need to determine which of these is directly related to the absence of magnesium ions.

3. **Evaluating Plasmolysis:**
- Plasmolysis occurs when plant cells lose water in a hypertonic solution, causing the cell membrane to pull away from the cell wall. This process is not directly related to magnesium deficiency, so it can be ruled out.

4. **Evaluating Hydrolysis:**
- Hydrolysis refers to the chemical breakdown of a compound due to reaction with water. This process is not influenced by magnesium ions, making this option incorrect as well.

5. **Evaluating Chlorosis:**
- Chlorosis is characterized by the yellowing of leaves due to insufficient chlorophyll production. Magnesium is crucial for chlorophyll synthesis, so a deficiency can lead to chlorosis. However, chlorosis can also result from other nutrient deficiencies, making it a less direct consequence of magnesium absence.

6. **Evaluating Necrosis:**
- Necrosis refers to the death of plant tissue, which can occur due to various factors, including nutrient deficiencies. A lack of magnesium can lead to necrosis, particularly in older leaves and storage organs, where the tissue may turn brown or black.

7. **Conclusion:**
- Among the options, necrosis is the most directly related consequence of magnesium ion deficiency in plants. Therefore, the correct answer is necrosis.

**Final Answer:**
The absence of magnesium ions from plant tissues results in necrosis.

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