Promiment symptoms of manganese toxicity is:

Options

A. Intervenial chlorosis
B. Brown spots surrounded by chlorotic venis
C. Heart rot
D. Water core

Answer

**Step-by-Step Solution:**

1. **Understanding Manganese Toxicity:**
- Manganese toxicity occurs when there is an excessive concentration of manganese in plants, surpassing the desired levels necessary for healthy growth.

2. **Effects of High Manganese Levels:**
- High levels of manganese can harm the plant by interfering with the uptake and availability of other essential nutrients, particularly iron, magnesium, and calcium.

3. **Nutrient Competition:**
- Manganese competes with these essential nutrients, leading to their decreased concentration in the plant. This competition can disrupt normal physiological functions.

4. **Impact on Calcium Translocation:**
- Manganese toxicity inhibits the translocation of calcium to the shoots of the plant, which is crucial for various metabolic processes.

5. **Symptoms of Manganese Toxicity:**
- The prominent symptom of manganese toxicity is the formation of brown spots on the leaves. These spots are typically surrounded by chlorotic (yellowing) veins, indicating a deficiency in the affected nutrients.

6. **Conclusion:**
- Therefore, the correct answer to the question regarding the prominent symptoms of manganese toxicity is the formation of brown spots surrounded by chlorotic veins.