NTA Abhyas NEET2020BotanyMineral NutritionPractice
The appearance of brown spots surrounded by chlorotic veins is the prominent symptom of:
Options
- ACopper deficiency
- BMolybdenum deficiency
- CMagnesium toxicity
- DManganese toxicity
Correct answer
D. Manganese toxicity
Step-by-step solution
The prominent symptoms of manganese toxicity is the appearance of brown spots surrounded by chlorotic veins. Manganese competes with iron and magnesium for uptake and with magnesium for bingding with enzymes. It also inhibits calcium translocation to shoot apex.