alleryStart learning →Blossom end rot in tomato is caused by a deficiency of which nutrient?
AThe element nitrogen
BThe element potassium
CThe element calcium
DThe element iron
Answer & Solution
Correct answer: C. The element calcium
1. Different nutrient shortages leave different visible marks on a crop.
2. Blossom end rot in a grape tomato is caused by calcium deficiency.
3. Calcium regulates nutrient transport and supports many enzyme functions, so a shortage disrupts developing tissue.
4. Yellowing between the veins is tied to magnesium instead, so chlorosis symptoms point elsewhere.
5. Potassium deficiency is the shortage illustrated in palms rather than in tomato fruit.
6. Iron is a micronutrient and is not the element named for this disorder.
_Source: OpenStax Biology (1st ed., CC BY 4.0), Ch 31 "Soil and Plant Nutrition", section 31.1 Nutritional Requirements of Plants_
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