Certified Arborist Practice Test

Question: 1 / 400

What is chlorosis in plants?

Brown spots on leaves

Yellowing between leaf veins

Chlorosis is a condition in plants characterized by the yellowing of leaf tissue, especially noticeable between the veins, while the veins themselves often remain green. This is primarily due to a lack of chlorophyll, the pigment responsible for the green color in plants and essential for photosynthesis. When chlorophyll production is impaired, the leaves lose their green coloration and develop a yellow appearance.

This condition can stem from various issues such as nutrient deficiencies (especially nitrogen, iron, or magnesium), poor drainage, soil compaction, or root damage. Identifying chlorosis can help in diagnosing underlying problems affecting plant health, such as nutrient availability or root health. Recognizing this visual cue allows for timely interventions to address the specific cause, promoting healthier plant growth.

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Wilting of leaves

Stunted growth

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