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Crown gall disease — OCR GCSE Combined Science A Definition

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Combined Science
Key terms
Crown gall disease

GCSE Combined Science · key term

Crown gall disease

Definition

A bacterial plant disease caused by Agrobacterium tumefaciens that produces swollen, disorganised growths on roots or stems.

Used by OCR

How each exam board covers it

OCR GCSE Combined Science A · J250

Specification B6.3f · Biology Paper 2

Three examples show how different pathogens produce different symptoms: tobacco mosaic virus, barley powdery mildew and crown gall disease.
Revise: Viral, Fungal and Bacterial Plant Diseases

OCR Combined Science A past papers

Related key terms

Barley powdery mildew
Fungicide
Gall
Pathogen
Spore

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Tobacco mosaic virus (TMV)