crown gall


crown gall

noun

Definition of CROWN GALL

:  a disease that affects many species of plants and is caused by a bacterium (Agrobacterium tumefaciens) which forms tumorous enlargements usually just below the ground on the stem

First Known Use of CROWN GALL

1900

Rhymes with CROWN GALL

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crown gall

noun    (Concise Encyclopedia)

Disease of plants caused by the bacterium Agrobacterium tumefaciens. Thousands of plant species are susceptible, including especially rose, grape, pome and stone fruits (e.g., apples, peaches), shade and nut trees, many shrubs and vines, and perennial garden plants. Symptoms include roundish, rough-surfaced galls, several inches or more in diameter. At first cream-coloured or greenish, they later turn brown or black. As the disease progresses, affected plants lose vigour and may eventually die.

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