crown gall


crown gall
Plant Pathol.
1. a disease of peaches, apples, roses, grapes, etc., characterized by the formation of galls on the roots or stems usually at or below ground level, caused by a bacterium, Agrobacterium tumefaciens.
2. the gall itself.
[1895-1900]

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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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      disease of plants caused by the bacterium Agrobacterium tumefaciens. Thousands of plant species are susceptible; they include especially rose, grape, pome and stone fruits, shade and nut trees, many shrubs and vines, and perennial garden plants. Symptoms include roundish, rough-surfaced galls, several inches or more in diameter, usually at or near the soil line, graft or bud union, or on roots and lower stems. The galls, at first cream coloured or greenish, later turn brown or black. As the disease progresses, plants lose vigour and may eventually die.

      Crown gall can be avoided by using nursery stock free of suspicious bumps near the crown, former soil line, or graft union; practicing five-year rotation or avoiding replanting for that period; removing severely infected plants (including as many roots as possible); protecting against injury; keeping down weeds; controlling root-chewing insects and nematodes; cutting away large galls on trees, and disinfecting the wounds.

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Universalium. 2010.

Look at other dictionaries:

  • crown-gall — ● crown gall, crown galls nom masculin (anglais crown gall, de crown, couronne, et gall, gale) Cancer végétal d origine bactérienne, dont les tumeurs siègent au niveau du collet de la plante, atteignant surtout les jeunes arbres fruitiers …   Encyclopédie Universelle

  • crown gall — noun a bacterial disease of plants (especially pome and stone fruits and grapes and roses) which forms excrescences on the stem near the ground (Freq. 7) • Hypernyms: ↑plant disease • Hyponyms: ↑hairy root * * * noun 1. : a disease of various… …   Useful english dictionary

  • crown gall — Gall, or tumour, found in many dicotyledonous plants, caused by the bacterium Agrobacterium tumefaciens …   Dictionary of molecular biology

  • crown gall — noun a large tumour like gall on the roots or lower trunk of a tree, caused by a bacterium …   English new terms dictionary

  • crown gall — A tumorous growth at the base of certain plants characteristic of infection by Agrobacterium tumefaciens. The gall is induced by the transformation of the plant cell by portions of the Ti plasmid …   Glossary of Biotechnology

  • Crown-gall — Agrobacterium tumefaciens Agrobacterium tumefaciens Systematik Abteilung: Proteobacteria Klasse …   Deutsch Wikipedia

  • crown gall — noun Date: 1900 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 …   New Collegiate Dictionary

  • crown gall — noun A disease of plants caused by infection of soil bacteria of the genus Agrobacterium …   Wiktionary

  • crown gall — /ˈkraʊn gɔl/ (say krown gawl) noun a bacterial disease producing abnormal growths on fruit trees and other plants, caused by Agrobacterium tumefaciens …   Australian English dictionary

  • crown-galls — ● crown gall, crown galls nom masculin (anglais crown gall, de crown, couronne, et gall, gale) Cancer végétal d origine bactérienne, dont les tumeurs siègent au niveau du collet de la plante, atteignant surtout les jeunes arbres fruitiers …   Encyclopédie Universelle


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