Budding (redirected from budding virions)

budding, type of grafting in which a plant bud is inserted under the bark of the stock (usually not more than a year old). It is best done when the bark will peel easily and the buds are mature, as in spring, late summer, or early autumn. Budding is a standard means of propagating roses and most fruit trees in nurseries. See propagation of plants.

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budding [′bəd·iŋ]

(biology)

A form of asexual reproduction in which a new individual arises as an outgrowth of an older individual. Also known as gemmation.

(botany)

A method of vegetative propagation in which a single bud is grafted laterally onto a stock.

(virology)

A form of virus release from the cell in which replication has occurred, common to all enveloped animal viruses; the cell membrane closes around the virus and the particle exits from the cell.

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Budding 

a method of vegetative propagation of plants in which a bud of a cultivated variety is grafted to wildling stock. A new plant develops from the bud. Budding is performed in nurseries usually in the summer (late July or early August for pome fruits, somewhat earlier for drupaceous plants).

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Budding 

one of the methods of asexual (vegetative) reproduction of animals and plants. Budding is the formation on the parent body of a bud—an outgrowth from which a new individual develops. Plants capable of budding include certain ascomycetes fungi (in yeasts, budding is the principal means of reproduction), a number of basidial fungi, and liverwort mosses (which reproduce by means of brood buds, or bulbels). Among animals, budding is characteristic of protozoans (some flagellates, infusorians, and sporozoans), sponges, coelenterates, some worms, bryozoans, pterobranchs, and tunicates.

Budding in animals may be external or internal. External budding may be parietal, with the buds forming on the parent body, or stolonate, with the buds developing on special processes known as stolons (some coelenterates and tunicates). With internal budding, the new individual develops from an isolated area inside the parent body. Examples are the gemmules of sponges and the statoblasts of bryozoans, which have protective membranes and serve mainly to ensure survival when the parent body perishes in the winter or during a drought. In a number of animals, the budding process remains incomplete and the young individuals remain attached to the parent body. As a result, there arise colonies made up of numerous individuals (colonial organisms). Sometimes budding is artificially induced by various influences, such as burns or cuts, on the parent body.

A. V. IVANOV