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bud (v. intr.)
1.produce buds, branches, or germinate"the potatoes sprouted"
bud (n.)
1.a partially opened flower
2.a swelling on a plant stem consisting of overlapping immature leaves or petals
3.any new growth of a plant such as a new branch or a bud
4.boyfriend or girlfriend
5.a close friend who accompanies his buddies in their activities
bud (v.)
1.start to grow or develop"a budding friendship"
2.develop buds"The hibiscus is budding!"
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Merriam Webster
BudBud (bŭd), n. [OE. budde; cf. D. bot, G. butze, butz, the core of a fruit, bud, LG. butte in hagebutte, hainbutte, a hip of the dog-rose, or OF. boton, F. bouton, bud, button, OF. boter to bud, push; all akin to E. beat. See Button.]
1. (Bot.) A small protuberance on the stem or branches of a plant, containing the rudiments of future leaves, flowers, or stems; an undeveloped branch or flower.
2. (Biol.) A small protuberance on certain low forms of animals and vegetables which develops into a new organism, either free or attached. See Hydra.
Bud moth (Zoöl.), a lepidopterous insect of several species, which destroys the buds of fruit trees; esp. Tmetocera ocellana and Eccopsis malana on the apple tree.
BudBud, v. i. [imp. & p. p. Budded; p. pr. & vb. n. Budding.]
1. To put forth or produce buds, as a plant; to grow, as a bud does, into a flower or shoot.
2. To begin to grow, or to issue from a stock in the manner of a bud, as a horn.
3. To be like a bud in respect to youth and freshness, or growth and promise; as, a budding virgin. Shak.
Syn. -- To sprout; germinate; blossom.
BudBud, v. t. To graft, as a plant with another or into another, by inserting a bud from the one into an opening in the bark of the other, in order to raise, upon the budded stock, fruit different from that which it would naturally bear.
The apricot and the nectarine may be, and usually are, budded upon the peach; the plum and the peach are budded on each other. Farm. Dict.
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⇨ voir la définition de Wikipedia
Voir aussi
bud (v. intr.)
↗ germ
⇨ Limb Bud • arnica bud • big-bud hickory • bud brush • bud sagebrush • compound bud • cotton bud • flower bud • gustatory bud • in bud • leaf bud • mixed bud • nip (something) in the bud • nip in the bud • red-bud • shield-bud • taste bud
bud (n.)
bloom, blossom, flower[Hyper.]
bud[Dérivé]
bud (n.)
bud[ClasseHyper.]
bud (n.)
bud (n.)
start; inception; outset; beginning[Classe]
chose ou partie convexe ou renflée (fr)[ClasseParExt.]
(fetus; foetus)[termes liés]
(cavity; bodily cavity; cavum; hollow), (organ; fabric; tissue), (organ donor)[termes liés]
bud (n.)
bud (v.)
begin, start[Hyper.]
bud (v. intr.)
apparaître : devenir distinct, manifeste (fr)[Classe]
grow[Classe]
(bud)[termes liés]
(seed)[termes liés]
grow, sprout up[Hyper.]
offshoot, sprout - bud, shoot, sprout - shoot - germination, sprouting - gemmation, pullulation[Dérivé]
germinate[Domaine]
bud (v. tr.)
greffer un végétal (fr)[Classe]
Wikipedia - voir aussi
Wikipedia
This article needs additional citations for verification. Please help improve this article by adding citations to reliable sources. Unsourced material may be challenged and removed. (June 2008) |
In botany, a bud is an undeveloped or embryonic shoot and normally occurs in the axil of a leaf or at the tip of the stem. Once formed, a bud may remain for some time in a dormant condition, or it may form a shoot immediately. Buds may be specialized to develop flowers or short shoots, or may have the potential for general shoot development. The term bud is also used in zoology, where it refers to an outgrowth from the body which can develop into a new individual.
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The buds of many woody plants, especially in temperate or cold climates, are protected by a covering of modified leaves called scales which tightly enclose the more delicate parts of the bud. Many bud scales are covered by a gummy substance which serves as added protection. When the bud develops, the scales may enlarge somewhat but usually just drop off, leaving on the surface of the growing stem a series of horizontally-elongated scars. By means of these scars one can determine the age of any young branch, since each year's growth ends in the formation of a bud, the formation of which produces an additional group of bud scale scars. Continued growth of the branch causes these scars to be obliterated after a few years so that the total age of older branches cannot be determined by this means.
In many plants scales are not formed over the bud, which is then called a naked bud.[1] The minute underdeveloped leaves in such buds are often excessively hairy. Naked buds are found in some shrubs, like some species of the Sumac and Viburnums (Viburnum alnifolium and V. lantana)[2] and in herbaceous plants. In many of the latter, buds are even more reduced, often consisting of undifferentiated masses of cells in the axils of leaves. A terminal bud occurs on the end of a stem and lateral buds are found on the side. A head of cabbage (see Brassica) is an exceptionally large terminal bud, while Brussels sprouts are large lateral buds.
Since buds are formed in the axils of leaves, their distribution on the stem is the same as that of leaves. There are alternate, opposite, and whorled buds, as well as the terminal bud at the tip of the stem. In many plants buds appear in unexpected places: these are known as adventitious buds.[3]
Often it is possible to find a bud in a remarkable series of gradations of bud scales. In the buckeye, for example, one may see a complete gradation from the small brown outer scale through larger scales which on unfolding become somewhat green to the inner scales of the bud, which are remarkably leaf-like. Such a series suggests that the scales of the bud are in truth leaves, modified to protect the more delicate parts of the plant during unfavorable periods.
Buds are often useful in the identification of plants, especially for woody plants in winter when leaves have fallen.[4] Buds may be classified and described according to different criteria: location, status, morphology, and function.
Botanists commonly use the following terms:
The term bud (as in budding) is used by analogy within zoology as well, where it refers to an outgrowth from the body which develops into a new individual. It is a form of asexual reproduction limited to animals or plants of relatively simple structure. In this process a portion of the wall of the parent cell softens and pushes out. The protuberance thus formed enlarges rapidly while at this time the nucleus of the parent cell divides (see: mitosis, meiosis). One of the resulting nuclei passes into the bud, and then the bud is cut off from its parent cell and the process is repeated. Often the daughter cell will begin to bud before it becomes separated from the parent, so that whole colonies of adhering cells may be formed. Eventually cross walls cut off the bud from the original cell.
[[it:Gemma (botanica]
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