Blooms are typical characteristic for the over department of the seed plants (Spermatophyta); in former times therefore even the seed plants were called bloom plants (Anthophyta). However also some container pore plants (Pteridophyta) carry for blooms: This concerns with many representatives of the and box stems.

Morphology of the blooms of the Bedecktsamer

An idealized bloom consists of modified sheets, which are arranged in circles from outside to inside in the following order:

• Cup, Calyx.
• or petals: Flower crown, Corolla, Corolle, Korolle.
• The whole of the is called Androeceum or Androecium; there is present mostly two circles of
• They form the stamp (Gynoeceum); this consists of scar, stylus and Fruchtknoten (or fruit belly).
• Bloom soil: This is a reshuffled part of the branch axle.

Important regulation characteristics of the blooms are:

• Recovery (reduction) one or several of the five petal circles.
• Individual bloom parts freely or grow together (Choripetal - Sympetal).
• Symmetry axis: zygomorph or
• Position of the Fruchtknotens in relation to the bloom covering: upper, central or under-constantly

Blooms occur usually in majority at a plant; during the plant regulation also the color and the form of the bloom conditions play a role beside the structure of the blooms.

Function

The function of the bloom is it to make the fertilization possible of a male germ cell (Pollen) with a female germ cell (Eizelle) whereby a Zygote develops, from which itself again the vegetable embryo developed. This fertilization is part of the life cycle of a sexually reproducing organism.

After fertilization a seed matures near, from this new Pflanze.Die seed develops is usually embedded in fruits.

Bloom characteristics as basis of botanischen systematics

The substantial characteristics of the bloom with the determination of the plants are their symmetry and the number "“) of sheets in the individual petal circles. The moreover one naturally still the color of the petals, in particular the is added whereby this can vary more strongly than the two aforementioned characteristics. The position of the Fruchtknotens regarding the bloom soil is likewise a constant characteristic of the bloom plants (Angiospermae). In individual cases typical special formations of the petals can occur, frequently are for example Nektar sezernierende honey sheets.

Since plant systematics justified by Carl von developed exactly on the morphologic bloom characteristics, at least the families of the bloom plants let themselves be kept apart alone with the characteristics mentioned"…

One differentiates according to symmetry forms:

• or blooms
• mirror-symmetric or bilateral blooms
• monosymmetrical or zygomorphe blooms
• asymmetrical blooms without recognizable symmetry

See also: Bloom formula

Related links

• Bloom biology (pdf)
• Bloom and fruit biology

Physiology of the bud from impulse and the bloom formation

Articles in category "Bloom"

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