germination hormone

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• Germination — is the process whereby growth emerges from a period of dormancy. The most common example of germination is the sprouting of a seedling from a seed of an angiosperm or gymnosperm. However, the growth of a sporeling from a spore, for example the… …   Wikipedia

• hormone — hormonal, hormonic /hawr mon ik, moh nik/, adj. /hawr mohn/, n. 1. Biochem. any of various internally secreted compounds, as insulin or thyroxine, formed in endocrine glands, that affect the functions of specifically receptive organs or tissues… …   Universalium

• Hormone végétale — Phytohormone Une phytohormone, ou hormone végétale, est une hormone produite par une plante. C est une substance chimique organique qui régule la croissance végétale ou qui intervient dans la communication entre individus végétaux différents (un… …   Wikipédia en Français

• Plant hormone — Plant hormones (also known as phytohormones) are chemicals that regulate plant growth. Plant hormones are signal molecules produced within the plant, and occur in extremely low concentrations. Hormones regulate cellular processes in targeted… …   Wikipedia

• plant hormone — noun Any of many substances, produced by plants, that control or regulate their germination, growth, metabolism etc. Syn: phytohormone …   Wiktionary

• plant development — Introduction       a multiphasic process in which two distinct forms succeed each other in alternating generations. One form, created by the union of sexual cells (gametes (gamete)), contains two sets of similar chromosomes (diploid). At sexual… …   Universalium

• angiosperm — /an jee euh sperrm /, n. Bot. a plant having its seeds enclosed in an ovary; a flowering plant. Cf. gymnosperm. [ANGIO + SPERM] * * * ▪ plant Introduction       any member of the more than 300,000 species of flowering plants (division Anthophyta) …   Universalium

• PHYTOHORMONES — Les phytohormones ou hormones végétales répondent exactement à la définitition des hormones dans le monde animal; ce sont des substances organiques, de poids moléculaire moyen, diffusibles et cristallisables. Produites par certaines cellules,… …   Encyclopédie Universelle

• seed and fruit — ▪ plant reproductive part Introduction       respectively, the characteristic reproductive (reproductive system, plant) body of both angiosperms (flowering plants) and gymnosperms (conifers, cycads, and ginkgos) and the ovary that encloses it.… …   Universalium

• reproductive system, plant — Introduction       any of the systems, sexual or asexual, by which plants reproduce. In plants, as in animals, the end result of reproduction is the continuation of a given species, and the ability to reproduce is, therefore, rather conservative …   Universalium

• RÉSERVES PHYSIOLOGIQUES - Réserves végétales — La continuité de l’espèce chez les Végétaux supérieurs (Spermaphytes) est assurée par divers systèmes s’appuyant sur des structures dont la plus répandue et la mieux exploitée est la graine. Mais ce n’est pas le seul organe de conservation et de… …   Encyclopédie Universelle