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Important structures in plant development are buds, shoots, roots, leaves, and flowers; plants produce these tissues and structures throughout their life from meristems located at the tips of organs, or between mature tissues. Thus, a living plant always has embryonic tissues. By contrast, an animal embryo will very early produce all of the body parts that it will ever have in its life. When the animal is born (or hatches from its egg), it has all its body parts and from that point will only grow larger and more mature. However, both plants and animals pass through a phylotypic stage that evolved independently and that causes a developmental constraint limiting morphological diversification.

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  • نمو النبات هي العملية التي تصف نمو النباتات من حيث تشريح وفيزيولوجيا وعلم تشكل النبات. (ar)
  • Important structures in plant development are buds, shoots, roots, leaves, and flowers; plants produce these tissues and structures throughout their life from meristems located at the tips of organs, or between mature tissues. Thus, a living plant always has embryonic tissues. By contrast, an animal embryo will very early produce all of the body parts that it will ever have in its life. When the animal is born (or hatches from its egg), it has all its body parts and from that point will only grow larger and more mature. However, both plants and animals pass through a phylotypic stage that evolved independently and that causes a developmental constraint limiting morphological diversification. According to plant physiologist A. Carl Leopold, the properties of organization seen in a plant are emergent properties which are more than the sum of the individual parts. "The assembly of these tissues and functions into an integrated multicellular organism yields not only the characteristics of the separate parts and processes but also quite a new set of characteristics which would not have been predictable on the basis of examination of the separate parts." (en)
  • Le développement végétal est l'ensemble des changements qualitatifs dans la formation d'une plante. Il consiste en la mise en place des différents organes du végétal, appelée « organogenèse ». Le développement d'une plante vasculaire commence à partir d'un zygote l'embryogenèse, issu de la fécondation d'un ovule par un gamète mâle. Aussitôt, il commence à se diviser pour former l'embryon d'une plante grâce au processus de l'embryogenèse. Dès lors, les cellules résultantes s'organisent pour qu'une extrémité devienne la première racine (radicule), tandis que l'autre extrémité forme la pointe de la pousse. Dans la graine, l'embryon développe une ou plusieurs « feuilles séminales » (cotylédons). À la fin de l'embryogenèse, la jeune plante dispose de toutes les parties nécessaires pour commencer sa vie. Puis, grâce à la division par mitose des cellules des méristèmes, les organes s'allongent lors de la période d'élongation (croissance), et enfin continuent à se différencier, acquérant les organites nécessaires à leur fonction (chloroplastes pour les cellules effectuant la photosynthèse, durcissement de la paroi squelettique pour les vaisseaux conduisant la sève brute, etc.). Les stades phénologiques sont les repères qui jalonnent le développement de la plante. Articles détaillés : Croissance circannuelle des plantes, Morphogenèse, et Différenciation cellulaire. (fr)
  • O desenvolvimento vegetal pode ser definido como o conjunto de processos de divisão celular, crescimento e diferenciação celular, que resultam na formação do corpo de uma planta adulta. Assim como todos os organismos sexuados, o corpo das plantas é formado a partir de uma única célula chamada zigoto, cujo surgimento se dá pela fusão de dois gametas, masculino e feminino. (pt)
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  • نمو النبات هي العملية التي تصف نمو النباتات من حيث تشريح وفيزيولوجيا وعلم تشكل النبات. (ar)
  • O desenvolvimento vegetal pode ser definido como o conjunto de processos de divisão celular, crescimento e diferenciação celular, que resultam na formação do corpo de uma planta adulta. Assim como todos os organismos sexuados, o corpo das plantas é formado a partir de uma única célula chamada zigoto, cujo surgimento se dá pela fusão de dois gametas, masculino e feminino. (pt)
  • Important structures in plant development are buds, shoots, roots, leaves, and flowers; plants produce these tissues and structures throughout their life from meristems located at the tips of organs, or between mature tissues. Thus, a living plant always has embryonic tissues. By contrast, an animal embryo will very early produce all of the body parts that it will ever have in its life. When the animal is born (or hatches from its egg), it has all its body parts and from that point will only grow larger and more mature. However, both plants and animals pass through a phylotypic stage that evolved independently and that causes a developmental constraint limiting morphological diversification. (en)
  • Le développement végétal est l'ensemble des changements qualitatifs dans la formation d'une plante. Il consiste en la mise en place des différents organes du végétal, appelée « organogenèse ». Le développement d'une plante vasculaire commence à partir d'un zygote l'embryogenèse, issu de la fécondation d'un ovule par un gamète mâle. Aussitôt, il commence à se diviser pour former l'embryon d'une plante grâce au processus de l'embryogenèse. Dès lors, les cellules résultantes s'organisent pour qu'une extrémité devienne la première racine (radicule), tandis que l'autre extrémité forme la pointe de la pousse. Dans la graine, l'embryon développe une ou plusieurs « feuilles séminales » (cotylédons). À la fin de l'embryogenèse, la jeune plante dispose de toutes les parties nécessaires pour commence (fr)
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  • Plant development (en)
  • نمو النبات (ar)
  • Développement végétal (fr)
  • Desenvolvimento vegetal (pt)
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