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árboresarbustosplantascauleleñosacascasaibaplantas parasitasinsectosfungossequoiasCentro de Interpretación da NaturezaGroveCastiñeiroEucaliptoFreixo










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Tronco (árbore)




Na Galipedia, a Wikipedia en galego.






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Para outras páxinas con títulos homónimos véxase: Tronco.



Exemplo de troco vello dun carballo na Carballeira de Santa Susana, Santiago de Compostela.


O tronco ou toro é o talo principal das árbores e arbustos. Nas plantas, un tronco é un tipo de caule leñosa, resistente, cilíndrica ou cónica e tamén máis longa na base ca na cima, con ramificacións que se forman a partir de certa altura.


Xusto debaixo da superficie do tronco (casca), a saiba da árbore, transporta os nutrientes minerais procedentes da terra. A árbore protexe esas canles mediante a casca; así e todo, plantas parasitas, insectos e fungos.


O tronco da maior parte das árbores adultas chega a aumentar uns 2,5 cm por ano (o das sequoias xigantes, 8 cm), e medra cara a fóra, de xeito que se cortamos un tronco é posíbel ver os aneis concéntricos que o conforman. Contando eses aneis, sábese a idade que tiña a árbore.


Chámase toco á parte do tronco ou do talo que queda pegado á raíz, despois de cortar unha planta ou unha árbore.


Sección do tronco de diversas árbores no Centro de Interpretación da Natureza do Grove:





  • Castiñeiro







  • Eucalipto







  • Freixo







Véxase tamén |


  • Talo

  • Cortiza

  • Casca




Traído desde "https://gl.wikipedia.org/w/index.php?title=Tronco_(árbore)&oldid=4376376"










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