¿Podrían los árboles cambiar el comportamiento future en xilogénesis para mejora la aptitude en función de las condiciones pasadas y actuales? Un caso de estudo tropical

Autores/as

DOI:

https://doi.org/10.33448/rsd-v11i9.31442

Palabras clave:

Asignación de carbono; Lignina; Lluvia; Gravedad específica; Características de la madera.

Resumen

La asignación de carbono es el talón de Aquiles de los modelos forestales, debido a la dificultad de predecir las respuestas inducidas por los cambios ambientales. Los modelos estructurales-funcionales involucran la estrategia de la planta para dividir sus recursos entre órganos y funciones. Una característica funcional importante es la arquitectura del xilema, que está relacionada con la estrategia de uso del água y la productividad de la planta, además de uno de los más importantes C-sink (que absorbe carbono). Nuestro objetivo es utilizar la información presente en los anillos de los árboles de Schizolobium parahyba, para ampliar las posibilidades de enfoques teleonómicos en modelos estructurales-funcionales de especies arbóreas. En un análisis comparativo de los anillos del xilema, establecimos relaciones entre la gravedad específica, las caracteristicas de los vasos como potencial de conductividad hidráulica, el espesor de doble pared y la intensidad de autofluorescencia de la lignina. Los análisis mostraron que las características del anillo de crecimiento parecen haber sido moduladas no solo por la disponibilidad de água del período de formación de la madera, sino también por la disponibilidad de agua de años anteriores. Esta relación se estaría dando debido a la mayor capacidad de acumulación de carbohidratos de reserva en años cuyas condiciones climáticas fueran favorables. Este patrón de comportamiento implica la formación de dos patrones de anillos de crecimiento distintos, uno con alto costo estructural y otro con bajo costo estructural. Este estudio de caso nos mostró que la especie puede cambiar el comportamiento futuro en xilogénesis para mejorar la aptitud en función de las condiciones pasadas y actuales. Nuestro estudio puede ayudar a ampliar las posibilidades de los enfoques teleonómicos en modelos estructurales-funcionales de especies arbóreas, ayudando a comprender mejor cómo los árboles equilibran la asignación de carbono en la madera de acuerdo con los cambios en el medio ambiente.

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Publicado

02/07/2022

Cómo citar

SANTOS, C. M. .; ROMEIRO, D. .; AMORIM, E. P. .; BUCCI, L. A. .; RAJPUT, K. S. .; LONGUI, E. L. ¿Podrían los árboles cambiar el comportamiento future en xilogénesis para mejora la aptitude en función de las condiciones pasadas y actuales? Un caso de estudo tropical. Research, Society and Development, [S. l.], v. 11, n. 9, p. e4011931442, 2022. DOI: 10.33448/rsd-v11i9.31442. Disponível em: https://rsdjournal.org/index.php/rsd/article/view/31442. Acesso em: 26 nov. 2024.

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Ciencias Agrarias y Biológicas