Dynamics of Growth and Development of Banana (Musa AAA Simmonds cvs. Gran Enano and Valery) Dinámica del Crecimiento y Desarrollo del Banano (Musa AAA Simmonds cvs. Gran Enano y Valery)

This research was conducted in the banana zone on Urabá (Colombia), whith cvs. Gran Enano and Valery. Since planting, each three to four leaves sprouted, three plants per variety were sampled, each corresponding to a repetition. These were separated into its different organs and the total dry matter...

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Bibliographic Details
Main Authors: Ana María Martínez Acosta, Daniel Gerardo Cayón Salinas
Format: Article
Language:English
Published: Universidad Nacional de Colombia, Sede Medellín 2011-12-01
Series:Revista Facultad Nacional de Agronomía Medellín
Subjects:
Online Access:http://www.scielo.org.co/scielo.php?script=sci_arttext&pid=S0304-28472011000200003
Description
Summary:This research was conducted in the banana zone on Urabá (Colombia), whith cvs. Gran Enano and Valery. Since planting, each three to four leaves sprouted, three plants per variety were sampled, each corresponding to a repetition. These were separated into its different organs and the total dry matter was estimated. Each cv. was analyzed on a growth curve. The dry matter accumulation on both cvs. is adjusted to the typical sigmoid curve of the plant growth. In the exponential phase, the corm was the main source of assimilates for the development; while in the lineal and senescence phase, the pseudo-stem and leaves were the reservoir organs; when the bunch is formed, such reserves were sent to this drain. In general, while the development progressed, the vegetative organs did not show any dry matter lost, only reduction in the assimilates accumulation rate; unlike the bunch that from its emission kept a high rate, leading the fruit to represent, in the harvest season, almost 50% of the total dry matter of the plant.<br>El estudio se realizó en la zona bananera de Urabá (Colombia); con los cvs. Gran Enano y Valery. A partir de la siembra, cada tres a cuatro hojas emitidas, se muestrearon tres plantas por cv., cada una correspondiente a una repetición. Estas se separaron en sus diferentes órganos y se estimó la materia seca total. Se analizó cada cv. a partir de curvas de crecimiento. La acumulación de materia seca en ambos cvs. se ajustó al modelo típico de la curva sigmoidea del crecimiento vegetal. En la fase exponencial, el cormo fue la principal fuente de asimilados para el desarrollo;mientras que en la fase lineal y de senescencia,el pseudotallo y hojas fueron órganos reservorio; al formarse el racimo, tales reservas fueron enviadas a ese sumidero. En general, a medida que avanzaba el desarrollo, los órganos vegetativos no presentaron pérdidas de materia seca, solo disminución en la tasa de acumulación de asimilados;a diferencia del racimo que desde su emisión mantuvo una tasa elevada, llevando a que al momento de la cosecha el fruto, representara cerca del 50% de la materia seca total de la planta.
ISSN:0304-2847