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Regulación de la iniciación de la hoja por el oído terminal 1 gen del maíz

B Veit¹, S P Briggs, R J Schmidt

¹Institute of Molecular Biosciences, Massey University, Palmerston North, New Zealand.

|May 29, 1998

Resumen

Un gen de maíz recientemente identificado, terminal ear 1 (tel), es crucial para regular la iniciación de la hoja. Su actividad de unión al ARN puede controlar el momento y la posición del desarrollo de nuevas hojas en las plantas.

Área de la Ciencia:

Biología del desarrollo vegetal Biología del desarrollo vegetal
Genética La genética.
Biología molecular La biología molecular.

Sus antecedentes:

La arquitectura de las plantas está determinada principalmente por el desarrollo post-embrionario en las puntas de los brotes.
La disposición de las hojas (phyllotaxy) se establece por la primordia de la hoja que surge en sitios específicos en el ápice del brote.
Los mecanismos precisos que rigen el tiempo de iniciación de la hoja y la determinación del sitio siguen siendo incompletamente entendidos.

Objetivo del estudio:

Para investigar el papel del gen de maíz, oreja terminal 1 (tel), en la regulación de la iniciación de la hoja.
Para explorar la función molecular del producto del gen tel en el desarrollo de las plantas.

Principales métodos:

Análisis de los patrones de expresión génica de la oreja terminal 1 en brotes de maíz.
Caracterización fenotípica de los mutantes que carecen de oído terminal funcional 1.
Análisis bioinformático del producto del gen tel para los motivos funcionales conservados.

Principales resultados:

Los patrones de expresión del oído terminal 1 en el brote se correlacionan con la iniciación de la hoja.
Los mutantes de la oreja terminal 1 exhiben una iniciación de la hoja alterada.
El producto del telgen posee motivos de unión al ARN conservados, lo que sugiere un papel en la regulación del ARN.

Conclusiones:

La oreja terminal 1 (tel) juega un papel importante en la regulación de la iniciación de la hoja en el maíz.
La actividad de unión al ARN del producto del gen tel es probablemente central para su función en el control del desarrollo de las hojas.

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