Restart of lignification in micropropagated walnut shoots coincides with rooting induction

Bisbis, Badia; Kevers, Claire; Crèvecoeur, Michèle; Dommes, Jacques; Gaspar, Thomas

doi:10.1023/A:1027360326886

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Restart of lignification in micropropagated walnut shoots coincides with rooting induction

Bisbis, Badia; Kevers, Claire; Crèvecoeur, Michèle et al.

2003 • In Biologia Plantarum, 47 (1), p. 1-5

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10.1023/A:1027360326886

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Keywords :

auxin; Juglans regia x J. nigra; in vitro culture; peroxidase

Abstract :

[en] The lignin content of walnut shoots did not change during in vitro shoot Multiplication. Lignin content started to increase as soon as shoots were passed to a rooting medium with auxin. Exogenous auxin (applied for rooting) Caused a transient elevation of the endogenous free indoleacetic acid (IAA) content with a Simultaneous decrease of peroxidase activity. These events typically marked the completion of the rooting inductive phase (before any visible histological event. that is before the cell divisions beginnin- the rootin- initiation phase). This meant that either the given exogenous auxin or the endogenous IAA has served as signal for the stimulation of lignification. Continued increase of lignification in the shoots required completion of root formation; this increase indeed was slown down when root emergence did not occur. It was further shown that lionification varied conversely to the content of the Soluble Phenol Content. itself apparently being related to the activity of phenylalanine ammonia-lyase activity.

Disciplines :

Biotechnology
Phytobiology (plant sciences, forestry, mycology...)

Author, co-author :

Bisbis, Badia; Université de Liège - ULiège > Hormonologie végétale

Kevers, Claire ; Université de Liège - ULiège > Département des sciences de la vie > Biologie moléculaire et biotechnologie végétales

Crèvecoeur, Michèle; Université de Genève - UNIGE > Physiologie et Biochimie Végétales

Dommes, Jacques ; Université de Liège - ULiège > Département des sciences de la vie > Biologie moléculaire et biotechnologie végétales

Gaspar, Thomas ; Botanique, radiobotanique & serres expér.

Language :

English

Title :

Restart of lignification in micropropagated walnut shoots coincides with rooting induction

Publication date :

2003

Journal title :

Biologia Plantarum

ISSN :

0006-3134

eISSN :

1573-8264

Publisher :

Kluwer Academic Publ, Dordrecht, Netherlands

Volume :

Issue :

Pages :

1-5

Peer reviewed :

Peer Reviewed verified by ORBi

Available on ORBi :

since 28 December 2008

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