Document Detail

Developmental stages during the rooting of in-vitro-cultured Quercus robur shoots from material of juvenile and mature origin.
MedLine Citation:
PMID:  14652224     Owner:  NLM     Status:  MEDLINE    
In-vitro-cultured shoots of clones initiated from shoots of the basal parts (BS) and the crown (C) of two mature Quercus robur L. trees were subjected to rooting experiments to relate rooting with shoot topophysical origin. The BS shoots exhibited morphologically juvenile characteristics and rooted more easily after indole-3-butyric acid (IBA) treatment than C shoots. When naphthylphthalamic acid (NPA) was applied to BS shoots, rooting capacity decreased and root emergence was delayed at least 2 days compared with shoots treated with IBA only. During the first days of the rooting process, endogenous indole-3-acetic acid (IAA) concentration was higher in C shoots than in BS shoots, regardless of whether the shoots were treated with NPA. Mitotic figures were observed in cells from the basal part of both BS and C shoots 24 h after IBA treatment. After 4 days of IBA treatment, the occurrence of histological events differed between BS shoots and C shoots. Cells of BS shoots became meristematic, giving rise to meristemoids and root primordia, whereas no differentiation of root meristemoids occurred in cells of C shoots. Thus, although adult oak material (C shoots) is capable of responding to the initial stimulus of auxin during the adventitious rooting process, the endogenous IAA concentration is not the factor limiting rooting in adult material.
N Vidal; G Arellano; M C San-José; A M Vieitez; A Ballester
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Publication Detail:
Type:  Journal Article; Research Support, Non-U.S. Gov't    
Journal Detail:
Title:  Tree physiology     Volume:  23     ISSN:  0829-318X     ISO Abbreviation:  Tree Physiol.     Publication Date:  2003 Dec 
Date Detail:
Created Date:  2003-12-03     Completed Date:  2005-07-18     Revised Date:  2006-11-15    
Medline Journal Info:
Nlm Unique ID:  100955338     Medline TA:  Tree Physiol     Country:  Canada    
Other Details:
Languages:  eng     Pagination:  1247-54     Citation Subset:  IM    
Instituto de Investigaciones Agrobiológicas de Galicia, CSIC, Apartado 122, 15080 Santiago de Compostela, Spain.
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MeSH Terms
Indoleacetic Acids / metabolism
Indoles / metabolism
Phthalimides / metabolism
Plant Growth Regulators / physiology
Plant Roots / growth & development*
Plant Shoots / growth & development
Quercus / growth & development*
Trees / growth & development*
Reg. No./Substance:
0/Indoleacetic Acids; 0/Indoles; 0/Phthalimides; 0/Plant Growth Regulators; 132-66-1/alpha-naphthylphthalamic acid; 133-32-4/indolebutyric acid; 87-51-4/indoleacetic acid

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