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Quantitative variations of indolyl compounds including IAA, IAA-aspartate and serotonin in walnut microcuttings during root induction
Gatineau, F.; Fouché, J. G.; Kevers, Claire et al.
1997In Biologia Plantarum, 39 (1), p. 131-137
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Keywords :
Juglans nigra x J. regia
Abstract :
[en] Shoots of the hybrid walnut Juglans nigra x Juglans regia contained serotonin in the micromole range and indole-3-acetic acid (IAA) in the nanomole range. The serotonin level fell by 40 % in 12 h in auxin (IBA) treated whole shoots and then reincreased to a maximum (50 % over the control) after 36 h. The same pattern was followed in the top portions of the shoot but in the shoot bases, serotonin always remained under the control level. The early decrease of serotonin was correlated with an increase in IAA-aspartate. The early decrease and peaking of the serotonin level preceded and corresponded to the increase and peaking of free IAA in the shoot bases. The initial serotonin pool in treated-to-root shoots might thus suffice for the biosynthesis of IAA and IAA-conjugated compounds. Because of its auxin-like properties, the early serotonin peak might be taken into consideration as an endogenous auxin signal for rooting in the present material. If this turns out to be so, the rooting signal for the shoot bases necessarily should come from the apices.
Disciplines :
Phytobiology (plant sciences, forestry, mycology...)
Author, co-author :
Gatineau, F.;  Institut de Botanique B 22, Université de Liège, Sart-Tilman, B-4000 Liège, Belgium
Fouché, J. G.;  Institut de Botanique B 22, Université de Liège, Sart-Tilman, B-4000 Liège, Belgium
Kevers, Claire ;  Université de Liège > Département des sciences de la vie > Département des sciences de la vie
Hausman, J. F.;  C.R.P, Centre Universitaire de Luxembourg, 162 A, Av. de la Faïencerie, L-1511 Luxembourg, Luxembourg
Gaspar, T.;  Institut de Botanique B 22, Université de Liège, Sart-Tilman, B-4000 Liège, Belgium
Language :
English
Title :
Quantitative variations of indolyl compounds including IAA, IAA-aspartate and serotonin in walnut microcuttings during root induction
Publication date :
1997
Journal title :
Biologia Plantarum
ISSN :
0006-3134
eISSN :
1573-8264
Publisher :
Academy of Sciences of the Czech Republic. Institute of Experimental Botany, Praha, Czechia
Volume :
39
Issue :
1
Pages :
131-137
Peer reviewed :
Peer Reviewed verified by ORBi
Available on ORBi :
since 15 July 2015

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