Article (Scientific journals)
Tuber formation and development of Dioscorea cayenensis-D. rotundata complex in vitro. Effect of polyamines.
Ondo Ovono, Paul; Kevers, Claire; Dommes, Jacques
2009In In Vitro Cellular and Developmental Biology. Plant
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Keywords :
polyamines; Dioscorea cayenensis-D. rotundata; microtuberisation; yam
Abstract :
[en] Tuberisation was obtained in vitro on yam (Dioscorea cayenensis-D.rotundata complex). The effect of exogenous polyamines on tuber formation and development (length and weight of microtubers) were investigated and discussed in relation with changes in endogenous polyamines. Application of exogenous polyamines, inhibitors of their metabolism and polyamines precursors in various concentrations positively affected microtuber formation by yam nodal cuttings and their further development. In control conditions, three weeks are needed to obtain 100% of tuberisation. With low concentrations of putrescine (10 5 or 10 6 M), tuber formation occurred earlier. Polyamine endogenous level and metabolism can be significantly affected by exogenous polyamines but modifications of endogenous free polyamines could not be directly correlated to the tuber formation process. Increases in endogenous putrescine and auxins were observed in tubers showing a better development in the presence of putrescine. These results can be used for optimising in vitro conditions for mass production of larger microtubers of the Dioscorea cayenensis-D. rotundata complex.
Disciplines :
Phytobiology (plant sciences, forestry, mycology...)
Biotechnology
Author, co-author :
Ondo Ovono, Paul ;  Université de Liège - ULiège > Doct. sc. (bioch., bioch. mol.&cell., bioinf.&mod.-Bologne)
Kevers, Claire ;  Université de Liège - ULiège > Département des sciences de la vie > Département des sciences de la vie
Dommes, Jacques ;  Université de Liège - ULiège > Département des sciences de la vie > Biologie moléculaire et biotechnologie végétales
Language :
English
Title :
Tuber formation and development of Dioscorea cayenensis-D. rotundata complex in vitro. Effect of polyamines.
Publication date :
2009
Journal title :
In Vitro Cellular and Developmental Biology. Plant
ISSN :
1054-5476
eISSN :
1475-2689
Publisher :
Springer Science & Business Media B.V., Wallingford, United Kingdom
Peer reviewed :
Peer Reviewed verified by ORBi
Available on ORBi :
since 28 December 2009

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