Etude comparative des paramètres morphophysiologiques d'adaptation à la sécheresse de morphotypes d'igname (Waogo et Nyù) cultivés au Burkina Faso

Yam is a tuber cultivated mainly in West Africa. Its culture faces biological and non-biological constraints of climatic types especially. The increasingly high temperatures as well as the bad spatio-temporal distribution accentuate the aridity of the grounds which considerably disturb the developme...

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Bibliographic Details
Published inInternational journal of innovation and applied studies Vol. 30; no. 1; pp. 112 - 120
Main Authors Dondasse, Edmond, Kihindo, Adama Pascal, Tiama, Djakaridja, Badiel, Badoua, Zombre, Gérard
Format Journal Article
LanguageFrench
Published Rabat International Journal of Innovation and Applied Studies 01.07.2020
Subjects
Adaptation
Aridity
Comparative studies
Cultivation
Parameters
Temporal distribution
Transpiration
Burkina Faso
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Summary:Yam is a tuber cultivated mainly in West Africa. Its culture faces biological and non-biological constraints of climatic types especially. The increasingly high temperatures as well as the bad spatio-temporal distribution accentuate the aridity of the grounds which considerably disturb the development even the production of yam. The objective of this study was to compare the morphophysiological adaptation responses of yam morphotypes subjected to water stress and to determine the portion of the seedling and the water regime suitable for a cultivation of yam in semi-arid zones. even arid. To do this, two morphotypes of yam «waogo» (Dioscorea alata) and «nyu» (D. cayenensis - D. rotundata complex) were grown in pots in real conditions. The tubers of each morphotype were divided into three portions and then subjected to three water regimes. Environmental and morphophysiological parameters were noted during the study. For all the parameters studied, the results show that the «nyu» is more tolerant of water deficit than the «waogo» with a larger root biomass and leaf area and lower transpiration. This study reveals that depending on the portion of the seed used and water regime, «nyu» and «waogo» have differentiated behaviors.
ISSN:2028-9324