Tuber-pod competition and drought responses in yam bean (Pachyrhizus ahipa (Wedd.) Parodi)

Diouf Ousmane, Roy-Macauley Harold, Annerose Daniel. 1998. Tuber-pod competition and drought responses in yam bean (Pachyrhizus ahipa (Wedd.) Parodi). In : Proceedings of 2nd international symposium on tuberous legumes, Celaya, Guanajuato, Mexico, 5-8 August 1996. Estrella J.E.E. (ed.), Hamann O.J. (ed.), Rios Ruiz S.A. (ed.), Sorensen M.. INIFAP, Royal Veterinary and Agricultural University, European Commission, CTA, IFS. Frederiksberg : DSR Boghandel, 407-412. ISBN 87-987082-0-1 International Symposium on Tuberous Legumes. 2, Celaya, Mexique, 5 Août 1996/8 Août 1996.

Autre titre : Compétition tubercules-gousses et réponses à la sécheresse chez l'igname haricot (Pachyrhizus ahipa (Wedd.) Parodi)

Résumé : An experiment was conducted under greenhouse conditions in order to examine the effect of inflorescence pruning on drought responses of the cultivar AC102 (#Pachyrhizus ahipa# (Wedd.) Parodi). Four treatments involving plant with or without reproductive pruning and with and without water stress and the combination of the two factors were included in the experiment. Drought caused a decrease in stomatal conductance, photosynthesis and transpiration rates in both intact and pruned plants. However, whilst leaf-relative-water content (LRWC) was maintained in the pruned plants (P+D), a significant decrease was observed in the intact plants (I+D). The maintenance of LRWC in pruned plants may be due to mobilisation of water within the tuber and/or better redistribution of water from roots to leaves in the absence of pods. Inflorescence pruning improves the adaptation of this crop to drought conditions.

Mots-clés Agrovoc : Pachyrhizus, légume racine, adaptation, sécheresse, taille, inflorescence, teneur en eau

Mots-clés géographiques Agrovoc : Sénégal

Classification Agris : F60 - Physiologie et biochimie végétale

Auteurs et affiliations

• Diouf Ousmane
• Roy-Macauley Harold
• Annerose Daniel, CIRAD-DG-DRE (FRA)

Source : Cirad - Agritrop (https://agritrop.cirad.fr/468049/)

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