Author(s)

Dibi Konan Evrard Brice^1*, Kouakou Amani Michel¹, Amari Ler-Ogn Dadé Georges Elisée², Brouth Lorng Jean Bernard², Dossou-Aminon Innocent³, Essis Brice Sidoine¹, N’zue Boni¹, Dick Acka Emmanuel²

¹Root and Tuber Crops Program, Food Crops Research Station, National Centre for Agronomic Research-CNRA, Bouake, Cote d’Ivoire.
²Laboratory of Plant Physiology, Biosciences Training and Research Unit, Felix Houphouet-Boigny University, Abidjan, Cote d’Ivoire.
³Faculty of Science and Technology of Dassa, University of Abomey-Calavi, Abomey-Calavi, Benin.

Vine cutting is an effective solution to solve the problem of seed availability in yam cultivation. This study was conducted to improve the recovery and rooting rate of vine cuttings of Dioscorea rotundata. Two-node cuttings from five (5)-month-old hybrid plants were grown in liquid media consisting of phytohormones (AIA₃ and GA₃) and liquid fertilizer (NPK 8-8-8) at different concentrations. Observations were made weekly from the 21st day after transplanting and focused on the survival rate of the cuttings, the number of roots emitted and the number of minitubers initiated. The results obtained showed a significant effect of the different growing media on the survival rate, rooting and production of minitubers. The best survival rates were obtained for cuttings grown in NPK (8-8-8) at 0.25% (100%) and AIA₃ at 25 ppm (93.3%). The highest averages root number was recorded with growing media containing 0.25% NPK 8-8-8 (20.3) and 25 ppm AIA₃ (17.7). Growing media with 0.25% NPK (8-8-8) and 25 ppm AIA₃ provided the highest average numbers of minitubers initiated, respectively 5 and 4.6. Growing medium containing 0.25% NPK 8-8-8 has been identified as the one that allows better roots emission and minitubers production by yam vines cuttings.

Yam, Vine Cutting, Yam Seed, Growing Medium, Dioscorea rotundata

Brice, D. , Michel, K. , Elisée, A. , Bernard, B. , Innocent, D. , Sidoine, E. , Boni, N. and Emmanuel, D. (2019) Effect of Plant Growth Hormones and Liquid Fertilizer on Rooting and Tuberization of Yam (Dioscorea rotundata Poir.) Vine Cuttings. American Journal of Plant Sciences, 10, 1903-1920. doi: 10.4236/ajps.2019.1010134.