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Vol. 18 No. 2 (2024)
In press / En imprenta

Vegetable section

Breaking of dormancy in hawthorn yam (Dioscorea rotundata [Poir.]) by applying plant growth regulators

https://doi.org/10.17584/rcch.2024v18i2.17697

Published 2024-05-01

  • Amir-José Serpa-Ortega
    • ,
  • Manuel-Ramón Espinosa-Carvajal
    • ,
  • Diana-Beatriz Sánchez-López

Amir-José Serpa-Ortega
Colombian Agricultural Research Corporation-Agrosavia, Turipaná Research Center, Cerete (Colombia)

Manuel-Ramón Espinosa-Carvajal
Colombian Agricultural Research Corporation-Agrosavia, Turipaná Research Center, Cerete (Colombia)

Diana-Beatriz Sánchez-López
Colombian Agricultural Research Corporation-Agrosavia, Turipaná Research Center, Cerete (Colombia)

Breaking dormancy in apical, middle, and basal sections of hawthorn yam. Photo: D.-B. Sánchez-López

Abstract

Dormancy in hawthorn yam (Dioscorea rotundata [Poir.]) tubers poses challenges during storage and field planting due to prolonged dormancy periods, leading to fungal attacks and reduced sowing density. This study aimed to explore the efficacy of plant growth regulators (PGRs) in inducing early sprouting in commercial hawthorn yam tubers to mitigate these issues. Tubers were divided into apical, middle, and basal sections, treated with various PGRs, and sown in sterile substrate. Thiourea at 1 g L-1 emerged as the most effective treatment, promoting the highest percentage of sprouting across all observation periods. Thiourea at 2 g L-1 proved efficient for apical and middle sections, while mepiquat chloride at 2 mL L-1 stimulated sprouting in the basal part. These findings demonstrate the potential of PGRs in inducing early sprouting and enhancing germination uniformity in hawthorn yam tubers, offering practical implications for improved crop management.

Keywords

Vegetative propagation, Plantation crops, Sprouting, Storage, Dormancy breakers

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