Publications Scientifiques

[ Article ] Enhancing germination and seedling growth in Vitex doniana Sweet for horticultural prospects and conservation of genetic resources

Date de soumission: 16-03-2018
Année de Publication: 2014
Entité/Laboratoire Horticulture Gennetics Unit
Document type : Article
Discipline(s) : Génétique et Amélioration des Plantes
Titre Enhancing germination and seedling growth in Vitex doniana Sweet for horticultural prospects and conservation of genetic resources
Auteurs N'Danikou Sognigbé [1], Achigan-Dako Enoch Gbenato [2], Tchokponhoué Dèdéou Apocalypse [3], ASSOGBA KOMLAN Françoise [4], Gebauer Jens [5], VODOUHE RAYMOND [6], AHANCHEDE ADAM [0],
Journal: Fruits
Catégorie Journal: Internationale
Impact factor: 1.27
Volume Journal: 69
DOI: 10.1051/fruits/2014017
Resume Many fruit trees with a hard seed coat exhibit seed dormancy, posing problems for their regeneration. Vitex doniana, an indigenous multipurpose but threatened fruit and vegetable tree that supports the livelihoods of many households in West Africa, is a typical example. Materials and methods. In our research, we evaluated five dormancy-breaking treatments. We tested the effects of sulphuric acid at 95% concentration (T1); 3 d sun-drying + 48 h soaking in tap water (T2); 3 d alternation of 8 h sun-drying + 1 h soaking in tap water (T3); 2 weeks sun-drying with regular watering in the daytime (T4); and physical shock (T5). These treatments were compared with two controls (T0 and Tc), with seeds from two different sources. The germination percentage, mean germination time, time to first germination and time to threshold germination (20%) were compared; the seedling height, diameter and biomass produced were monitored for 15 weeks. We used generalised linear models and correlation tests to compare the effects of the various treatments on germination and seedling growth. Results and discussion. T3 significantly enhanced seed germination in V. doniana (72% after 12 months). T4 best promoted homogeneity in germination (p < 0.01), followed by T3. The best seedling growth was obtained with T4 and T3. Alternation of sun-drying followed by soaking of seeds, a technique with almost no cost, improved seed germination in V. doniana and, in 33 d, just over 1 month, 20% germination can be achieved. Vitex doniana is a fast-growing species (at the nursery stage), in contrast to the common opinion. Conclusion. Our method should be further investigated to assess the adequate soaking and drying length so as to speed up germination and reach homogenous cohorts.
Mots clés Bénin / Vitex doniana / domestication des plantes / reproduction sexuée / dormance des semences / germination des graines / plantule / taux de croissance Benin / Vitex doniana / plant domestication / sexual reproduction / seed dormancy / seed germina
Pages 279 - 291

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