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Research Journal of Seed Science
  Year: 2019 | Volume: 12 | Issue: 1 | Page No.: 1-9
DOI: 10.3923/rjss.2019.1.9
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Desiccation, Germination and Water Sorption Isotherm of Garcinia afzelii Engl. (Clusiaceae) Seeds

Joseph Mireku Asomaning and Moctar Sacandé

Background and Objectives: Seed desiccation sensitivity is a constraint to handling of Garcinia afzelii. A study was thus conducted to determine the effect of drying on germination and vigour of the species in order to help recommend a proper seed handling technique. Materials and Methods: Matured fruits were harvested in April, 2014 and 2015 from a plantation at Ho in the Volta Region of Ghana. Depulped seeds were mixed with moistened sawdust and placed in white cotton sacks and quickly transported by air to the Seed Conversation Department of the Royal Botanic Gardens in the United Kingdom where a part of the experiment was carried out. The second season’s collection was used for another part of the studies in Ghana. Seeds were dried in silica gel and on the laboratory worktable at room temperature (28-31°C) and evaluated for germination and vigour. Sorption isotherm curve was developed by equilibrating seeds over a series of Lithium Chloride (LiCl) solutions with varying RHs and silica gel with 5% RH also at room temperature. Results: Seed germination percentage decreased gradually with reduction in seed moisture content until after 25% moisture content when germination percentage reduced drastically to 43%. Seedling dry weight, seed vigour index and speed of germination also decreased as seeds were dried. Electrical conductivity of leachate from seeds increased with desiccation of seeds. Water sorption isotherm curve however, showed the typical sigmoid shape curve. Conclusion: The seeds of G. afzelii were desiccation sensitive, with ‘critical moisture content’ of 25%.
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How to cite this article:

Joseph Mireku Asomaning and Moctar Sacandé, 2019. Desiccation, Germination and Water Sorption Isotherm of Garcinia afzelii Engl. (Clusiaceae) Seeds. Research Journal of Seed Science, 12: 1-9.

DOI: 10.3923/rjss.2019.1.9


30 August, 2019
Maxwell Aubrey Chimombo:
The paper is awesome,it has helped me alot in my research proposal as am looking forward to do a research on the effect of seed maturity on germination of strychnos cocculoides.




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