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<p>Seed conservation is vital for restoring wild species, as seeds often mature in the dry season, while restoration happens in the rainy season. Limited seed biology knowledge hampers these efforts. Thus, this study evaluated the storability of thirteen tropical rainforest species from Sri Lanka. Effect of storage at 25, 8 and -20 °C on seed viability and vigour was determined. Seed viability retained 100% in <i>Sonerila rhombifolia</i> and <i>Exacum&#xa0;</i><i>trinervium</i>&#xa0;when stored at 8&#xa0;°C for 12&#xa0;months. Seeds of <i>Melastoma malabathricum</i> showed a nearly 50% increase in germination after storage at 8&#xa0;°C. Viability of other species was reduced to different extents in all the storage temperatures. Results showed that seeds of five desiccation-sensitive species could be stored only for a very short period where the highest viability was obtained for the seeds stored at 25&#xa0;°C. The reduction of vigour of seeds of these species occurs before reduction of germinability which could affect restoration activities as most of the restoration sites have suboptimal conditions for germination. The above information can be applied in forest-based restoration activities and the production of seedlings in nurseries.</p>

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Effect of Storage on Seed Vigour and Germinability of Selected Rainforest Species from Sri Lanka for Seed-Based Forest Restoration

  • 期刊论文

  • 发表日期：

    2025年2月3日

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  • B. R. Chandima P. Samarasinghe,
  • K. M. G. Gehan Jayasuriya,
  • A. M. Thilanka A. Gunaratne,
  • Kingsley W. Dixon

摘要

Seed conservation is vital for restoring wild species, as seeds often mature in the dry season, while restoration happens in the rainy season. Limited seed biology knowledge hampers these efforts. Thus, this study evaluated the storability of thirteen tropical rainforest species from Sri Lanka. Effect of storage at 25, 8 and -20 °C on seed viability and vigour was determined. Seed viability retained 100% in Sonerila rhombifolia and Exacum trinervium when stored at 8 °C for 12 months. Seeds of Melastoma malabathricum showed a nearly 50% increase in germination after storage at 8 °C. Viability of other species was reduced to different extents in all the storage temperatures. Results showed that seeds of five desiccation-sensitive species could be stored only for a very short period where the highest viability was obtained for the seeds stored at 25 °C. The reduction of vigour of seeds of these species occurs before reduction of germinability which could affect restoration activities as most of the restoration sites have suboptimal conditions for germination. The above information can be applied in forest-based restoration activities and the production of seedlings in nurseries.