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<p>Impermeable seed/fruit coats, i.e., physical dormancy (PY), occurs only in several genera belonging to 19 angiosperm families. However, recent reviews on fire ecology have proposed including serotiny under PY and dormancy-broken seeds waiting for germination as ‘imposed secondary dormancy’. Serotiny occurs in 12 angiosperm and gymnosperm families, mutually exclusive from PY families, suggesting no linkage between these two traits. Imposed secondary dormancy essentially refers to the non-dormant seeds waiting for germination, as no dormancy-breaking treatments are required for germination. Understanding the evolutionary and ecological significance of PY is imperative, one of the first steps in this direction is to correctly define the seed traits. In contemporary species, the ability of PY to develop impermeable or permeable coats is under the influence of climate.</p>

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Definition, deviation and distraction: the burning questions in physical dormancy and fire ecology

  • 期刊论文

  • 发表日期：

    2025年2月21日

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  • Ganesh K. Jaganathan

摘要

Impermeable seed/fruit coats, i.e., physical dormancy (PY), occurs only in several genera belonging to 19 angiosperm families. However, recent reviews on fire ecology have proposed including serotiny under PY and dormancy-broken seeds waiting for germination as ‘imposed secondary dormancy’. Serotiny occurs in 12 angiosperm and gymnosperm families, mutually exclusive from PY families, suggesting no linkage between these two traits. Imposed secondary dormancy essentially refers to the non-dormant seeds waiting for germination, as no dormancy-breaking treatments are required for germination. Understanding the evolutionary and ecological significance of PY is imperative, one of the first steps in this direction is to correctly define the seed traits. In contemporary species, the ability of PY to develop impermeable or permeable coats is under the influence of climate.