Cistus species have seeds with hard coats which impose physical seed dormancy that can be released after seed scarification. In fire-prone habitats, the break of physical seed dormancy is usually related to the heat produced during fires. It is commonly accepted that most hard-seeded species, including those of the genus Cistus, are able to germinate under a wide range of temperatures in light as well as in darkness, once the seed becomes permeable. However, although many studies have focused on the release of physical dormancy only, a few have done so on the effect of environmental factors once dormancy is released. In this research, through a factorial experiment, we analysed the effects of light (light and darkness) and a range of temperatures (10, 15, 20, 25 and 30°C) on the seed germination of eight Cistus species after a heat shock. On average, almost 60% of the seeds did not germinate despite being viable, and this lack of germination increased with higher temperatures during the treatment. Although an idiosyncratic germination response emerged, temperature had a significant effect in all the species, reaching the highest levels of germination between 10 and 20°C. Light interacted with temperature in four cases by increasing the germination, especially under the least favourable temperatures. Environmental factors, such as temperature and light, appear to modulate the germination of the studied Cistus species after the release of physical seed dormancy.

岩蔷薇物种的种子具有坚硬的外壳，可在种子划伤后释放物理种子休眠。在易发生火灾的栖息地，物理种子休眠的中断通常与火灾期间产生的热量有关。人们普遍认为，大多数硬种子物种，包括岩蔷薇属，一旦种子变得可渗透，就能够在光照和黑暗中的各种温度下发芽。然而，尽管许多研究只关注物理休眠的释放，但也有少数研究关注休眠释放后环境因素的影响。在这项研究中，通过析因实验，我们分析了光照（明暗）和温度范围（10、15、20、25 和 30°C）对八种岩蔷薇种子萌发的影响。热休克后的物种。平均而言，尽管有活力，但几乎 60% 的种子没有发芽，并且在处理过程中，随着温度的升高，这种缺乏发芽的情况增加。尽管出现了特殊的发芽反应，但温度对所有物种都有显着影响，在 10 到 20°C 之间达到最高发芽水平。在四种情况下，光通过增加发芽率与温度相互作用，尤其是在最不利的温度下。在物理种子休眠释放后，环境因素，如温度和光线，似乎会调节所研究的岩蔷薇物种的萌发。