Abstract

Biodiversity has been degraded all around the world due to anthropogenic factors. To counteract this worldwide tendency, ecological restoration programs are expanding. In these programs, the use of native herbaceous species, particularly those endemic or threatened, can be promoted by seeding them but germination requirements for most of these species are unknown. Our research meant to fill this gap of information for six Iberian endemic species suitable to use in restoration actions - Digitalis thapsi, Ferula communis subsp. catalaunica, Linaria amethystea subsp. amethystea, Pterocephalidium diandrum, Sanguisorba hybrida, and Silene scabriflora subsp. scabriflora. Their seed germination behaviour was analysed to establish germination protocols for conservation actions. Three germination conditions were used to simulate different sown seasons. Seeds of all species were tested without pre-treatment and subjected to a cold stratification. Seeds of S. hybrida and P. diandrum were additionally tested with a scarification treatment. All species reached their better germination performance under autumn conditions (15/10 °C; 8/16 hours). In conclusion, for all the six Iberian endemic species tested, germination speed and percentage were suitable for their use in native plants reinforcement.

摘要

由于人为因素，世界各地的生物多样性已经退化。为了对抗这种全球趋势，生态恢复计划正在扩大。在这些计划中，可以通过播种促进使用本地草本植物，特别是那些地方性或受威胁的草本植物，但大多数这些物种的发芽要求尚不清楚。我们的研究旨在填补六种适合用于恢复行动的伊比利亚特有物种的信息空白 -洋地黄、阿魏亚种。catalaunica , Linaria amethystea subsp. 紫水晶、紫檀、地榆、Silene scabriflora subsp . 无花果。分析了它们的种子发芽行为，以建立保护行动的发芽方案。使用三种发芽条件来模拟不同的播种季节。所有物种的种子都在未经预处理的情况下进行了测试，并进行了冷分层。S. hybrida和P. diandrum的种子另外用划痕处理进行了测试。在秋季条件下（15/10 °C；8/16 小时），所有物种都达到了更好的发芽性能。总之，对于所测试的所有六种伊比利亚特有物种，发芽速度和百分比都适合它们用于加强本土植物。