Abstract

NATURA-2000, the ecological network of protected areas in the European Union that has been included in the Croatian legislation, defines Community important plant species with imperative on their conservation ex/in situ. In the Botanical Garden of the Faculty of Science, University of Zagreb, five NATURA-species have been selected as research subjects for germination study to shed light on the topic of their seed ecology and consequently advance their conservation efforts: Degenia velebitica, Scilla litardierei, Klasea lycopifolia, Ligularia sibirica and Genista holopetala. The freshly matured seeds of each species were exposed to cold or warm stratification in duration of four to sixteen weeks, and their germination was investigated through different regimes of incubation parameters, i.e. illumination (light/dark) and temperature (5, 15/6, 23 °C). All species had higher germination values after cold stratification, with the exception of G. holopetala. We concluded that D. velebitica, K. lycopifolia and presumably L. sibirica seeds has non-deep physiological dormancy while S. litardierei has deep complex morphophysiological dormancy and G. holopetala has physical dormancy. The observed patterns in seeds’ behaviour are consistent with the conditions in their natural habitats in Croatia and the knowledge of these patterns is vital for successful conservation strategies in the future.

摘要

NATURA-2000，在欧盟已列入克罗地亚立法保护区的生态网络，定义社区重要的植物物种有必要对他们的保护EX /原位。在萨格勒布大学理学院植物园中，已经选择了五个NATURA物种作为发芽研究的研究对象，从而阐明了它们的种子生态学主题，从而推进了其保护工作：Degenia velebitica，Scilla litardierei， Klasea lycopifolia，Ligularia sibirica和Genista holopetala。将每种物种的新鲜成熟种子在4到16周的时间内暴露于冷或温分层之下，并通过不同的孵育参数制度（例如光照（明/暗）和温度（5、15 / 6， 23°C）。冷复层后，所有物种的发芽值均较高，除了霍乱锥菌外。我们得出的结论是，D。velebitica，K。lycopifolia和推测的L. sibirica种子具有非深层的生理休眠，而S. litardierei具有深深的复杂形态生理休眠和G. holopetala有身体上的休眠。观察到的种子行为方式与克罗地亚自然栖息地的条件一致，对这些方式的了解对于将来成功的保护策略至关重要。