RT Journal Article
T1 Seed Dormancy and Seedling Ecophysiology Reveal the Ecological Amplitude of the Threatened Endemism Picris willkommii (Schultz Bip.) Nyman (Asteraceae)
A1 Fernández Martínez, Manuel
A1 Tapias Martín, Raúl
AB Plant communities can undergo drastic changes in their composition if the ecosystem isseverely altered by human actions or climate change. These changes endanger any vulnerable species, mainly if it lives in a small area, as is the case of Picris willkommii (Schultz Bip.) Nyman. Therefore, it is essential to know how an ecosystem alteration could affect the seasonal pattern of the lifecycle, seed production, germination time, as well as both plant emergence and development. Duringthree consecutive years, the growth phenology and seed morpho-physiological traits of Picriswillkommii were assessed, as well as the environmental factors that affect them (light, temperature,substrate). Under natural conditions, germination is in early autumn (15–25 °C air temperature),flowering is in spring, and seed maturation in late spring. The species produces two types of seedsdifferentiated in the degree of dormancy and other morpho–physiological traits, which contributesto the dispersal and spreading capacity; it prefers fine-textured limestone substrates with high Nand P availability; it does not tolerate frosts below −5 °C; and it is able to acclimatize to changingenvironmental conditions, but there is a risk of being replaced by other more aggressive species. Allof this is useful for species conservation programs
PB MDPI
SN 2223-7747 (electrónico)
YR 2022
FD 2022-07
LK http://hdl.handle.net/10272/21147
UL http://hdl.handle.net/10272/21147
LA eng
NO Fernández, M., & Tapias, R. (2022). Seed Dormancy and Seedling Ecophysiology Reveal the Ecological Amplitude of the Threatened Endemism Picris willkommii (Schultz Bip.) Nyman (Asteraceae). In Plants (Vol. 11, Issue 15, p. 1981). MDPI AG. https://doi.org/10.3390/plants11151981
NO The authors want to thank the support of the Andalusian Government forproviding some batches of seeds and allowing the study of this species; and the support of Ricardo Arribas, the company Dintel Domus S.A. and the Ayamonte´s city council for the acquisition ofmaterials for experimentation and for their help in field trips
DS Repositorio Institucional de la Universidad de Huelva
RD 17 jun 2026