The seed germination spectrum of alpine plants : a global meta-analysis

Bibliographische Detailangaben
Veröffentlicht in:	The New phytologist. - 1979. - 229(2021), 6 vom: 01. März, Seite 3573-3586
1. Verfasser:	Fernández-Pascual, Eduardo (VerfasserIn)
Weitere Verfasser:	Carta, Angelino, Mondoni, Andrea, Cavieres, Lohengrin A, Rosbakh, Sergey, Venn, Susanna, Satyanti, Annisa, Guja, Lydia, Briceño, Verónica F, Vandelook, Filip, Mattana, Efisio, Saatkamp, Arne, Bu, Haiyan, Sommerville, Karen, Poschlod, Peter, Liu, Kun, Nicotra, Adrienne, Jiménez-Alfaro, Borja
Format:	Online-Aufsatz
Sprache:	English
Veröffentlicht:	2021
Zugriff auf das übergeordnete Werk:	The New phytologist
Schlagworte:	Journal Article Meta-Analysis Research Support, Non-U.S. Gov't alpine alternating temperature cold stratification embryo endosperm ratio light germination seed dormancy seed germination seed mass

Beschreibung
Zusammenfassung:	© 2020 The Authors New Phytologist © 2020 New Phytologist Foundation. Assumptions about the germination ecology of alpine plants are presently based on individual species and local studies. A current challenge is to synthesise, at the global level, the alpine seed ecological spectrum. We performed a meta-analysis of primary data from laboratory experiments conducted across four continents (excluding the tropics) and 661 species, to estimate the influence of six environmental cues on germination proportion, mean germination time and germination synchrony; accounting for seed morphology (mass, embryo : seed ratio) and phylogeny. Most alpine plants show physiological seed dormancy, a strong need for cold stratification, warm-cued germination and positive germination responses to light and alternating temperatures. Species restricted to the alpine belt have a higher preference for warm temperatures and a stronger response to cold stratification than species whose distribution extends also below the treeline. Seed mass, embryo size and phylogeny have strong constraining effects on germination responses to the environment. Globally, overwintering and warm temperatures are key drivers of germination in alpine habitats. The interplay between germination physiology and seed morphological traits further reflects pressures to avoid frost or drought stress. Our results indicate the convergence, at the global level, of the seed germination patterns of alpine species
Beschreibung:	Date Completed 14.05.2021 Date Revised 14.05.2021 published: Print-Electronic Citation Status MEDLINE
ISSN:	1469-8137
DOI:	10.1111/nph.17086