Among- and within-population variation in germination response shapes ecological resilience in the Mediterranean cliff species Brassica incana Ten.

Autor:	Laccetti L; Department of Biology, University Federico II of Naples, Complesso Universitario MSA, Naples, Italy., Cruz Tejada DM; Department of Biology, University of Pisa, Pisa, Italy., Mo A; Department of Biology, University of Pisa, Pisa, Italy., Carta A; Department of Biology, University of Pisa, Pisa, Italy., Scopece G; Department of Biology, University Federico II of Naples, Complesso Universitario MSA, Naples, Italy.
Jazyk:	angličtina
Zdroj:	Annals of botany [Ann Bot] 2024 Sep 24. Date of Electronic Publication: 2024 Sep 24.
DOI:	10.1093/aob/mcae172
Abstrakt:	Background and Aims: Understanding how plant species respond to extreme conditions is crucial for predicting their ecological resilience under climate change. Here, we aim to forecast the ecological resilience of the Mediterranean cliff species Brassica incana (Brassicaceae) by estimating population variation in germination response under novel extreme environmental conditions. Methods: We investigated the thermal germination responses in 14 populations of B. incana by exposing seeds to temperatures within and outside conditions experienced in their local environment. Then, we quantified among- and within-population variation in germination response to extreme temperatures, estimated genotype-by-environment interactions (G × E) and tested if population performance at extreme temperatures is explained by local climate. Key Results: We found significant among-population differences in germination response, a different level of within-population variability, and different mechanisms underlying G × E patterns. Also, populations experiencing warmer temperatures in their local environment showed a better performance at both cold and hot extremes while populations experiencing colder temperatures showed a limited ability to germinate under extreme conditions. Conclusions: Our results suggest that populations experiencing warmer temperatures in their local environment have a higher potential to face future thermal extreme conditions and their role is thus crucial to promote species ecological resilience. (© The Author(s) 2024. Published by Oxford University Press on behalf of the Annals of Botany Company. All rights reserved. For commercial re-use, please contact reprints@oup.com for reprints and translation rights for reprints. All other permissions can be obtained through our RightsLink service via the Permissions link on the article page on our site—for further information please contact journals.permissions@oup.com.)
Databáze:	MEDLINE
Externí odkaz:	Zobrazit plný text záznamu