Provenance, genotype, and flooding influence growth and resource acquisition characteristics in a clonal, riparian shrub.

Autor: Palmquist EC; U.S. Geological Survey, Southwest Biological Science Center, Grand Canyon Monitoring and Research Center, 2255 N Gemini Dr, Flagstaff, AZ, 86001, USA.; Department of Biological Sciences, Northern Arizona University, Box 5640, Flagstaff, AZ, 86011, USA., Ogle K; School of Informatics, Computing and Cyber Systems, Northern Arizona University, Box 5693, Flagstaff, AZ, 86011, USA., Whitham TG; Department of Biological Sciences, Northern Arizona University, Box 5640, Flagstaff, AZ, 86011, USA.; Center for Adaptable Western Landscapes (CAWL), Northern Arizona University, Box 5640, Flagstaff, AZ, 86011, USA., Allan GJ; Department of Biological Sciences, Northern Arizona University, Box 5640, Flagstaff, AZ, 86011, USA.; Center for Adaptable Western Landscapes (CAWL), Northern Arizona University, Box 5640, Flagstaff, AZ, 86011, USA., Shafroth PB; U.S. Geological Survey, Fort Collins Science Center, 2150 Centre Ave., Bldg C, Fort Collins, CO, 80526, USA., Butterfield BJ; Department of Biological Sciences, Northern Arizona University, Box 5640, Flagstaff, AZ, 86011, USA.
Jazyk: angličtina
Zdroj: American journal of botany [Am J Bot] 2023 Feb; Vol. 110 (2), pp. e16115. Date of Electronic Publication: 2023 Feb 09.
DOI: 10.1002/ajb2.16115
Abstrakt: Premise: Riparian plants can exhibit intraspecific phenotypic variability across the landscape related to temperature and flooding gradients. Phenotypes that vary across a climate gradient are often partly genetically determined and may differ in their response to inundation. Changes to inundation patterns across a climate gradient could thus result in site-specific inundation responses. Phenotypic variability is more often studied in riparian trees, yet riparian shrubs are key elements of riparian systems and may differ from trees in phenotypic variability and environmental responses.
Methods: We tested whether individuals of a clonal, riparian shrub, Pluchea sericea, collected from provenances spanning a temperature gradient differed in their phenotypes and responses to inundation and to what degree any differences were related to genotype. Plants were subjected to different inundation depths and a subset genotyped. Variables related to growth and resource acquisition were measured and analyzed using hierarchical, multivariate Bayesian linear regressions.
Results: Individuals from different provenances differed in their phenotypes, but not in their response to inundation. Phenotypes were not related to provenance temperature but were partially governed by genotype. Growth was more strongly influenced by inundation, while resource acquisition was more strongly controlled by genotype.
Conclusions: Growth and resource acquisition responses in a clonal, riparian shrub are affected by changes to inundation and plant demographics in unique ways. Shrubs appear to differ from trees in their responses to environmental change. Understanding environmental effects on shrubs separately from those of trees will be a key part of evaluating impacts of environmental change on riparian ecosystems.
(© 2022 The Authors. American Journal of Botany published by Wiley Periodicals LLC on behalf of Botanical Society of America. This article has been contributed to by U.S. Government employees and their work is in the public domain in the USA.)
Databáze: MEDLINE
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