Article (Scientific journals)
Drought stress inducing intraspecific variability in Potentilla tabernaemontani (Rosaceae), a calcareous grassland species
Harzé, Mélanie; Mahy, Grégory; Monty, Arnaud
2018In Plant Ecology and Evolution, 151 (1), p. 153-158
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Keywords :
Calcareous grasslands; Climate change; Drought stress; Ex situ; Greenhouse; Intraspecific variability; Local scale
Abstract :
[en] Background and aims – Calcareous grasslands are among the most species-rich habitats in Western Europe. Populations of plant species characterizing these ecosystems are naturally submitted to high variability in environmental conditions at the very local scale, resulting in pronounced variation in functional traits. Individuals located on xeric parts of calcareous grasslands are characterized by plant traits that potentially ensure more successful performance under stressful conditions. In the context of increased frequency of summer heat waves based on climate change, our aim was to determine a possible intraspecific variability in drought response among individuals of one calcareous grassland plant species. Methods – A greenhouse experiment was set up to follow survival of Potentilla tabernaemontani Asch. individuals according to their habitat of origin (xeric or mesic parts of Belgian calcareous grasslands) and the treatment applied (low or high drought stress). Key results – The results demonstrated that individuals originating from xeric parts survived drought stress better than individuals from mesic parts of calcareous grasslands. Specific leaf area (SLA) of all individuals was very low in the experiment, allowing them to decrease water loss during drought stress. Leaf production was lower for individuals exposed to high drought stress while flower production was higher. That potentially expressed a trade-off between tolerance to water stress, individual growth and reproduction. Conclusions – Local scale environmental heterogeneity deserves to be considered in conservation and restoration plans as it induces intraspecific functional variability between individuals and impacts individuals’ ability to survive drought stress. © 2018 Botanic Garden Meise and Royal Botanical Society of Belgium.
Disciplines :
Environmental sciences & ecology
Author, co-author :
Harzé, Mélanie ;  University of Liège, Gembloux Agro-Bio Tech, Biodiversity and landscape Unit, 2, Passage des Déportés, Gembloux, Belgium
Mahy, Grégory ;  Université de Liège - ULiège > Ingénierie des biosystèmes (Biose) > Biodiversité et Paysage
Monty, Arnaud ;  Université de Liège - ULiège > Ingénierie des biosystèmes (Biose) > Biodiversité et Paysage
Language :
English
Title :
Drought stress inducing intraspecific variability in Potentilla tabernaemontani (Rosaceae), a calcareous grassland species
Publication date :
2018
Journal title :
Plant Ecology and Evolution
ISSN :
2032-3913
eISSN :
2032-3921
Publisher :
Societe Royale de Botanique de Belgique
Volume :
151
Issue :
1
Pages :
153-158
Peer reviewed :
Peer Reviewed verified by ORBi
Available on ORBi :
since 02 February 2021

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