Yanjie Liu1, Wayne Dawson2,3, Daniel Prati4, Emily Haeuser2, Yanhao Feng2, Mark van Kleunen2. 1. Ecology, Department of Biology, University of Konstanz, Universitätsstrasse 10, D-78457 Konstanz, Germany yanjie.liu@uni-konstanz.de. 2. Ecology, Department of Biology, University of Konstanz, Universitätsstrasse 10, D-78457 Konstanz, Germany. 3. School of Biological and Biomedical Sciences, Durham University, South Road, Durham DH1 3LE, UK. 4. Institute of Plant Sciences, University of Bern, Altenbergrain 21, CH-3013 Bern, Switzerland.
Abstract
BACKGROUND AND AIMS: It is frequently assumed that phenotypic plasticity can be very advantageous for plants, because it may increase environmental tolerance (fitness homeostasis). This should, however, only hold for plastic responses that are adaptive, i.e. increase fitness. Numerous studies have shown shade-induced increases in specific leaf area (SLA), and there is wide consensus that this plastic response optimizes light capture and thus has to be adaptive. However, it has rarely been tested whether this is really the case. METHODS: In order to identify whether SLA plasticity does contribute to the maintenance of high biomass of plant species under shaded conditions, a meta-analytical approach was employed. The data set included 280 species and 467 individual studies from 32 publications and two unpublished experiments. KEY RESULTS: Plants increased their SLA by 55·4 % on average when shaded, while they decreased their biomass by 59·9 %. Species with a high SLA under high-light control conditions showed a significantly greater ability to maintain biomass production under shade overall. However, in contrast to the expectation of a positive relationship between SLA plasticity and maintenance of plant biomass, the results indicated that species with greater SLA plasticity were less able to maintain biomass under shade. CONCLUSIONS: Although a high SLA per se contributes to biomass homeostasis, there was no evidence that plasticity in SLA contributes to this. Therefore, it is argued that some of the plastic changes that are frequently thought to be adaptive might simply reflect passive responses to the environment, or result as by-products of adaptive plastic responses in other traits.
BACKGROUND AND AIMS: It is frequently assumed that phenotypic plasticity can be very advantageous for plants, because it may increase environmental tolerance (fitness homeostasis). This should, however, only hold for plastic responses that are adaptive, i.e. increase fitness. Numerous studies have shown shade-induced increases in specific leaf area (SLA), and there is wide consensus that this plastic response optimizes light capture and thus has to be adaptive. However, it has rarely been tested whether this is really the case. METHODS: In order to identify whether SLA plasticity does contribute to the maintenance of high biomass of plant species under shaded conditions, a meta-analytical approach was employed. The data set included 280 species and 467 individual studies from 32 publications and two unpublished experiments. KEY RESULTS: Plants increased their SLA by 55·4 % on average when shaded, while they decreased their biomass by 59·9 %. Species with a high SLA under high-light control conditions showed a significantly greater ability to maintain biomass production under shade overall. However, in contrast to the expectation of a positive relationship between SLA plasticity and maintenance of plant biomass, the results indicated that species with greater SLA plasticity were less able to maintain biomass under shade. CONCLUSIONS: Although a high SLA per se contributes to biomass homeostasis, there was no evidence that plasticity in SLA contributes to this. Therefore, it is argued that some of the plastic changes that are frequently thought to be adaptive might simply reflect passive responses to the environment, or result as by-products of adaptive plastic responses in other traits.
Authors: Charlotte M M Gommers; Eric J W Visser; Kate R St Onge; Laurentius A C J Voesenek; Ronald Pierik Journal: Trends Plant Sci Date: 2012-10-17 Impact factor: 18.313
Authors: Christina L Richards; Oliver Bossdorf; Norris Z Muth; Jessica Gurevitch; Massimo Pigliucci Journal: Ecol Lett Date: 2006-08 Impact factor: 9.492
Authors: Tereza Konvalinková; David Püschel; Martina Janoušková; Milan Gryndler; Jan Jansa Journal: Front Plant Sci Date: 2015-02-13 Impact factor: 5.753
Authors: Juan Carlos Suárez Salazar; Luz Marina Melgarejo; Fernando Casanoves; Julio A Di Rienzo; Fabio M DaMatta; Cristina Armas Journal: PLoS One Date: 2018-11-01 Impact factor: 3.240
Authors: Keila Rêgo Mendes; Willian Batista-Silva; Jaqueline Dias-Pereira; Marcos P S Pereira; Eliane V Souza; José E Serrão; João A A Granja; Eugênia C Pereira; David J Gallacher; Pedro R Mutti; Duany T C da Silva; Rogério S de Souza Júnior; Gabriel B Costa; Bergson G Bezerra; Cláudio M Santos E Silva; Marcelo F Pompelli Journal: Sci Rep Date: 2022-01-19 Impact factor: 4.996