Within-crown Foliar Plasticity of Western Hemlock, Tsuga heterophylla, in Relation to Stand Age

Richardson, Andrew D.; Ashton, P.M.S.; Berlyn, Graeme P.; McGroddy, M.E.; Cameron, Ian R.

doi:10.1006/anbo.2001.1538

Cited by 48 publications

(30 citation statements)

References 33 publications

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“…Although Holland and Richardson (2009) reported that stomatal density and guard cell length are both sensitive to environmental conditions and that considerable genotypic variation and phenotypic plasticity occurred in these traits, our study showed that differences among provenances in regards to guard cell length were not statistically significant, despite the decrease of L A in dry year for all provenances (Table 2). This is in agreement with the results presented by other authors, who found that stomatal density appears to be relatively plastic compared to stomatal length (Richardson et al 2001) and therefore, potentially adaptive to environmental change (Lake and Woodward 2008). Our study also showed that stomatal density increased with drought, which is consistent with the results obtained in some other plant species (Klooster and Palmer-Young 2004;Fraser et al 2009).…”

Section: Resultssupporting

confidence: 93%

Phenotypic plasticity of European beech (Fagus sylvatica L.) stomatal features under water deficit assessed in provenance trial

Stojnić¹,

Orlović²,

Trudić³

et al. 2015

Dendrobiology

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Abstract:The results of research into leaf stomatal variability of five European beech provenances originating from Austria, Bosnia and Hercegovina, Germany, Romania and Serbia are presented in this paper. Aim of the study was to investigate how stomatal traits of provenances originating from different environments change in response to drought stress and to assess the phenotypic plasticity of the stomatal features investigated. The study was conducted during two different years, characterized by contrasting weather conditions (2010 and 2011). Two-way ANOVA revealed that provenances differ significantly in terms of stomatal density (SD), width of stomatal aperture (W b ), potential conductance index (PCI) and relative stomatal pore surface (RSPS), during both seasons. In a dry year (2011) all provenances significantly increased stomatal density by between 16.1% (Hasbruch -DE) and 21.9% (Cer -SRB). Guard cell length (L A ) was not statistically different among provenances in either year (2010 and 2011), even though L A decreased in the dry year (2011) in all provenances. Reaction norms were steep in most of the parameters suggesting the possibility of a plastic response of provenances toward changes in soil water regime, influenced by the prevailing weather each year. Phenotypic plasticity indices were the highest in regards of SD, PCI and RSPS, indicating that these traits would be good candidates for improvement in breeding programs aimed at selection of drought resistant.

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Section: Resultssupporting

confidence: 93%

Phenotypic plasticity of European beech (Fagus sylvatica L.) stomatal features under water deficit assessed in provenance trial

Stojnić¹,

Orlović²,

Trudić³

et al. 2015

Dendrobiology

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“…The relative trait range or RTR index is determined from the difference in a trait value of a population in an environment expected to produce a higher trait value compared to that in an environment expected to produce a lower trait value, relative to the maximum value of all populations in both environments (Richardson et al 2001). Positive values indicate the difference is in the direction expected and the magnitude of the value indicates the extent of trait variation (or sensitivity of response).…”

Section: Relative Trait Range Indexmentioning

confidence: 99%

“…Transplant experiments can also reveal the extent to which a species can elicit a range of phenotypes (as measured via the relative trait range or RTR) in response to different environmental conditions and how this response relates to an environmental variable (Richardson et al 2001). In general terms, the RTR index uses an expectation that the response of a population will be higher in one environment than another and is expressed relative to the maximum response of all populations in both environments.…”

Section: Introductionmentioning

confidence: 99%

The role of ecotypic variation and the environment on biomass and nitrogen in a dominant prairie grass

Mendola

Baer

Johnson

et al. 2015

Ecology

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Abstract. Knowledge of the relative strength of evolution and the environment on a phenotype is required to predict species responses to environmental change and decide where to source plant material for ecological restoration. This information is critically needed for dominant species that largely determine the productivity of the central U.S. grassland. We established a reciprocal common garden experiment across a longitudinal gradient to test whether ecotypic variation interacts with the environment to affect growth and nitrogen (N) storage in a dominant grass. We predicted plant growth would increase from west to east, corresponding with increasing precipitation, but differentially among ecotypes due to local adaptation in all ecotypes and a greater range of growth response in ecotypes originating from west to east. We quantified aboveground biomass, root biomass, belowground net primary production (BNPP), root C:N ratio, and N storage in roots of three ecotypes of Andropogon gerardii collected from and reciprocally planted in central Kansas, eastern Kansas, and southern Illinois. Only the ecotype from the most mesic region (southern Illinois) exhibited more growth from west to east. There was evidence for local adaptation in the southern Illinois ecotype by means of the local vs. foreign contrast within a site and the home vs. away contrast when growth in southern Illinois was compared to the most distant site in central Kansas. Root biomass of the eastern Kansas ecotype was higher at home than at either away site. The ecotype from the driest region, central Kansas, exhibited the least response across the environmental gradient, resulting in a positive relationship between the range of biomass response and precipitation in ecotype region of origin. Across all sites, ecotypes varied in root C:N ratio (highest in the driest-origin ecotype) and N storage in roots (highest in the most mesic-origin ecotype). The low and limited range of biomass, higher C:N ratio of roots, and lower N storage in the central Kansas ecotype relative to the southern Illinois ecotype suggests that introducing ecotypes of A. gerardii from much drier regions into highly mesic prairie would reduce productivity and alter belowground ecosystem processes under a wide range of conditions.

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“…Therefore, to predict the responses of plant communities to environmental change, it is necessary to assess the relative contribution of intraspecific variation and species replacement in variations in functional traits (Kichenin et al 2013). In most previous studies, intraspecific variation has been considered to be far less important than species replacement (Albert et al 2011, Richardson et al 2001. However, recent studies have shown that this assumption is not always met (Lecerf & Chauvet 2008, Messier et al 2010, and increasing evidence has demonstrated that intraspecific variation actually plays a crucial role in community composition (Cornwell & Ackerly 2009, Jung et al 2010.…”

Section: Introductionmentioning

confidence: 99%

Environmental filtering drives herb community composition and functional trait changes across an elevational gradient

Jiang¹,

Ma²

2015

Plecevo

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Within-crown Foliar Plasticity of Western Hemlock, Tsuga heterophylla, in Relation to Stand Age

Cited by 48 publications

References 33 publications

Phenotypic plasticity of European beech (Fagus sylvatica L.) stomatal features under water deficit assessed in provenance trial

Phenotypic plasticity of European beech (Fagus sylvatica L.) stomatal features under water deficit assessed in provenance trial

The role of ecotypic variation and the environment on biomass and nitrogen in a dominant prairie grass

Environmental filtering drives herb community composition and functional trait changes across an elevational gradient

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