Morphological and physiological variation in western redcedar (Thuja plicata) populations under contrasting soil water conditions

Fan, Shihe; Grossnickle, Steven C.; Russell, John H.

doi:10.1007/s00468-008-0225-8

Cited by 23 publications

(24 citation statements)

References 36 publications

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“…Fan et al (2008) observed that δ 13 C is highly dependant on the environmental conditions and obtained different rankings of redcedar populations under different environments and none relationship between WUE and origin of populations. There are also evidences of the contrary, δ 13 C decreased with summer dryness of the seed sources between ten Pinus contorta populations (Guy and Holowachuck, 2001).…”

Section: G × E Interactionmentioning

confidence: 98%

Phenotypic plasticity in Pinus pinaster δ13C: environment modulates genetic variation

Corcuera¹,

Gil‐Pelegrín²,

Notivol³

2010

Ann. For. Sci.

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Keywords:carbon isotope / phenotypic plasticity / genetic variation / environmental interaction / water use efficiency Abstract • Carbon isotope composition (δ 13 C) is a complex trait involved in acclimation, adaptive processes and related to water use efficiency (WUE) and/or productivity.• To estimate the genetic variation in δ 13 C and growth (h), their relationship, and the genotype by environment interaction effect in both variables, we analyzed three Pinus pinaster populations and six to ten families per population, in two experimental trial sites and in two consecutive years.• δ 13 C increased in the drier site (from -27.15 ± 0.18 to -24.53 ± 0.22) and was more affected by environment (62% of variance) than by genotype.• All populations and families exhibited a high phenotypic plasticity in δ 13 C and increased WUE in the xeric site.• As expected, significant height differences between sites, years, populations and families were displayed. Smaller trees were associated to higher water use efficiency (δ 13 C) in both, mesic and xeric trial sites.• Aridity and continentality enhanced population differences in δ 13 C, therefore, in afforestation programs of arid and continental zones, the selection at the population level would be more efficient than at the family level. In the mesic site, the presence of a high genetic variation in δ 13 C and h between families allows the possibility of a selection for growth and water use efficiency within populations in sub-humid sites.

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Section: G × E Interactionmentioning

confidence: 98%

Phenotypic plasticity in Pinus pinaster δ13C: environment modulates genetic variation

Corcuera¹,

Gil‐Pelegrín²,

Notivol³

2010

Ann. For. Sci.

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“…Thuja plicata is known to be extremely sensitive to water stress (Fan et al 2008), which is why we hypothesized that higher temperatures in urban areas would lead to decreased seedling recruitment and increased seedling mortality, as high temperatures generally increase water stress. However, we did not find lower seedling densities in urban forests compared to rural ones.…”

Section: Urbanization Impacts On T Plicata Recruitment and Growthmentioning

confidence: 99%

Conifer growth and reproduction in urban forest fragments: Predictors of future responses to global change?

2012

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Global change has a large and growing influence on forests, particularly in urban and urbanizing areas. Compared to rural forests, urban forests may experience warmer temperatures, higher CO 2 levels, and greater nitrogen deposition, with exacerbated differences at urban forest edges. Thus, comparing urban to rural forests may help predict future effects of global change on forests. We focused on the conifer western red-cedar (Thuja plicata) to test three hypotheses: at urban forest edges, relative to rural forests and urban forest centers, trees experience 1) higher temperatures and nitrogen levels, 2) lower seedling recruitment, and 3) greater growth. We additionally tested anecdotal reports that 4) tree seedling recruitment in urban and rural forests is much lower than in "pristine" old-growth forests. To test these hypotheses, we quantified air temperature, soil nitrate, adult T. plicata growth and seedling recruitment in five urban and three rural parks at both forest edges and centers. We also quantified T. plicata recruitment at five old-growth "pristine" sites. Temperatures were highest at urban forest edges, and soil nitrate was highest in urban forests. In urban relative to rural forests, we observed greater T. plicata growth, but no difference in seedling densities. However, seedling densities were lower in urban and rural forests than in old-growth forests. In all, our results suggest urban influences enhance adult T. plicata growth, but not seedling recruitment. Recruitment in urban and rural forests was reduced compared to old-growth forests, implying that fragmentation and logging reduce T. plicata seedling recruitment.

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“…Although widely distributed in the region under sharply contrasting environmental conditions, western redcedar has been found to vary little genetically in isozymes (e.g., Yeh, 1988), while there is reported population variation in microsatellites (O'Connell et al, 2001). Significant family variation has been shown for western redcedar in growth rates (Russell et al, 2003;Wang and Russell, 2006) and population variation in physiological and morphological traits (Fan et al, 2008;Grossnickle et al, 2005;Rehfeldt, 1994). Some adaptive genetic variation is known to exist between western redcedar populations (Rehfeldt, 1994), though information on the amount and pattern of this variation in relation to precipitation gradients and soil water regimes is minimal.…”

Section: Introductionmentioning

confidence: 99%

“…These seedlings were grown under a standard container-nursery cultural regime used in British Columbia, Canada (Van Eerden and Gates, 1990). All populations were grown as part of a homogeneous nursery crop population and had statistically similar height, diameter, shoot and root dry weight, before trial initiation (Fan et al, 2008).…”

Section: Plant Materialsmentioning

confidence: 99%

“…The overall program objective was to define the physiological and morphological response of these western redcedar populations to summer time soil and atmospheric water conditions. In companion papers, Grossnickle et al (2005) reports on the gas exchange response and summer-time water use efficiency of the same populations to atmospheric demand under summer time field conditions, while Fan et al (2008) reports on the morphological development and inherent water-use efficiencies of these populations under long-term moderate drought. The objective of this trial was to describe gas exchange parameters, plus drought tolerance and avoidance parameters of seven western redcedar populations in response to short term drought.…”

Section: Introductionmentioning

confidence: 99%

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Variations physiologiques dans des populations de thuyas géants (Thuja plicata Donn ex D. Don) en réponse à une sécheresse courte

Grossnickle¹,

Russell²

2010

Ann. For. Sci.

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Abstract• Variation in the ability of western redcedar (Thuja plicata Donn ex D. Don) populations to withstand water stress may exist because this species is found in coastal and interior biogeoclimatic subzones representing the full range of precipitation regimes in British Columbia, Canada.• Seven western redcedar populations from locations in British Columbia, representing a wide range of habitat types, were assessed for their gas exchange and water relations response to controlled drought.• Before drought, population variation occurred in stomatal conductance, net CO 2 assimilation rate and intrinsic water use efficiency and the relative water content at turgor loss point. During drought, populations had different responses of net CO 2 assimilation to decreasing predawn shoot water potential. After drought, populations differed in stomatal conductance and intrinsic water use efficiency, plus osmotic potential at turgor loss point, osmotic potential at saturation and apparent cuticular transpiration. Western redcedar populations from drier-inland habitats had a lower osmotic potential at turgor loss point, lower relative water content at turgor loss point and lower apparent cuticular transpiration in response to drought than populations from coastal origin with temperate maritime habitat.• Reduction of cuticular water loss and adjustments of cellular water relations in response to drought was found to occur among seven western redcedar populations originating along a precipitation gradient while; there were minimal population differences in the gas exchange response to drought.Mots-clés : performances de populations de thuyas géants / échanges gazeux / relations hydriques / réponse à la sécheresse Résumé -Variations physiologiques dans des populations de thuyas géants (Thuja plicata Donn ex D. Don) en réponse à une sécheresse courte.• Les variations de capacité à résister au déficit hydrique dans des populations de thuyas géants (Thuja plicata Donn Ex D. Don) apparaissent parce que cette espèce se rencontre dans les sous-zones biogéoclimatiques côtières et de l'intérieur représentant l'éventail complet de régimes de précipitations en Colombie britannique (Canada).• Sept populations de thuyas géants issues de sites de Colombie britannique, représentant un large éventail des types d'habitats, ont été évaluées pour leurs échanges gazeux et leurs relations hydriques en réponse à une sécheresse contrôlée.• Avant la sécheresse, une variabilité existait entre populations pour la conductance stomatique, l'assimilation nette de CO 2 , l'efficience intrinsèque d'utilisation de l'eau et la teneur relative en eau au point de perte de turgescence. Pendant la sécheresse, les populations ont présenté des réponses diffé-rentes de l'assimilation nette de CO 2 à la baisse du potentiel hydrique de base. Après la sécheresse, les populations différaient en conductance stomatique et efficience intrinsèque d'utilisation de l'eau, mais également en potentiel osmotique au point de perte de turgescence, en potentiel osmotique à satura...

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Morphological and physiological variation in western redcedar (Thuja plicata) populations under contrasting soil water conditions

Cited by 23 publications

References 36 publications

Phenotypic plasticity in Pinus pinaster δ13C: environment modulates genetic variation

Phenotypic plasticity in Pinus pinaster δ13C: environment modulates genetic variation

Conifer growth and reproduction in urban forest fragments: Predictors of future responses to global change?

Variations physiologiques dans des populations de thuyas géants (Thuja plicata Donn ex D. Don) en réponse à une sécheresse courte

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