Growth-unit structure in trees: effects of branch category and position on Nothofagus nervosa, N. obliqua and their hybrids (Nothofagaceae)

Puntieri, Javier; Ghirardi, Soledad

doi:10.1007/s00468-010-0435-8

Cited by 8 publications

(9 citation statements)

References 44 publications

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“…Rosenthal et al (2002) reported intermediacy for SLA in three ancient hybrid species of Helianthus resulting from the hybridization between Helianthus annuus and Helianthus petiolaris . On the contrary, Puntieri and Ghirardi (2010) did not observe intermediacy of SLA between native hybrids of Nothofagus nervosa × Nothofagus obliqua and their parental species. In this study, S .…”

Section: Discussioncontrasting

confidence: 66%

Leaf traits in parental and hybrid species of Sorbus (Rosaceae)

Ďurkovič

Kardošová

Čaňová

et al. 2012

American J of Botany

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• Premise of the study: Knowledge of functional leaf traits can provide important insights into the processes structuring plant communities. In the genus Sorbus, the generation of taxonomic novelty through reticulate evolution that gives rise to new microspecies is believed to be driven primarily by a series of interspecific hybridizations among closely related taxa. We tested hypotheses for dispersion of intermediacy across the leaf traits in Sorbus hybrids and for trait linkages with leaf area and specific leaf area. • Methods: Here, we measured and compared the whole complex of growth, vascular, and ecophysiological leaf traits among parental (Sorbus aria, Sorbus aucuparia, Sorbus chamaemespilus) and natural hybrid (Sorbus montisalpae, Sorbus zuzanae) species growing under field conditions. A recently developed atomic force microscopy technique, PeakForce quantitative nanomechanical mapping, was used to characterize the topography of cell wall surfaces of tracheary elements and to map the reduced Young's modulus of elasticity. • Key results: Intermediacy was associated predominantly with leaf growth traits, whereas vascular and ecophysiological traits were mainly parental‐like and transgressive phenotypes. Larger‐leaf species tended to have lower modulus of elasticity values for midrib tracheary element cell walls. Leaves with a biomass investment related to a higher specific leaf area had a lower density. Leaf area‐ and length‐normalized theoretical hydraulic conductivity was related to leaf thickness. • Conclusions: For the whole complex of examined leaf traits, hybrid microspecies were mosaics of parental‐like, intermediate, and transgressive phenotypes. The high proportion of transgressive character expressions found in Sorbus hybrids implies that generation of extreme traits through transgressive segregation played a key role in the speciation process.

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Section: Discussioncontrasting

confidence: 66%

Leaf traits in parental and hybrid species of Sorbus (Rosaceae)

Ďurkovič

Kardošová

Čaňová

et al. 2012

American J of Botany

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“…The methodology employed here to determine the origin of trees, as differences or similarities in the growth pattern of natural trees, should be better studied and tested for future studies, including recent studies in tree architecture and growth-unit structure (e.g. GHIRARDI 2010;PUNTIERI et al, 2013).…”

Section: Comparisons and Relationships Between Dsi And Simentioning

confidence: 99%

DIAMETRIC SITE INDEX: AN ALTERNATIVE METHOD TO ESTIMATE SITE QUALITY IN Nothofagus obliqua AND N. alpina FORESTS

Beltrán

Chauchard

Velásquez

et al. 2016

CERNE

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ABSTRAT:The first step for constructing models of tree growth and yield is site quality assessment. To estimate this attribute, several methodologies are available in which site index (SI) is a standard one. However, this approach, that uses height at a reference age of trees, can be simplified if age is replaced by another reference variable easier to measure. In this case, the diametric site index (DSI) represents the mean height of dominant trees at a reference mean diameter at breast height. The aim of this work was to develop DSI in pure and mixed Nothofagus alpina and N. obliqua forests, and compare these models with the classical proposals based on height-age variables, within the temperate forest of northwestern Patagonia from Argentina, South America. Data originated from temporary plots and stem analyses were used. Tree age and diameter at breast height were obtained from each plot and used for establishing DSI family functions, following the guide-curve methodology. Site classes were proportionally represented among DSI curves of 17.0, 21.5, 26.0, 30.5 and 35.0 m of dominant tree height. Reference diameter instead of reference age can be cautiously used in order to fit site index models. ÍNDICE DE SÍTIO DIAMÉTRICO: UM MÉTODO ALTERNATIVO PARA ESTIMAR A QUALIDADE DO SÍTIO EM FLORESTAS DE Nothofagus obliqua E N. alpinaRESUMO: primeiro passo para a construção de modelos de crescimento e produção de árvores e a avaliação da qualidade do sítio. Para estimar este atributo, várias metodologias estão disponíveis, na qual o índice de sítio (IS) é padrão. No entanto, esta abordagem, que utiliza uma altura na idade de referência, pode ser simplificada se a idade é substituída por outra variável de referência mais fácil de medir. Neste caso, o índice de índice de sítio diamétrico (ISD) representa a altura média das árvores dominantes de um diâmetro à altura do peito referência. O objetivo deste trabalho foi desenvolver ISD para florestas puras e mistas de Nothofagus alpina e N. obliqua, e comparar esses modelos com as propostas clássicas baseadas nas variáveis altura-idade, para a floresta temperada do noroeste da Patagônia da Argentina, América do Sul. Dados provenientes de parcelas temporárias e análises de tronco foram utilizados. Foram obtidos idade e diâmetro à altura do peito de cada parcela e utilizados para o estabelecimento das funções da família DSI, seguindo a metodologia da curva-guia. Classes de sítio foram proporcionalmente representados entre curvas DSI de 17,0; 21,5; 26,0; 30,5 e 35,0 m de altura da árvore dominante. O diâmetro de referência em vez da idade de referência pode ser usado com cautela para ajustar modelos de índice de sítio.

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“…Many biotic and abiotic factors, as suggested by previous studies, may potentially affect allometric relationships, including genetics, ontogeny, size, age, structure, site, climate, and their interactions [2,25,26,31,54,[61][62][63]. As shown in Figures 4 and 5, parameters of the allometric equations for different sites, age groups, and stand densities were heterogeneous at different scales, which implied that site, age, and stand density are attributed to the variation of internode allometry within and among Chinese pine trees.…”

Section: Discussionmentioning

confidence: 99%

Quantifying the Variability of Internode Allometry within and between Trees for Pinus tabulaeformis Carr. Using a Multilevel Nonlinear Mixed-Effect Model

Jun

Lei

Wang

et al. 2014

Forests

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Allometric models of internodes are an important component of Functional-Structural Plant Models (FSPMs), which represent the shape of internodes in tree architecture and help our understanding of resource allocation in organisms. Constant allometry is always assumed in these models. In this paper, multilevel nonlinear mixed-effect models were used to characterize the variability of internode allometry, describing the relationship between the last internode length and biomass of Pinus tabulaeformis Carr. trees within the GreenLab framework. We demonstrated that there is significant variability in allometric relationships at the tree and different-order branch levels, and the variability decreases among levels from trees to first-order branches and, subsequently, to second-order branches. The variability was partially explained by the random effects of site characteristics, stand age, density, and topological position of the internode. Tree-and branch-level-specific allometric models are recommended because they produce unbiased and accurate internode length estimates. The model and method developed in this study are useful for understanding and describing the structure and functioning of trees. OPEN ACCESSForests 2014, 5 2826 Keywords: internode allometry; mixed-effect models; Pinus tabulaeformis Carr.; variance of random effects

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Growth-unit structure in trees: effects of branch category and position on Nothofagus nervosa, N. obliqua and their hybrids (Nothofagaceae)

Cited by 8 publications

References 44 publications

Leaf traits in parental and hybrid species of Sorbus (Rosaceae)

Leaf traits in parental and hybrid species of Sorbus (Rosaceae)

DIAMETRIC SITE INDEX: AN ALTERNATIVE METHOD TO ESTIMATE SITE QUALITY IN Nothofagus obliqua AND N. alpina FORESTS

Quantifying the Variability of Internode Allometry within and between Trees for Pinus tabulaeformis Carr. Using a Multilevel Nonlinear Mixed-Effect Model

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