Oak morphological traits: Between taxa and environmental variability

Stephan, Jean; Teeny, Pamela W.; Vessella, Federico; Schirone, Bartolomeo

doi:10.1016/j.flora.2018.04.001

Cited by 12 publications

(9 citation statements)

References 26 publications

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“…The CVA and DA results suggest that the hybrids' leaf shapes were affected by both parental species, but most strongly by the dominant species, Q. aliena. Interestingly, a corresponding pattern of variation in hybrids and parental species has been observed in populations of European white oaks (Quercus frainetto and Quercus petraea) (Viscosi et al 2012;Stephan et al 2018). This phenomenon may be caused by extensive and imbalanced gene flow between oak species (Gerber et al 2014) but needs further investigation.…”

Section: Discussionmentioning

confidence: 66%

Geometric morphometric analyses of leaf shapes in two sympatric Chinese oaks: Quercus dentata Thunberg and Quercus aliena Blume (Fagaceae)

Yuan

Song

et al. 2018

Annals of Forest Science

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& Key message Geometric morphometric analyses (GMMs) of the leaf shape can distinguish two congeneric oak species Quercus dentata Thunberg and Quercus aliena Blume in sympatric areas. & Contexts High genetic and morphological variation in different Quercus species hinder efforts to distinguish them. In China, Q. dentata and Q. aliena are generally sympatrically distributed in warm temperate forests, and share some leaf morphological characteristics. & Aims The aim of this study was to use the morphometric methods to discriminate these sympatric Chinese oaks preliminarily identified from molecular markers. & Methods Three hundred sixty-seven trees of seven sympatric Q. dentata and Q. aliena populations were genetically assigned to one of the two species or hybrids using Bayesian clustering analysis based on nSSR. This grouping served as a priori classification of the trees. Shapes of 1835 leaves from the 367 trees were analyzed in terms of 13 characters (landmarks) by GMMs. Correlations between environmental and leaf morphology parameters were studied using linear regression analyses. & Results The two species were efficiently discriminated by the leaf morphology analyses (96.9 and 95.9% of sampled Q. aliena trees and Q. dentata trees were correctly identified), while putative hybrids between the two species were found to be morphologically intermediate. Moreover, we demonstrated that the leaf morphological variations of Q. aliena, Q. dentata, and their putative hybrids are correlated with environmental factors, possibly because the variation of leaf morphology is part of the response to different habitats and environmental disturbances. & Conclusion GMMs were able to correctly classify individuals from the two species preliminary identified as Q. dentata or Q. aliena by nSSR. The high degree of classification accuracy provided by this approach may be exploited to discriminate other problematic species and highlight its utility in plant ecology and evolution studies.

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Section: Discussionmentioning

confidence: 66%

Geometric morphometric analyses of leaf shapes in two sympatric Chinese oaks: Quercus dentata Thunberg and Quercus aliena Blume (Fagaceae)

Yuan

Song

et al. 2018

Annals of Forest Science

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“…These various geo‐climatic distributions of the species and distance to the sea, elevation and average precipitation are factors that significantly affect foliar morphology. Foliar epidermal variation showing a clear range or trend could be seen in species showing high plasticity to certain environmental conditions (Stephan, Teeny, Vessella, & Schirone, ).…”

Section: Discussionmentioning

confidence: 99%

Taxonomic significance of foliar epidermal morphology in Lamiaceae from Pakistan

Gul

Ahmad

Zafar

et al. 2019

Microscopy Res & Technique

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Foliar micromorphological features are useful to elucidate the taxonomy and systematics of the Lamiaceae species. Leaf epidermal morphology using scanning electron microscopy and light microscopy of 22 Lamiaceae species from 15 genera have been investigated with an aim to solve its taxonomic problem in the correct identification. Various foliar micromorphological features were observed to explain their importance in resolving the correct identification of Lamiaceae taxa. Two main types of trichomes were observed; glandular trichomes (GTs) and nonglandular trichomes (NGTs). GTs were further divided into seven subtypes including the capitate, subsessile capitate, sessile capitate, sunken, barrel, peltate, and clavate. Similarly, NGTs were also divided into simple unicellular and multicellular including conical, falcate, cylindrical, dendrite, papillose, and short hook shape. Quantitative measurement includes the length and width of the trichomes, stomatal complex, epidermal cells, stomata, and trichomes index. Based on the foliar micromorphological characters, a taxonomic key was developed to delimit and correctly identify studied taxa. Further molecular, other anatomical and phylogenetic studies are recommended to strengthen the systematics of Lamiaceae.

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“…Pedunculate oak (Quercus robur L.) is one of the main forest forming species in the Central European forests (Stephan et al, 2018;Mölder et al, 2019). In Ukraine, the area covered with oaks is more than 1.7 million ha (Rumiantsev et al, 2018).…”

Section: Introductionmentioning

confidence: 99%

Pedunculate oak stands in the catchments of the river Vorskla’s tributaries

Tkach¹,

Bondar²,

Rumiantsev³

2020

Folia Oecologica

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The aim of the study was to analyze the origin of oak stands within the catchments of the Vorskla’s tributaries and to describe their state. Covering 60,900 ha, pedunculate oak (Quercus robur L.) stands prevail and cover 51.1% of the total forest area of 119,200 ha in the catchment areas of the River Vorskla’s tributaries. The way oak stands are distributed in regards to trophotopes points at favourable conditions for their growth, as 81.7% of the area is a fresh fertile oak forest site type. Forest stands aged 41–80 years (39.8 % of the total area) and 81–120 years (50.4%) are prevailing. Natural oak stands cover almost 66.5% and planted ones grow at 33.5%. Distribution of oak stands in regards to the functional categories of forests shows a significant predominance of the protective forests. They cover 46.6% of the total area. The commercial forests cover 23.0%, the recreational ones make 18.8% and the forests with conservational, academic, historical and cultural purpose cover 11.6 %. Distribution patterns of oak forests in the catchments of the River Vorskla’s tributaries should be considered in the forest management in order to conserve their biodiversity and enhancing the performance of important environmental, protective, recreational and other functions. The article contains results of the study on the natural regeneration of Quercus robur and other wood species under the canopy of oak stands and on felling sites. The further research perspectives are a thorough study of the stand characteristics and the typological structure of forests in terms of certain wood species in the catchments of rivers all over Ukraine. It will help developing principles for the catchment and landscape zonation.

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Oak morphological traits: Between taxa and environmental variability

Cited by 12 publications

References 26 publications

Geometric morphometric analyses of leaf shapes in two sympatric Chinese oaks: Quercus dentata Thunberg and Quercus aliena Blume (Fagaceae)

Geometric morphometric analyses of leaf shapes in two sympatric Chinese oaks: Quercus dentata Thunberg and Quercus aliena Blume (Fagaceae)

Taxonomic significance of foliar epidermal morphology in Lamiaceae from Pakistan

Pedunculate oak stands in the catchments of the river Vorskla’s tributaries

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