Intraspecific leaf morphological variation in Quercus dentata Thunb.: a comparison of traditional and geometric morphometric methods, a pilot study

Yang, Kaiyu; Wu, Jianghao; Li, Xinman; Pang, Xinbo; Yuan, Yangchen; Gao, Qi

doi:10.1007/s11676-022-01452-x

Cited by 7 publications

(6 citation statements)

References 73 publications

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“…For this reason, among the most powerful tools of current morphological analysis, which has been used in different taxonomical complexes, geometric morphometrics has the advantage of providing statistical robustness, while the analysis of the shape as a whole will also implicitly evaluate different traits quantified by traditional methods (e.g., leaf length, width, distance between lobes and/or veins). In this way, a detailed analysis of the species hypotheses being tested is possible, including the identification of shape aspects for which the evaluated groups differ the most, therefore contributing to the elaboration of an overall diagnosis for each group of samples from a population perspective (Pérez-Pedraza et al 2021 ; Valencia-Cuevas et al 2015 ; Viscosi et al 2009a , 2010 ; Yang et al 2022 ).…”

Section: Discussionmentioning

confidence: 99%

Leaf morphometric analysis and potential distribution modelling contribute to taxonomic differentiation in the Quercus microphylla complex

De Luna-Bonilla,

Valencia-Á,

Ibarra-Manríquez

et al. 2023

J Plant Res

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Mexico is a major center of evolutionary radiation for the genus Quercus, with oak species occurring across different habitat types and showing a wide variation in morphology and growth form. Despite representing about 20% of Mexican species, scrub oaks have received little attention and even basic aspects of their taxonomy and geographic distribution remain unresolved. In this study, we analyzed the morphological and climatic niche differentiation of scrub oak populations forming a complex constituted by six named species, Quercus cordifolia, Quercus frutex, Quercus intricata, Quercus microphylla, Quercus repanda, Quercus striatula and a distinct morphotype of Q. striatula identified during field and herbarium work (hereafter named Q. striatula II). Samples were obtained from 35 sites covering the geographic distribution of the complex in northern and central Mexico. Morphological differentiation was analyzed through geometric morphometrics of leaf shape and quantification of trichome traits. Our results indicated the presence of two main morphological groups with geographic concordance. The first was formed by Q. frutex, Q. microphylla, Q. repanda and Q. striatula, distributed in the Trans-Mexican Volcanic Belt, the Sierra Madre Occidental and a little portion of the south of the Mexican Altiplano (MA). The second group consists of Q. cordifola, Q. intricata and Q. striatula II, found in the Sierra Madre Oriental and the MA. Therefore, our evidence supports the distinctness of the Q. striatula II morphotype, indicating the need for a taxonomic revision. Within the two groups, morphological differentiation among taxa varied from very clear to low or inexistent (i.e. Q. microphylla-Q. striatula and Q. cordifolia-Q. striatula II) but niche comparisons revealed significant niche differentiation in all pairwise comparisons, highlighting the relevance of integrative approaches for the taxonomic resolution of complicated groups such as the one studied here.

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Section: Discussionmentioning

confidence: 99%

Leaf morphometric analysis and potential distribution modelling contribute to taxonomic differentiation in the Quercus microphylla complex

De Luna-Bonilla,

Valencia-Á,

Ibarra-Manríquez

et al. 2023

J Plant Res

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“…Of the species present, only the species Quercus petrea and Quercus pubescens could not be differentiated using only the morphometric parameters of the leaves. Yang et al (2022) by analyzing variations in leaf morphology in the species Q. dentata in three different locations in Hebei and Heban provinces. The fundamental characters to distinguish the origin of the samples were circularity, leaf width and width-length ratio; with the discriminant analysis these authors were able to classify the samples according to their origin with 74, 68 and 74% of precession.…”

Section: Seomentioning

confidence: 99%

Leaf-based characterization of intermediate forms between Cuban and Honduran mahogany

RODRÍGUEZ COCA,

CIOCÎRLAN,

TROCONES BOGGIANO

et al. 2024

Not Bot Horti Agrobo

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The genus Swietenia includes two mahogany species, Swietenia macrophylla (King.), commonly known as Honduran mahogany, and Swietenia mahagoni (L.) Jacq, commonly known as Cuban mahogany. There are reports of morphologically intermediate forms between Cuban and Honduran mahogany that have been localized in some Caribbean islands. The main objective of this research is to distinguish morphologically intermediate forms between the parental species S. mahagoni and S. macrophylla based on leaf morphological characters. Phenotypic data from a total of 357 mahogany trees were collected in the province of Sancti Spiritus, Cuba. Rachis length, petiole length, leaflet length, leaflet width, number of leaflets and number of nerves were evaluated. Morphological descriptor analysis revealed significant differences in the morphometric variables of the evaluated leaves, with rachis length, number of leaflets, leaflet length, petiole length, leaflet width, and number of nerves being significantly higher in S. macrophylla than in S. mahagoni. ANOVA reflected the variance between all leaf morphological parameters evaluated between the two pure species with statistically significant difference. Using the function obtained in the first DC of the two species, the individuals in the mixed stands were classified into 71 morphologically intermediate forms, 45 S. macrophylla and 64 S. mahagoni. In the second DC with the two species and the morphologically intermediate forms, Wilks’ partial lambda indicates that the variable "leaflet length" with 0.67 contributed most to the overall discrimination.

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“…The extent of lobation is inversely proportional to leaf surface area. Lobation is important in discerning specific vein patterns in the leaf and it can also reflect evolutionary relationships between taxa (Yang et al 2022).…”

Section: General Leaf Characters and Venation Characters Of Cucumis S...mentioning

confidence: 99%

Applications of leaf architecture characters in delineating selected species and infraspecific taxa of Genus Cucumis L. (Cucurbitaceae)

Masungsong,

Banaticla-Hilario,

Belarmino

et al. 2023

webbia

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Leaf venation characters of twelve (12) Cucumis taxa, comprised of eight species, three subspecies, and three varieties were examined to determine patterns of leaf architectural characters and delineate these accessions at the species, subspecies, and variety level. The leaf architecture of twenty-seven accessions representing six taxa were examined and described in this study. Additionally, data on the leaf architecture of another six taxa (represented by 57 accessions) published by Masungsong et al. (2022) were incorporated in the analysis. Results revealed that the twelve (12) taxa of Cucumis primarily varied in blade class, apex angle, primary vein size, secondary vein spacing, tertiary vein angle to primary vein, and areole development. These variations were found consistent with Cucumis species examined in previous studies. A dichotomous key was constructed for the twelve Cucumis taxa using leaf characters derived. Cluster analysis (based on UPGMA) formed two major clusters at 0.130 Gower distance. Cluster I includes Cucumis melo subsp. melo, C. pustulatus, C. melo var. flexuosus, C. melo subsp. agrestis, and C, melo var. texanus which exhibited secondary vein spacing that increases towards the base. while Cluster II is composed of the remaining Cucumis taxa, all displaying irregular secondary vein spacing. Furthermore, sub-clusters were formed based on tertiary vein angle in relation to primary vein, blade class, apex angle, and primary vein size. Results showed that utilizing leaf architecture is an effective technique to describe, characterize and delineate closely related taxa with many similar characters.

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Intraspecific leaf morphological variation in Quercus dentata Thunb.: a comparison of traditional and geometric morphometric methods, a pilot study

Cited by 7 publications

References 73 publications

Leaf morphometric analysis and potential distribution modelling contribute to taxonomic differentiation in the Quercus microphylla complex

Leaf morphometric analysis and potential distribution modelling contribute to taxonomic differentiation in the Quercus microphylla complex

Leaf-based characterization of intermediate forms between Cuban and Honduran mahogany

Applications of leaf architecture characters in delineating selected species and infraspecific taxa of Genus Cucumis L. (Cucurbitaceae)

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