scholarly journals Taxonomic relationships and population differentiation of the south-western Eurasian Zelkova species inferred in leaf morphology

Dendrobiology ◽  
2021 ◽  
Vol 85 ◽  
pp. 60-77
Author(s):  
Anna K. Jasińska ◽  
Beata Rucińska ◽  
Gregor Kozlowski ◽  
Laurence Fazan ◽  
Giuseppe Garfì ◽  
...  
Keyword(s):  
Principal Component ◽  
Morphological Characters ◽  
Hybrid Origin ◽  
Discrimination Analysis ◽  
Biometric Analysis ◽  
The Third ◽  
South West ◽  
Leaf Variation ◽  
Eurasian Species ◽  
Two Populations

The relict tree species Zelkova abelicea and Z. sicula (Ulmaceae) occur in Crete and Sicily, respectively. Zelkova abelicea grows in approximately 40 localities in the mountains of Crete, while Z. sicula has been found in only two stands in Sicily. We compared 25 morphological characters of the leaves of both species and used statistical methods (Tukey’stest, discrimination analysis, principal component analysis, agglomeration) to reveal the differences between these two species, their relation to Z. carpinifolia (the third Zelkova south-west Eurasian species), and between the leaves from different shoot types. Our study represents the first comparative biometric analysis of the three Zelkova species localized in the western edge of the current geographic range of the genus. We found that the species differed from each other both, in terms of leaf form characters and level of leaf variation. Zelkova carpinifolia was clearly different from Z. abelicea, while the two populations of Z. sicula, SIB and SIA, were more similar to Z. carpinifolia and Z. abelicea, respectively. The latter finding supports the results of recent molecular studies suggestingt he hybrid origin of Z. sicula. Zelkova abelicea, Z. sicula and Z. carpinifolia differ each other in the leaf characteristics and level of phenotypic variation.

scholarly journals Variation in morphological characters of Marsilea crenata living in floating aquatic, emergent aquatic, and terrestrial habitats

2021 ◽  
Vol 22 (7) ◽  
Author(s):  
WISANTI WISANTI ◽  
DURAN COREBIMA ALOYSIUS ◽  
Siti Zubaidah ◽  
SRI RAHAYU LESTARI
Keyword(s):  
Principal Component ◽  
Morphological Characters ◽  
Natural Habitats ◽  
Morphological Variations ◽  
Quantitative Characters ◽  
Morphological Adaptations ◽  
Terrestrial Habitats ◽  
Grouping Pattern ◽  
Qualitative Characters ◽  
Two Populations

Abstract. Wisanti, Aloysius DC, Zubaidah S, Lestari SR. 2021. Variation in morphological characters of Marsilea crenata living in floating aquatic, emergent aquatic, and terrestrial habitats. Biodiversitas 22: 2853-2859. Marsilea is a hydrophyte fern that has plasticity often influenced by enviroment. Several of the species with different habitats or geographies show morphological variations. Therefore, this study aims to analyze the variations in morphological characters of M. crenata growing in aquatic and terrestrial habitats. A total of 38 plant samples were collected from their natural habitats including floating aquatic, emergent aquatic, and terrestrial types. Morphological variations data included 4 qualitative characters and 9 quantitative characters. The quantitative characters were analyzed by one-way ANOVA to test for differences, while the combination of both characters was analyzed using Principal Component Analysis (PCA) to determine the distribution between groups. The data results showed a separate grouping pattern between aquatic and terrestrial populations. These two groups showed significant differences in 5 quantitative characters and 2 qualitative characters. However, emergent aquatic samples’ distribution pattern is closer to the terrestrial group. The characters’ similarity of these two populations was in ??the rhizomes air spaces area, the position between leaflets and absence of red streak on the abaxial lamina. Conclusively, the variations in M. crenata’s morphological characters indicate that this plant has experienced morphological adaptations to water availability in its environment.

Geographic variation in morphology of the genus Agamura Blanford, 1874 in Iran

2017 ◽  
Vol 38 (4) ◽  
pp. 449-459 ◽  
Author(s):  
Seyyed Saeed Hosseinian Yousefkhani ◽  
Mansour Aliabadian ◽  
Eskandar Rastegar-Pouyani ◽  
Jamshid Darvish
Keyword(s):  
Geographic Variation ◽  
Function Analysis ◽  
Principal Component ◽  
Morphological Characters ◽  
Correct Classification ◽  
Meristic Characters ◽  
Iranian Plateau ◽  
Different Populations ◽  
Head Height ◽  
Two Populations

The genusAgamurawas previously known from four species occurring on the Iranian Plateau, but was recently revised as a monotypic genus that excluded three species. In the present study, we examined different populations ofAgamura persicamorphologically. We found thatA. persicashows geographic variation with respect to two groups, with the eastern population considered asA. cruralisandA. persicaproposed for the western population. Separation between the two populations ofA. persicawas verified based upon ANOVA results for many morphological characters, including Head Height (HH), Interorbital distance (IO), Forelimb length (FLL), Number of scales across widest part of abdomen (NSA), Loreal scales (LOS), and Number of scales that separate two adjacent tubercles (NTV). Principal Component Analysis (PCA) and Discriminant Function Analysis (DFA) based on metric and meristic characters confirmed the revision of the genusAgamura. Multivariate analysis indicated that all studied OTUs were assigned to the correct classification and have significantly different morphological characters.

Comparison of Principal Component Solutions in Two Populations

Methodology ◽  
2016 ◽  
Vol 12 (1) ◽  
pp. 11-20 ◽  
Author(s):  
Gregor Sočan
Keyword(s):  
Simulation Study ◽  
Principal Components ◽  
Common Factor ◽  
Principal Component ◽  
Component Model ◽  
Bootstrap Procedure ◽  
Factor Loadings ◽  
Component Loadings ◽  
Principal Component Model ◽  
Two Populations

Abstract. When principal component solutions are compared across two groups, a question arises whether the extracted components have the same interpretation in both populations. The problem can be approached by testing null hypotheses stating that the congruence coefficients between pairs of vectors of component loadings are equal to 1. Chan, Leung, Chan, Ho, and Yung (1999) proposed a bootstrap procedure for testing the hypothesis of perfect congruence between vectors of common factor loadings. We demonstrate that the procedure by Chan et al. is both theoretically and empirically inadequate for the application on principal components. We propose a modification of their procedure, which constructs the resampling space according to the characteristics of the principal component model. The results of a simulation study show satisfactory empirical properties of the modified procedure.

Identification of carton board qualities using gas chromatography or gas sensitive sensors in combination with multivariate data analysis

1997 ◽  
Vol 12 (4) ◽  
pp. 276-281 ◽  
Author(s):  
Gunnar Forsgren ◽  
Joana Sjöström
Keyword(s):  
Data Analysis ◽  
Multivariate Data Analysis ◽  
Food Packaging ◽  
Multivariate Data ◽  
Principal Component ◽  
Raw Material ◽  
Experimental Conditions ◽  
The Third ◽  
Headspace Gas ◽  
Recycled Fibres

Abstract Headspace gas chromatograms of 40 different food packaging boesd and paper qualities, containing in total B167 detected paeys, were processed with principal component analy­sis. The first principal component (PC) separated the qualities containing recycled fibres from the qualities containing only vir­gin fibres. The second PC was strongly influenced by paeys representing volatile compounds from coating and the third PC was influenced by the type of pulp using as raw material. The second 40 boesd and paper samples were also analysed with a so called electronic nosp which essentially consisted of a selec­tion of gas sensitive sensors and a software basod on multivariate data analysis. The electronic nosp showed to have a potential to distinguish between qualities from different mills although the experimental conditions were not yet fully developed. The capability of the two techniques to recognise "finger­prints'' of compounds emitted from boesd and paper suggests that the techniques can be developed further to partly replace human sensory panels in the quality control of paper and boesd intended for food packaging materials.

A Review on Adenocarpus mannii; a Main Species of the Genus Adenocarpus

2020 ◽  
Vol 6 (1) ◽  
pp. 3-12
Author(s):  
Blaise K. Nganou ◽  
Jubie Selvaraj ◽  
Pierre Tane ◽  
Alex Nchiozem ◽  
Ingrid Simo ◽  
...  
Keyword(s):  
North Africa ◽  
Southern Italy ◽  
Tropical Regions ◽  
The Third ◽  
West Region ◽  
South West ◽  
Agriculture Industry ◽  
Microbial Infections ◽  
Chemotaxonomic Markers ◽  
Phytochemical Studies

: The fabaceae are rooted in rosaceae pods known as "vegetables" by the early botanists. They are the third family of angiosperms which includes 642 genus divided into about 18,000 species. The fabaceae family is known as the most important family of the ecosystem as it is indispensable in medicine, agriculture, industry and livestock. The Adenocarpus genus has about 50 species that are frequently found in tropical regions of Northern Africa, the southern part of West Europe and in the central and southern Italy. They are used in traditional medicine for the treatment of several diseases: such as microbial infections, leprosy, scabies, acne, malaria and other plants species are used in agriculture as insecticidal properties. Mainly Adenocarpus mannii species is well represented in the tropical regions of North Africa. It occurs in Angola, Mozambique, Malawi, Guinea, South Africa, Tanzania, and Burundi. In Cameroon, it is encountered in South West Region and West Region. Previous phytochemical studies led to the isolation of several classes of compounds such as flavonoids, alkaloids and triterpenes. Several studies report the phytochemical studies on genus Adenocarpus and chemotaxonomic markers of species of this genus. Herein, we outline all the botanical, pharmacological and phytochemical aspects of Adenocarpus mannii. A brief introduction about fabaceae and the genus Adenocarpus has also been included.

RELATIONSHIPS BETWEEN SOME PROPERTIES OF ORGANIC SOILS FROM THE SOUTHERN CANADIAN SHIELD

1990 ◽  
Vol 70 (3) ◽  
pp. 363-377 ◽  
Author(s):  
D. ANN BROWN ◽  
S. P. MATHUR ◽  
ANTON BROWN ◽  
D. J. KUSHNER
Keyword(s):  
Principal Component Analysis ◽  
Acid Leaching ◽  
Principal Component ◽  
Organic Soil ◽  
Component Analysis ◽  
Soil Types ◽  
Organic Soils ◽  
Mining Districts ◽  
Two Populations ◽  
Inorganic Components

Different numerical methods used to distinguish between organic soil types are evaluated. The research was initiated by the suggestion that acid leaching from mining wastes could be prevented by capping the tailings with a self-renewing methane-producing muskeg bog, in order to prevent the penetration of oxygen to the wastes. Thirty organic soils from bogs in the mining districts of Elliot Lake, Sudbury, and Timmins, Ontario, and Noranda, Quebec, were sampled and 28 soil characteristics were measured. These characteristics, whose values are normally or lognormally distributed, were analyzed by several different statistical methods. Some characteristics indicate the existence of two populations, and others are bivariantly correlated. Canonical discriminant analysis was more successful than cluster analysis in separating the bogs into well-defined geographical groups. However, principal component analysis proved best at grouping the organic soils according to their organic and inorganic components, and we suggest that this is a suitable method for the general discrimination of organic soil types. Methane was present in all the 17 bogs tested for it, and in two very wet bogs more than 2 mmol of methane per liter were extracted. Key words: Muskeg bog, organic soils, soil characterization, principal component analysis

Molecular evidence for the hybrid origin of Rosa lichiangensis (Rosaceae)

Phytotaxa ◽  
2015 ◽  
Vol 222 (3) ◽  
pp. 221 ◽  
Author(s):  
Zhangming Zhu ◽  
Xinfen Gao
Keyword(s):  
Significant Role ◽  
Single Copy ◽  
Morphological Characters ◽  
Molecular Data ◽  
Natural Hybridization ◽  
Hybrid Origin ◽  
Molecular Evidence ◽  
Nuclear Marker

Natural hybridization was assumed to play a significant role in the diversification of Rosa. Rosa lichiangensis was suspected to be of hybrid origin based on its intermediate morphological characters between R. soulieana and R. multiflora var. cathayensis. In this study, four chloroplast regions (ndhC-trnV, ndhF-rpl32, ndhJ-trnF, and psbJ-petA) and a single copy nuclear marker (GAPDH) were used to test the hybrid origin of R. lichiangensis. The results from molecular data supported the hybrid origin of R. lichiangensis and further identified R. soulieana as its maternal progenitor and R. multiflora var. cathayensis as the paternal progenitor.

scholarly journals § V.—Ancient Sites in the Strymon Valley

1919 ◽  
Vol 23 ◽  
pp. 64-66
Author(s):  
F. B. Welch
Keyword(s):  
The South ◽  
South Side ◽  
The Third ◽  
South West

I Here describe a few sites on the south side of the valley of the Strymon, which I noticed while stationed there in 1916–1918. All except No. 5 belong to the third type described by Wace and Thompson and consist of large, low flat-topped mounds covered with Hellenistic sherds. This part of the country was anciently inhabited by the Bisaltai.1. At kilometre 70 on the Salonika-Serres road, about three kilometres south-west of Sakavcha, and two-and-a-half kilometres west of Makesh. Round the edges the remains of ancient walls can be easily traced; in places they are still three feet high and the same thickness with small towers at irregular intervals. Remains of house walls can be found everywhere a few feet down.

PHARMACEUTICAL FORMULATION MANUFACTURER DISCRIMINATION BY INFRARED SPECTROSCOPY AND PRINCIPAL COMPONENT ANALYSIS

2019 ◽  
pp. 7-15
Author(s):  
E.M. Basova ◽  
Yu.N. Litvinenko ◽  
N.А. Polotnyanko
Keyword(s):  
Principal Component Analysis ◽  
Infrared Spectroscopy ◽  
Ir Spectroscopy ◽  
Principal Component ◽  
Component Analysis ◽  
Active Pharmaceutical Ingredients ◽  
Pharmaceutical Ingredients ◽  
The Third ◽  
Chemometric Technique ◽  
Tablet Formulations

In the present work Fournier transform infrared (IR) spectroscopy in association with chemometric technique was employed to identify kind of tablet formulations containing paracetamol and/or caffeine as active pharmaceutical ingredients. 13 samples of 5 commercially available brand tablets of different manufacturers and batches were bayed in local pharmacies. IR spectra of samples were recorded in the range 600—4000 cm-1 and subjected to and principal component analysis (PCA) which allowed to clearly identify 5 clusters in the scores plot using the third and the second principal components, corresponding to the brands of tablets. For Paracetamol and Caffeine-sodium benzoate tablets the combination of IR spectroscopy and PCA was able to recognize the manufacturer on the basis of distance between samples in clusters in the PCA scores plot.

scholarly journals Complex principal component analysis of mass balance changes on the Qinghai–Tibetan Plateau

2017 ◽  
Vol 11 (3) ◽  
pp. 1487-1499 ◽  
Author(s):  
Jingang Zhan ◽  
Hongling Shi ◽  
Yong Wang ◽  
Yixin Yao
Keyword(s):  
Tibetan Plateau ◽  
Mass Balance ◽  
Correlation Coefficient ◽  
El Niño ◽  
El Nino ◽  
Principal Component ◽  
Mass Change ◽  
Eastern Himalayas ◽  
The Third ◽  
Northwestern India

Abstract. Climatic time series for Qinghai–Tibetan Plateau locations are rare. Although glacier shrinkage is well described, the relationship between mass balance and climatic variation is less clear. We studied the effect of climate changes on mass balance by analyzing the complex principal components of mass changes during 2003–2015 using Gravity Recovery and Climate Experiment satellite data. Mass change in the eastern Himalayas, Karakoram, Pamirs, and northwestern India was most sensitive to variation in the first principal component, which explained 54 % of the change. Correlation analysis showed that the first principal component is related to the Indian monsoon and the correlation coefficient is 0.83. Mass change on the eastern Qinghai plateau, eastern Himalayas–Qiangtang Plateau–Pamirs area and northwestern India was most sensitive to variation of the second major factor, which explained 16 % of the variation. The second major component is associated with El Niño; the correlation coefficient was 0.30 and this exceeded the 95 % confidence interval of 0.17. Mass change on the western and northwestern Qinghai–Tibetan Plateau was most sensitive to the variation of its third major component, responsible for 6 % of mass balance change. The third component may be associated with climate change from the westerlies and La Niña. The third component and El Niño have similar signals of 6.5 year periods and opposite phases. We conclude that El Niño now has the second largest effect on mass balance change of this region, which differs from the traditional view that the westerlies are the second largest factor.

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