Comparative study on epicuticular leaf waxes of Araucaria araucana, Agathis robusta and Wollemia nobilis (Araucariaceae)

2008 ◽  
Vol 56 (8) ◽  
pp. 644 ◽  
Author(s):  
Simona Dragota ◽  
Markus Riederer
Keyword(s):  
Chemical Composition ◽  
Comparative Study ◽  
Chemical Compositions ◽  
Cuticular Waxes ◽  
Leaf Waxes ◽  
Leaf Surfaces ◽  
Epicuticular Wax Crystals ◽  
Araucaria Araucana ◽  
Main Components ◽  
Wax Crystals

The present study describes fine structure and chemical composition of the epicuticular leaf waxes of three Araucariaceae species. The leaf surfaces of samples from greenhouse-grown juvenile trees of Araucaria araucana K.Koch and Agathis robusta F.Muell. were investigated by scanning electron microscopy (SEM) and compared with data for a young greenhouse-grown Wollemia nobilis W.G.Jones, K.D.Hill & J.M.Allen cutting characterised earlier. The chemical compositions of the epicuticular waxes selectively removed from the adaxial and abaxial leaf surfaces of A. araucana, A. robusta and W. nobilis were studied by gas chromatography combined with mass spectroscopy (GC–MS). The main components of the leaf cuticular waxes of A. araucana, A. robusta and W. nobilis are members of the following three major compound classes: n-alkanes, secondary alcohols and alkane diols. It was shown earlier that the latter two classes contribute to the formation of the tubular epicuticular-wax crystals on the leaf surfaces. The present comparative study also revealed differences in the crystalline microstructure and chemical composition of the epicuticular leaf waxes among the three species.

Surface Structure and Chemical Composition of Leaf Waxes from Quercus robur L., Acer pseudoplatanus L. and Jug Ians regia L

1990 ◽  
Vol 45 (7-8) ◽  
pp. 813-817 ◽  
Author(s):  
R. B. N. Prasad ◽  
Paul-Gerhard Gülz
Keyword(s):  
Chemical Composition ◽  
Surface Structure ◽  
Quercus Robur ◽  
Juglans Regia ◽  
Surface Structures ◽  
Chemical Compositions ◽  
Acer Pseudoplatanus ◽  
Lower Side ◽  
Leaf Surfaces ◽  
Walnut Leaves

Abstract The leaves of three deciduous broadleaf trees namely Quercus rohur L. (oak), Acer pseudo- platanus L. (maple) and Juglans regia L. (walnut) have different wax surface structures with different chemical compositions. On both the upper and lower side of the oak leaf, crystalloid platelets with sharp fringed edges were observed. Maple and walnut leaf surfaces showed quite different crystalloid arrangements on the upper and the lower side of the leaves. On the lower side of the maple leaf crystalloid platelets in form of lumps were found, whereas the upper side showed no crystalloids. Walnut leaves exhibited dense platelets with rounded edges on the upper side but not on the lower side.

scholarly journals Plant Epicuticular Waxes: Chemistry, Form, Self-Assembly and Function

2006 ◽  
Vol 1 (11) ◽  
pp. 1934578X0600101 ◽  
Author(s):  
Kerstin Koch ◽  
Wilhelm Barthlott
Keyword(s):  
Chemical Composition ◽  
Self Assembly ◽  
Three Dimensional ◽  
Plant Secondary Metabolites ◽  
Land Plants ◽  
Epicuticular Waxes ◽  
65Th Birthday ◽  
Epicuticular Wax Crystals ◽  
And Function ◽  
Wax Crystals

Plant epicuticular waxes represent the outermost boundary layer of the majority of land plants. Based on their micromorphology and chemical composition they form a multifunctional surface. Their most important functions are the protection against uncontrolled water loss, reflection of solar radiation from UV to visible light, and their crucial influence on surface wettability and particle adhesion. The three-dimensional epicuticular wax crystals are of particular importance for the majority of these interfacial interactions. This article provides an overview on plant epicuticular waxes, focusing on chemical composition, morphology, self-assembly and function. It is dedicated to Prof. Dr. Eckhard Wollenweber on the occasion of his 65th birthday, and his continuous and fundamental work on a special class of plant secondary metabolites that are collectively called flavonoids.

scholarly journals Chemical Composition of the Essential Oil of the Local Endemics Centaurea davidovii and C. parilica (Asteraceae, sect. Lepteranthus) from Bulgaria

2014 ◽  
Vol 9 (9) ◽  
pp. 1934578X1400900
Author(s):  
Antonella Maggio ◽  
Luana Riccobono ◽  
Svetlana Bancheva ◽  
Maurizio Bruno ◽  
Felice Senatore
Keyword(s):  
Chemical Composition ◽  
Essential Oil ◽  
Essential Oils ◽  
Octadecadienoic Acid ◽  
Chemical Compositions ◽  
Caryophyllene Oxide ◽  
Pca Analysis ◽  
Hexadecanoic Acid ◽  
Aerial Parts ◽  
Main Components

In the present study the chemical compositions of the essential oils from aerial parts of Centaurea davidovii Urum. and C. parilica Stoj. & Stef., both endemic to Bulgaria, were evaluated by GC and GC-MS. The main components of C. davidovii were β-eudesmol (13.9%), spathulenol (13.3%), caryophyllene oxide (10.1%) and ( Z)-phytol (5.4%). The main components of C parilica were hexadecanoic acid (39.2%), ( Z, Z)-9,12-octadecadienoic acid (11.9%), caryophyllene oxide (6.8%) and spathulenol (6.6%). In order to compare the essential oils composition of these taxa and of related species a PCA analysis was carried out.

scholarly journals Comparative Study of the Chemical Composition of Essential Oils of Five Tagetes Species Collected in Venezuela

2012 ◽  
Vol 7 (9) ◽  
pp. 1934578X1200700
Author(s):  
Kaylin Armas ◽  
Janne Rojas ◽  
Luis Rojas ◽  
Antonio Morales
Keyword(s):  
Chemical Composition ◽  
Essential Oil ◽  
Comparative Study ◽  
Essential Oils ◽  
Main Components

The leaves and inflorescences of five species of Tagetes, family Asteraceae, were collected from different locations in Mérida state, Venezuela, and their essential oils analyzed by GC and GC/MS. Several differences were observed in the composition of these oils, mainly regarding the major components, which for T. caracasana were trans-ocimenone (64.3%) and cis-tagetone (13.7%), and for T. erecta, piperitone (35.9%) and terpinolene (22.2%). High amounts of trans-anethole (87.5%) and estragole (10.7%) were observed in T. filifolia, while T. subulata essential oil contained terpinolene (26.0%), piperitenone (13.1%) and limonene (10.8%). For T. patula, two different oil samples were analyzed, leaves (TPL) and inflorescences (TPI). The TPL oil showed terpinolene (20.9%) and piperitenone (14.0%) as main components, while the TPI sample was composed mainly of β-caryophyllene (23.7%), terpinolene (15.6%) and cis-β-ocimene (15.5%).

Chemical composition of epicuticular wax crystals on the slippery zone in pitchers of five Nepenthes species and hybrids

Planta ◽  
2006 ◽  
Vol 225 (6) ◽  
pp. 1517-1534 ◽  
Author(s):  
Michael Riedel ◽  
Anna Eichner ◽  
Harald Meimberg ◽  
Reinhard Jetter
Keyword(s):  
Chemical Composition ◽  
Epicuticular Wax ◽  
Epicuticular Wax Crystals ◽  
Wax Crystals

scholarly journals A Double-Edged Sword of Surfactant Effect on Hydrophobic Surface Broccoli Leaf as a Model Plant: Promotion of Pathogenic Microbial Contamination and Improvement to Disinfection Efficiency of Ozonated Water

Processes ◽  
2021 ◽  
Vol 9 (4) ◽  
pp. 679
Author(s):  
Hyun Jong Song ◽  
Min Hwan Kim ◽  
Kang-Mo Ku
Keyword(s):  
Microbial Contamination ◽  
Antibacterial Effect ◽  
Hydrophobic Surface ◽  
Food Crops ◽  
Washing Process ◽  
Colony Forming Units ◽  
Leaf Surfaces ◽  
Epicuticular Wax Crystals ◽  
Wax Crystals ◽  
Ozonated Water

Pathogenic microbial contamination is significantly influenced by the crop surface properties and surfactant use, which are crucial factors for the postharvest washing process. However, there is little information on the interaction between surfactant and food pathogens on food crops. Thus, this study (1) investigated whether the attachment of Salmonella increases as pesticides denature epicuticular wax crystals and (2) tested if the antibacterial effect of ozonated water can be improved on waxy produce surfaces by adding surfactant to ozonated water. As a result, significantly lower levels of Salmonella Typhimurium attached to waxy leaf surfaces than they did to glossy and pesticide-treated waxy leaf surfaces (3.28 as opposed to 4.10 and 4.32 Log colony forming units (CFU)/cm2, respectively), suggesting that the pesticide containing a surfactant application increased the attachment of S. Typhiumurium on waxy leaf surfaces. There was no significant washing effect on waxy leaf surfaces washed with ozonated water. On the other hand, S. Typhimurium were not detected on waxy leaf surfaces after washing with surfactant-added ozonated water.

Chromatographic fractionation and analysis of the main components of eggplant (Solanum melongenaL.) leaf cuticular waxes

2009 ◽  
Vol 21 (1) ◽  
pp. 127-137 ◽  
Author(s):  
Ł. P. Haliński ◽  
J. Szafranek ◽  
B. M. Szafranek ◽  
M. Gołębiowski ◽  
P. Stepnowski
Keyword(s):  
Cuticular Waxes ◽  
Chromatographic Fractionation ◽  
Main Components
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