scholarly journals Plant Tannins and Essential Oils Have an Additive Deterrent Effect on Diet Choice by Kangaroos

Forests ◽  
2021 ◽  
Vol 12 (12) ◽  
pp. 1639
Author(s):  
Christine Rafferty ◽  
Byron B. Lamont
Keyword(s):  
Secondary Metabolites ◽  
Essential Oils ◽  
Relative Effectiveness ◽  
Deterrent Effect ◽  
Feeding Time ◽  
Pine Oil ◽  
Grey Kangaroo ◽  
Western Grey Kangaroo ◽  
Australian Flora ◽  
Time Spent Feeding

Tannins and essential oils are well recognised as antiherbivore compounds. We investigated the relative effectiveness of the polyphenol, tannin, and the essential oils, 1,8-cineole and pine oil, as feeding deterrents against western grey kangaroos. Both groups of secondary metabolites are naturally abundant in many Australian plants. These three metabolite groups were incorporated separately or together into standard pellets for presentation to kangaroos, and their behaviour (sequence of food choice and feeding time) and amounts consumed were observed. The control (with no secondary metabolites) was much preferred. There was a sharp reduction in the ingestion of pellets containing tannins, 1,8-cineole or pine oil. Combinations of the metabolites resulted in almost no consumption. In association with tannin, pellets containing either 1,8-cineole or pine oil were as effective deterrents as both combined. There was a strong correlation between time spent feeding on the different diets and the amount of food consumed, although the rate of intake was markedly slower when secondary metabolites were present. Behavioural observations showed that the amount of food ingested is initially guided by the presence/absence of essential oils, apparently detected by smell, and later by the presence/absence of tannins, by taste. Both groups of secondary metabolites work in concert by stimulating different senses that minimise herbivory by marsupials, such as the western grey kangaroo, and help to explain their abundance in the Australian flora.

scholarly journals Antimicrobial Activities in Pistacia atlantica—Aphids Make a Difference!

Proceedings ◽  
2020 ◽  
Vol 66 (1) ◽  
pp. 9
Author(s):  
Yoram Gerchman
Keyword(s):  
Secondary Metabolites ◽  
Essential Oils ◽  
Organic Solvents ◽  
Antimicrobial Properties ◽  
Antimicrobial Activities ◽  
Disk Diffusion ◽  
Pistacia Atlantica ◽  
Disk Diffusion Assay ◽  
Bacteria And Fungi ◽  
Diffusion Assay

Plants have been explored and used as sources for antimicrobial extract and compounds for many years, but galls—specialized structures forms on such by diversity of organisms—have been explored much less. Aphid galls host many insects in closed, humid and sugar rich environments for long periods. We have tested the antimicrobial properties of Slavum wertheimae aphid galls on Pistacia atlantica. Secondary metabolites were extracted from leaves and galls with organic solvents, and essential oils with Clevenger, and tested by disk diffusion assay and volatile effect on bacteria and fungi, respectively. The results demonstrated that gall extracts/essential oils had much stronger activity against the diversity of bacteria and fungi. The large diversity of galls suggest they could be explored as source for novel compounds.

scholarly journals Pharmacology and Phytochemistry of Ecuadorian Medicinal Plants: An Update and Perspectives

2021 ◽  
Vol 14 (11) ◽  
pp. 1145
Author(s):  
Chabaco Armijos ◽  
Jorge Ramírez ◽  
Melissa Salinas ◽  
Giovanni Vidari ◽  
Alírica I. Suárez
Keyword(s):  
Chemical Composition ◽  
Medicinal Plants ◽  
Secondary Metabolites ◽  
Essential Oils ◽  
Volatile Compounds ◽  
Biological Activities ◽  
Indigenous Communities ◽  
Therapeutic Agents ◽  
Practical Applications ◽  
Pharmacological Studies

The use of plants as therapeutic agents is part of the traditional medicine that is practiced by many indigenous communities in Ecuador. The aim of this study was to update a review published in 2016 by including the studies that were carried out in the period 2016–July 2021 on about 120 Ecuadorian medicinal plants. Relevant data on raw extracts and isolated secondary metabolites were retrieved from different databases, resulting in 104 references. They included phytochemical and pharmacological studies on several non-volatile compounds, as well as the chemical composition of essential oils (EOs). The tested biological activities are also reported. The potential of Ecuadorian plants as sources of products for practical applications in different fields, as well the perspectives of future investigations, are discussed in the last part of the review.

scholarly journals Volatilome and Essential Oil of Ulomoides dermestoides: A Broad-Spectrum Medical Insect

Molecules ◽  
2021 ◽  
Vol 26 (20) ◽  
pp. 6311
Author(s):  
Paulina J. Cázares-Samaniego ◽  
Claudia G. Castillo ◽  
Miguel A. Ramos-López ◽  
Marco M. González-Chávez
Keyword(s):  
Secondary Metabolites ◽  
Essential Oil ◽  
Essential Oils ◽  
Traditional Medicine ◽  
Broad Spectrum ◽  
Alternative Treatment ◽  
Aromatic Compounds ◽  
Therapeutic Potential ◽  
Pharmacological Interest ◽  
Main Components

Ulomoides dermestoides are used as a broad-spectrum medical insect in the alternative treatment of various diseases. Preliminary volatilome studies carried out to date have shown, as the main components, methyl-1,4-benzoquinone, ethyl-1,4-benzoquinone, 1-tridecene, 1-pentadecene, and limonene. This work focused on the production of metabolites and their metabolic variations in U. dermestoides under stress conditions to provide additional valuable information to help better understand the broad-spectrum medical uses. To this end, VOCs were characterized by HS-SPME with PEG and CAR/PDMS fibers, and the first reported insect essential oils were obtained. In HS-SMPE, we found 17 terpenes, six quinones, five alkenes, and four aromatic compounds; in the essential oils, 53 terpenes, 54 carboxylic acids and derivatives, three alkynes, 12 alkenes (1-Pentadecene, EOT1: 77.6% and EOT2: 57.9%), 28 alkanes, nine alkyl disulfides, three aromatic compounds, 19 alcohols, three quinones, and 12 aldehydes were identified. Between both study approaches, a total of 171 secondary metabolites were identified with no previous report for U. dermestoides. A considerable number of the identified metabolites showed previous studies of the activity of pharmacological interest. Therefore, considering the wide variety of activities reported for these metabolites, this work allows a broader vision of the therapeutic potential of U. dermestoides in traditional medicine.

scholarly journals Characterization of secondary metabolites of leaf and stem essential oils of Achillea fragrantissima from central region of Saudi Arabia

2020 ◽  
Vol 13 (5) ◽  
pp. 5254-5261 ◽  
Author(s):  
Merajuddin Khan ◽  
Mujeeb Khan ◽  
Mahmood M.S. Abdullah ◽  
Lamya H. Al-Wahaibi ◽  
Hamad Z. Alkhathlan
Keyword(s):  
Saudi Arabia ◽  
Secondary Metabolites ◽  
Essential Oils ◽  
Central Region ◽  
Achillea Fragrantissima

The measurement of luteinising hormone in the western grey kangaroo (Macropus fuliginosus ocydromus) and the black-flanked rock wallaby (Petrogale lateralis lateralis)

2009 ◽  
Vol 31 (1) ◽  
pp. 61 ◽  
Author(s):  
Phillip Matson ◽  
Christopher Mayberry ◽  
Nicole Willers ◽  
Margaret A. Blackberry ◽  
Graeme B. Martin
Keyword(s):  
Enzyme Immunoassay ◽  
Luteinising Hormone ◽  
Standard Curve ◽  
Grey Kangaroo ◽  
Western Grey Kangaroo

An enzyme immunoassay with an anti-bovine-LH antibody (518B7) was applied to female western grey kanagaroos (Macropus fuliginosus ocydromus) and black-flanked rock wallabies (Petrogale lateralis lateralis). Validation showed parallelism to the assay standard curve, and significant increases in plasma LH concentrations after challenging animals with intramuscular GnRH.

The Expression of Distinctive Secondary Metabolites by Different Eucalyptus spp

1992 ◽  
Vol 45 (11) ◽  
pp. 1919
Author(s):  
RM Carman
Keyword(s):  
Secondary Metabolites ◽  
Essential Oils ◽  
Secondary Metabolite ◽  
Eucalyptus Species ◽  
Metabolite Level

A survey of the essential oils of various Eucalyptus species shows that there are sufficient compounds present to support the expectation that differences between species will be expressed or accompanied at the secondary metabolite level by different chemicals, rather than by a different mix of similar chemicals.

276. The technical and biological validation of an LH assay for use with the Western Grey Kangaroo (Macropus fuliginosis) and Black-flanked Rock Wallaby (Petrogale lateralis lateralis)

2008 ◽  
Vol 20 (9) ◽  
pp. 76
Author(s):  
P. Matson ◽  
C. Mayberry ◽  
N. Willers ◽  
M. A. Blackberry ◽  
G. B. Martin
Keyword(s):  
Plasma Concentrations ◽  
Standard Curve ◽  
Biological Validation ◽  
Grey Kangaroo ◽  
Coefficients Of Variation ◽  
Western Grey Kangaroo ◽  
Technical Validation ◽  
Zoo Biology ◽  
Smithsonian Institute ◽  
And Control

Methods for the measurement of marsupial LH invariably rely upon the similarity of the LH molecule between different species and usually use anti-ovine or anti-bovine LH antibody and an ovine or bovine labelled LH preparation. Initial attempts to measure plasma LH in the Western Grey Kangaroo with assays using antibodies to 4 different isoforms of ovine LH raised in 7 different rabbits were unsuccessful. An enzymeimmunoassay (EIA) developed for the Asian elephant (Zoo Biology 23:45–63) was then applied to the Western Grey Kangaroo and the Black-flanked Rock Wallaby. This EIA has an anti-bovine-LH monoclonal antibody (518B7 provided by Dr Jan Roser, University of California, Davis, USA), biotinylated ovine LH label and bovine LH standard (NIADDK-oLH-26 and NIH-bLH-B10, both provided by Dr Janine Brown and Nicole Abbondanza, Smithsonian Institute, Front Royal, Virginia USA). Technical validation showed that serial dilution down to 1:8 of plasma from 7 individuals of each species showed parallelism to the assay standard curve, and control samples (1.24–5.30 ng/mL) had between-assay coefficients of variation <9%. Biological validation was achieved by challenging animals with intramuscular GnRH (Fertagyl®, 2.5 µg/kg) and measuring LH before and 25 min after the injection. Significant increases in plasma concentrations of LH (mean ± sem; all P > 0.0005) were seen after GnRH for both the Western Grey Kangaroo (from 5.0 ± 0.8 ng/mL to 9.4 ± 1.2 ng/mL; n = 19) and the Black-flanked Rock Wallaby (from 6.0 ± 0.7 ng/mL to 10.6 ± 0.6 ng/mL; n = 28). In conclusion, this assay can be successfully used to measure LH in these two species.

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