scholarly journals Sequestration of plant pyrrolizidine alkaloids by chrysomelid beetles and selective transfer into the defensive secretions

Chemoecology ◽  
1991 ◽  
Vol 2 (1) ◽  
pp. 41-48 ◽  
Author(s):  
Martine Rowell-Rahier ◽  
Ludger Witte ◽  
Adelheid Ehmke ◽  
Thomas Hartmann ◽  
Jacques M. Pasteels
Keyword(s):  
Pyrrolizidine Alkaloids ◽  
Selective Transfer ◽  
Defensive Secretions ◽  
Chrysomelid Beetles

Pyrrolizidine alkaloids and pentacyclic triterpene saponins in the defensive secretions of Platyphora leaf beetles

Chemoecology ◽  
2001 ◽  
Vol 11 (3) ◽  
pp. 113-120 ◽  
Author(s):  
Jacques M. Pasteels ◽  
Arnaud Termonia ◽  
Donald M. Windsor ◽  
Ludger Witte ◽  
Claudine Theuring ◽  
...  
Keyword(s):  
Pyrrolizidine Alkaloids ◽  
Triterpene Saponins ◽  
Defensive Secretions ◽  
Pentacyclic Triterpene ◽  
Leaf Beetles

scholarly journals Sequestration of ingested [14C]senecionineN-oxide in the exocrine defensive secretions of chrysomelid beetles

1991 ◽  
Vol 17 (12) ◽  
pp. 2367-2379 ◽  
Author(s):  
Adelheid Ehmke ◽  
Martine Rowell-Rahier ◽  
Jacques M. Pasteels ◽  
Thomas Hartmann
Keyword(s):  
Defensive Secretions ◽  
Chrysomelid Beetles

Investigation of Metabolism-Mediated Toxicity of Pyrrolizidine Alkaloids from Comfrey

Planta Medica ◽  
2011 ◽  
Vol 77 (05) ◽  
Author(s):  
H Tamta ◽  
RS Pawar ◽  
WG Wamer ◽  
E Grundel ◽  
AJ Krynitsky ◽  
...  
Keyword(s):  
Pyrrolizidine Alkaloids

Herbicides compromise biological control of ragwort

2002 ◽  
pp. 147-152
Author(s):  
K. Betteridge ◽  
D. Costall
Keyword(s):  
Biological Control ◽  
Pyrrolizidine Alkaloids ◽  
Animal Health ◽  
Flea Beetle ◽  
Dairy Farm ◽  
Senecio Jacobaea ◽  
Longitarsus Jacobaeae ◽  
High Ester ◽  
Low Levels

In spite of ragwort flea beetle (RFB) being present on a Dannevirke dairy farm, pastures were sprayed each winter to reduce ragwort density and limit the risk of ragwort poisoning of stock. The trial on this farm from June 1999 - October 2001, aimed to determine whether herbicide (H) impacted on RFB and how H and RFB each impacted on ragwort growth and persistence. RFBfree areas were created by spraying with insecticide (I). Effects of ragwort on animal health are also reported. High ester 2,4-D (H) boom-sprayed once only, in June 1999, killed most ragwort plants and reduced RFB larvae densities to low levels before the plants died. Once new ragwort established in treatment H, the plants became infested with RFB larvae. RFB larvae were suppressed by I resulting in ragwort density declining more slowly than in treatments where RFB were not suppressed. Insecticide treatments were stopped after 15 months and, at 24 months, ragwort could not be found within the trial area. Ragwort control was attributed to the cessation of herbicide spraying allowing the RFB population to reach a sufficient density to kill both small and large ragwort plants. Sub-clinical ragwort poisoning was found in livers of culled cows that had grazed on ragwort-dense pastures. Keywords: animal health, biological control, Longitarsus jacobaeae, pyrrolizidine alkaloids, ragwort, ragwort flea beetle, Senecio jacobaea

The Toxicity Effect of Echium Amoenum on the Liver and Kidney of Mice.

2020 ◽  
Vol 17 ◽  
Author(s):  
Mozhgan Ghorbani ◽  
Atefeh Araghi ◽  
Nabi Shariatifar ◽  
Seyed Hooman Mirbaha ◽  
Behrokh Marzban Abbasabadi ◽  
...  
Keyword(s):  
Pyrrolizidine Alkaloids ◽  
Biochemical Analysis ◽  
Liver Enzymes ◽  
Copper Ion ◽  
Control Group ◽  
Dependent Manner ◽  
Toxicity Effect ◽  
Significant Difference ◽  
Liver And Kidney ◽  
Echium Amoenum

Aims: The aim of this study was to investigate the toxic effect of Echium amoenum plants on the liver and kidney of animal model. Background: Echium amoenum is one of the medicinal plants containing pyrrolizidine alkaloids with several properties which has widely consumed among different communities. Objective: The toxic effects of Echium amoenum on the liver and kidney were investigated in this study. Methods: Sixty mice were kept for 28 days under the appropriate laboratory conditions. Echium amoenum extract (25, 12.5, 50 mg / kg, ip.) was administered for 28 days. At the end of experiment, blood samples were drawn and liver and kidneys were removed for evaluating hepatotoxicity and nephrotoxicity of extract. Additionally, experiments were conducted to assay the enzymatic and oxidative activities. Results: There was no significant difference in the levels of copper ion in the liver and kidneys among all groups. There was a significant difference in the levels of lipid peroxidation in the liver of treated groups versus control group. The significant difference was not observed in the levels of glutathione of the liver of all groups. However, the levels of glutathione of the kidney significantly decreased in the treated groups versus control group. There was no significant difference in the liver enzymes including ALP, SGOT, and SGPT between all groups. This indicates that damage increase with enhancing the time and concentrations of extract. Biochemical analysis showed the creatinine and urea levels did not change in the treated groups versus control group. Conclusion: According to the present findings, it is suggested that Echium amoenum causes hepatotoxicity and nephrotoxicity effects in dose and time dependent manner.

Pyrrolizidine alkaloids. XVI. Alkaloids from some plants of the genus Ligularia

1971 ◽  
Vol 36 (6) ◽  
pp. 2205-2215 ◽  
Author(s):  
A. Klásek ◽  
P. Sedmera ◽  
F. Šantavý
Keyword(s):  
Pyrrolizidine Alkaloids
Sign in / Sign up

Export Citation Format

Share Document