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Physical versus chemical defence mechanisms in toxic Gastrolobium
Oecologia, 1996The degree to which physical defence mechanisms are present in toxic species of Gastrolobium was compared with the known fluoroacetate (the toxic principle) concentrations of these plants using both histological leaf sections prepared from fresh leaves (4 species), and a variety of visual external traits measured from herbarium specimens (28 species ...
L E, Twigg, L V, Socha
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Experimental evidence of chemical defence mechanisms in Antarctic bryozoans
Marine Environmental Research, 2017Bryozoans are among the most abundant and diverse members of the Antarctic benthos, however the role of bioactive metabolites in ecological interactions has been scarcely studied. To extend our knowledge about the chemical ecology of Antarctic bryozoans, crude ether extracts (EE) and butanol extracts (BE) obtained from two Antarctic common species ...
Blanca Figuerola +7 more
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Identification of Chaoborus kairomone chemicals that induce defences in Daphnia
Nature Chemical Biology, 2018Infochemicals play important roles in aquatic ecosystems. They even modify food web interactions, such as by inducing defenses in prey. In one classic but still not fully understood example, the planktonic freshwater crustacean Daphnia pulex forms specific morphological defenses (neckteeth) induced by chemical cues (kairomones) released from its ...
Linda C. Weiss +11 more
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Ontogenetic and temporal trajectories of chemical defence in a cyanogenic eucalypt
Oecologia, 2007Many studies have shown that similarly aged plants within a species or population can vary markedly in the concentration of defence compounds they deploy to protect themselves from herbivores. Some studies have also shown that the concentration of these compounds can change with development, but no empirical research has mapped such an ontogenetic ...
Jason Q D, Goodger +2 more
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Chemical Manipulation of Antioxidant Defences in Plants
2005ABSTRACT Synthetic xenobiotics such as herbicides elicit the generation of reactive oxygen intermediates (ROIs) in plants, which induce antioxidant defences, notably the production of glutathione (GSH) and glutathione transferases (GSTs). GSTs also play an important role in catalysing the conjugation of xenobiotics with GSH, which leads to their ...
Robert Edwards +3 more
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Induced chemical defences in Colophospermum mopane trees
African Journal of Range & Forage Science, 2007A field experiment was conducted in which Mopane (Colophospermum mopane) trees were subjected to three different canopy treatments:felling of trees at a mean height of 0.7m above ground level, felling at a height of 2m, or pruning of selected branches.
Wessels, D.C.J. +2 more
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Local and General Defence Mechanisms in Bacterial and Chemical Peritonitis
1988The inflammatory reaction in peritonitis often leads to profound systemic changes, indeed peritonitis accounts for half of all cases of fatal septic shock (1). Although there are numerous causes of peritonitis, the clinical picture is almost the same in most peritonitis patients.
A, Lasson, M, Delshammar, K, Ohlsson
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Chemical defence of adult leaf beetles
1994info:eu-repo/semantics ...
Pasteels, Jacques +3 more
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