This is in contrast to the complex regulation known for glucosinolate content which includes herbivore, pathogen, biotic and abiotic stress responses [5] [7].
The species sampled therefore represent a range of trophic groups expected to have widely different diets, including herbivores, planktivores (e.g. zooplankton), carnivores (e.g. benthic invertebrates and other fishes), and detritivores.
However, all mammals are susceptible, including herbivores such as horses, cattle, and antelope (5 – 7 ).
This functional pattern was first demonstrated by Every [ 8] more than 50 years ago in many different species including herbivores, carnivores, primates and humans.
Masticatory efficiency is strongly related to tooth anatomy and wear characteristics as highlighted in comparative studies of dentitions of many different species including herbivores, carnivores, primates and humans.
Additional work explicitly manipulating rhizobial symbionts and antagonists, including herbivores and pathogens, will be required to determine whether these partners play a role in adaptation to salinity in M. trunactula.
Influence of other organisms, including herbivores and microorganisms, in bark beetle populations can be defined as those that predispose the tree to bark beetle attack [other herbivores; (Erbilgin and Raffa 2002)], and those that regulate bark beetle populations [predators; (Reeve 1997)].
CDPKs are typically a large family, involved in a variety of roles specific to higher plants, including herbivore defence [ 90] and abscisic acid signalling [ 91– 91].
Several other defense-related genes are also positively regulated in resistant plants, including herbivore-response related genes glutathione-S-transferase and cysteine proteinase inhibitor.
However, the adaptive value of gall chemicals remains uncertain [ 16] and we are unaware of any study that has experimentally confirmed the role of gall secondary metabolites in reducing mortality by natural enemies, which includes vertebrate herbivores although not explicitly mentioned.
