| selective transport systems mediate sequestration of plant glucosides in leaf beetles: a molecular basis for adaptation and evolution. | chrysomeline larvae respond to disturbance and attack by everting dorsal glandular reservoirs, which release defensive secretions. the ancestral defense is based on the de novo synthesis of monoterpene iridoids. the catabolization of the host-plant o-glucoside salicin into salicylaldehyde is a character state that evolved later in two distinct lineages, which specialized on salicaceae. by using two species producing monoterpenes (hydrothassa marginella and phratora laticollis) and two sequesteri ... | 2004 | 15365181 |
| volatile-mediated within-plant signaling in hybrid aspen: required for systemic responses. | plant volatiles play crucial roles in signaling between plants and their associated community members, but their role in within-plant signaling remains largely unexplored, particularly under field conditions. using a system comprising the hybrid aspen (populus tremula x tremuloides) and the specialized herbivorous leaf beetle (phratora laticollis) and, combining field, greenhouse and laboratory experiments, we examined whether local damage triggered systemic responses in undamaged branches that ... | 2017 | 28280959 |
| de novo biosynthesis versus sequestration: a network of transport systems supports in iridoid producing leaf beetle larvae both modes of defense. | in the larval chrysomelines the de novo synthesis of monoterpenoids (iridoids) is believed to represent the ancestral state in the evolution of chemical defenses. here we demonstrate that the iridoid producing larvae of plagiodera versicolora and phratora laticollis have the potential to sequester precursors from food. in nature, iridoids may even have a dual origin, namely plant-derived and de novo produced. the ability to sequester plant-derived precursors was proved by (i) (13)c-labelling of ... | 2008 | 18687400 |