Indirect Defense Responses to Herbivory in Grasses

The Role of Root-Produced Volatile Secondary Metabolites in Mediating Soil Interactions

“…Here, we will focus our attention to the role of plant VOCs exudation and their effect on various soil organisms including other plants, microorganisms, herbivores and particularly predators of the herbivore. Particularly, volatile terpene production, physiology, emission, and effect on other organisms has been the concern of incredible work on aboveground interactions (Pichersky, Noel, and Dudareva 2006), and a recent trend in research has highlighting their role in belowground interactions and physiology (Degenhardt 2009;Degenhardt et al 2009;Kollner et al 2008). The evolution, detection, and manipulation of such compounds will finally be discussed as a potential tool for biotechnological improvement of resistance against agricultural root feeding pests (Turlings and Ton 2006).…”

Discovery, Biosynthesis and Stress-Related Accumulation of Dolabradiene-Derived Defenses in Maize

“…Plants typically harbor both a widely conserved subset of diterpenoids such as the GAs, a class of phytohormones mediating developmental processes, and myriad specialized compounds with diverse roles in chemical ecology and plant adaptation (Keeling and Bohlmann, 2006;Gershenzon and Dudareva, 2007;Chaturvedi et al, 2012;Schmelz et al, 2014;Hedden and Sponsel, 2015). Because of their agronomic importance as two of the world's major food crops, maize (Zea mays) and rice (Oryza sativa) have been studied extensively for their terpenoid-based defense systems (Degenhardt, 2009;Schmelz et al, 2014). In rice, a suite of momilactone, oryzalexin, and phytocassane diterpenoids confer defense against several major pathogens, such as rice blast (Magnaporthe oryzae; Peters, 2006;Kato-Noguchi and Kobayashi, 2009;Toyomasu et al, 2014).…”

Exotic Plant Invasion in the Context of Plant Defense against Herbivores

“…Some terpenes such as EbC are present in high amounts in the native populations of A. adenophora compared to invasive populations (Inderjit et al, 2011b), which is reported to be involved in herbivore-induced plant defense (Rasmann et al, 2005;Degenhardt, 2009). Hiltpold et al (2011) reported that higher production of EbC in Zea mays roots upon herbivore attack by Diabrotica virgifera virgifera could be due to herbivoretriggered increase in the transcriptional activity of EbC synthase gene tps23.…”