Effects of Bactericera cockerelli Herbivory on Volatile Emissions of Three Varieties of Solanum lycopersicum

Abstract

Domesticated tomato (Solanum lycopersicum L.) crops have presented an increased susceptibility to pests under field and greenhouse conditions. Among these pests is tomato/potato psyllid, Bactericera cockerelli Sulc (Hemiptera: Triozidae), a major pest in solanaceous crops. In this study, we evaluated volatile organic compound (VOC) emissions from the headspace in three healthy varieties of tomato plants (Floradade, Micro-Tom and wild) under greenhouse conditions using solid-phase microextraction and gas chromatography–mass spectrometry (SPME/GC-MS). Later, independent bioassays were performed to evaluate VOC emissions with three varieties infested with nymphs of B. cockerelli. The results in healthy plants showed markedly different VOC profiles in each variety (14 compounds for wild, 17 for Floradade and 4 for Micro-Tom). Plants infested with nymphs showed changes in VOC emissions distinctly in Floradade and wild varieties. We suggest that these qualitative differences in VOC profiles by the degree of domestication could explain the preferences of B. cockerelli.

Tomato Cultivars Resistant or Susceptible to Spider Mites Differ in Their Biosynthesis and Metabolic Profile of the Monoterpenoid Pathway

“…Considerable progress has been made in tomato plant cultivation by characterizing its volatile emissions during herbivore attack and investigating their crucial role in attracting natural enemies (Kant et al, 2004;Mayo-Hernández et al, 2019). However, the genetic basis underlying the constitutive release of VOCs involved in direct and indirect defenses, and their effect on herbivores, are still poorly understood.…”

“…We characterized the variation of the TSSM population in the field and climate-controlled conditions and compared the transcriptomic and volatile profiles. Many studies have compared genotypes to reintroduce beneficial traits such as VOC emissions from wild species into domesticated lines (Bleeker et al, 2009;Mayo-Hernández et al, 2019;Paudel et al, 2019). Here, we focused on two cluster cherry tomato cultivars with similar physical (similar trichome density; Supplementary Figure 8) and agronomic traits (fruit size, shape, color, and cluster architecture), but with contrasting TSSM susceptibility to isolate chemical traits involved in mite-resistance.…”

Chili Pepper Jojutla Morelos (Capsicum annuum L.), CJ-2018: A Variety Resistant to Bactericera cockerelli

“…However, for B. cockerelli, this relationship has not been established, although it was speculated that these compounds were involved in the repellent effect [ 39 , 40 ]. Mayo-Hernandez et al (2019) suggested that the induction of volatile organic compounds such as β-phellandrene and (+)-4-carene in an unidentified variety of wild tomato could be related to a decrease in oviposition of B. cockerelli [ 41 , 42 ]. The comparison of the metabolic profile between a susceptible variety (cv.…”

Exogenous Application of Polycationic Nanobactericide on Tomato Plants Reduces the Candidatus Liberibacter Solanacearum Infection

“…The tomato psyllids ( Bactericera cockerelli ) Ca Lso-positive were reared on tomato plants under greenhouse conditions [ 31 ] to induce infestation. Control plants were kept separated to avoid infestation.…”