Induced volatiles in the interaction between soybean (Glycine max) and the Mexican soybean weevil (Rhyssomatus nigerrimus)

Abstract

The present study analyzed the volatile compounds emitted by Glycine max (cv. FT-Cristalina-RCH) soybean plants: healthy plants and plants damaged mechanically or by the Mexican soybean weevil Rhyssomatus nigerrimus. The SPME method was used to compare the volatile profile of soybean plants in four different conditions. The volatile profile of G. max plants infested by R. nigerrimus was qualitatively and quantitatively different from that of healthy and mechanically damaged plants. Emission of 59 compounds was detected in the four treatments. Of these compounds, 19 were identified by comparison of the Kovats index, mass spectrum and retention times with those of synthetic standards. An increase in concentration of the volatiles (Z)-3-hexenyl acetate and the compound 1-octen-3-ol was observed when the soybean plants were mechanically damaged. The compounds mostly produced by the soybean plant during infestation by male and female R. nigerrimus were 1-octen-3-ol, 6-methyl-5-hepten-2-one, (E)-β-ocimene, salicylaldehyde, unknown 10, linalool, methyl salicylate, (Z)-8-dodecenyl acetate (ester 5), ketone 2 and geranyl acetone. Behavioral effects of the identified compounds during the insect-plant interaction and their conspecifics are discussed.

Volatiles from male honeydew excretions attract conspecific male spotted lanternflies, Lycorma delicatula (Hemiptera: Fulgoridae)

“…All of the compounds found in SLF honeydew are known to occur in both plants (43)(44)(45)(46)(47)(48)(49)(50)(51)(52) and insects (53)(54)(55)(56)(57)(58)(59)(60)(61)(62)(63)(64)(65). The five compounds tested for attraction all serve as pheromone components for species across multiple insect orders.…”

The Green Leaf Volatile (Z)-3-Hexenyl Acetate Is Differently Emitted by Two Varieties of Tulbaghia violacea Plants Routinely and after Wounding

“…For instance, in corn plants, Z3HAC was released in greater quantities by plants damaged by insects ( Elasmopalpus lignosellus larvae) than by plants not damaged or damaged manually (using a needle); notably, the volatile compound was released in large quantities after 24 and 96 h after treatment [ 21 ]. Instead, an increase of 7 or 18 times in the amount of Z3HAC emitted was observed using a SPME fiber for soybean leaves or pods mechanically damaged (with an entomological needle), in comparison to tissues damaged by insects ( Rhyssomatus nigerrimus , Mexican weevil of soy) or healthy plants [ 22 ].…”

Biotic and abiotic factors shaping bat activity in Maryland soybean fields

“…When fed upon by chewing‐insect herbivores, soybean plants produce significantly more volatiles than undamaged plants (Moraes et al, 2005), and volatiles are also produced during the night (Rostás & Eggert, 2008). Of the 59 compounds detected in soybean emissions (Espadas‐Pinacho et al, 2020), three dominant soybean HIPV compounds include ( E,E )‐α‐farnesene, methyl salicylate, and indole (Michereff et al, 2013). Indole is a common HIPV emitted by multiple crop plants, including soybean (Rostás & Eggert, 2008), peanut ( Arachis hypogaea ; Cardoza et al, 2003), and cotton ( Gossypium hirsutum ; McCall et al, 1994).…”