Genistein induced by Frankliniella occidentalis feeding confers resistance to insect herbivores in peanut
Qian Wang , Xiaoran Wu , Ziwei Shi , Youlin Xia , Lifeng Liu , Yuanye Liu , Xiaobei Liu , Wenrui Liu , Xiujun Lu , Wei Guo , Dan Zhao
New Plant Protection ›› 2025, Vol. 2 ›› Issue (3) : e70014
Genistein induced by Frankliniella occidentalis feeding confers resistance to insect herbivores in peanut
The western flower thrips (Frankliniella occidentalis) is a major pest of peanuts. Cultivating and deploying resistant varieties is the most effective and economic method for F. occidentalis management. However, the resistance mechanism of peanuts to F. occidentalis infestation remains unknown. Here, the Tianfu 22 (TF22) and Jinong 5 (JN5) varieties were identified as thrips-resistant and thrips-susceptible, respectively, based on field screening carried out across two consecutive years. Metabolomic profiling showed that thrip-infested TF22 leaves exhibited differentially accumulated metabolites enriched in phenylpropanoid and secondary metabolite biosyntheses. Notably, some metabolites involved in the biosynthesis of phenylpropanoids, such as biochanin A, genistein, and 7-hydroxyflavone, were only induced in the infested TF22 leaves. External feeding and exogenous spraying confirmed that genistein reduced the pupation rate of thrips, decreasing its harm to peanuts. Furthermore, genistein significantly lowered the fecundity of Aphis craccivora and inhibited the weight gain of Helicoverpa armigera larvae. Three genes (CHS, CHI, and IFS) involved in genistein synthesis were significantly upregulated in infested TF22 plants. These results suggest that genistein is likely a pivotal resistance factor in peanuts, offering valuable insights for the cultivation and application of resistant cultivars.
Frankliniella occidentalis / genistein / induced resistance / peanut / phenylpropanoid metabolism
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2025 The Author(s). New Plant Protection published by John Wiley & Sons Australia, Ltd on behalf of Institute of Plant Protection, Chinese Academy of Agricultural Sciences.
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