Silencing of an odorant binding protein (SaveOBP10) involved in the behavioural shift of the wheat aphid Sitobion avenae (Fabricius). Issue 5 (13th May 2022)

• Record Type: Journal Article
• Authors: Ullah, Rana Muhammad Kaleem; Waris, Muhammad Irfan; Qureshi, Sundas Rana; Rasool, Fatima; Duan, Shuang‐Gang; Zaka, Syed Muhammad; Atiq, Muhammad Nauman; Wang, Man‐Qun
• Is Part Of: Insect molecular biology. Volume 31:Issue 5(2022)
• Page Start: 568
• Page End: 584
• Publication Date: 2022-05-13
• Subjects: behaviour response -- binding affinity -- odorant binding protein -- RNA interference -- wheat volatiles; Insects -- Molecular aspects -- Periodicals; 595.7
• DOI: 10.1111/imb.12780
• Languages: English
• ISSNs: 0962-1075

Abstract

Abstract: Insects are highly reliant on their active olfactory system in which odorant binding proteins play a role to selectivity and sensitivity during odour perception and processing. This study sets out to determine whether and to which extent the antennal loaded SaveOBP10 in English grain aphid Sitobion avenae, contributes in olfactory processing during host selection. To understand this possible relationship, we purified the SaveOBP10 recombinant protein and performed fluorescence ligand binding tests, molecular docking, RNA interference (RNAi) and behavioural trials. The results showed that SaveOBP10 had strong binding affinities (Ki ≤5 μM) with most of wheat plant volatiles at pH 5.0 as compared to pH 7.4. In Y‐tube olfactometer bioassays, the S. avenae was attracted behaviourally towards pentadecane, butylated hydroxytoluene, tetradecane and β‐caryophyllene however repelled by naphthalene. After RNAi of SaveOBP10, the aphid showed nonattraction towards β‐caryophyllene and nonsignificant behavioural response to pentadecane, butylated hydroxytoluene and tetradecane. Furthermore, the three‐dimensional structure modelling and molecular docking of SaveOBP10 were performed to the volatiles with high binding abilities. Together these findings indicate that SaveOBP10 can bind more strongly to the volatiles that involved in S. avenae behaviour regulation and possibly will contribute effectively in S. avenae integrated pest management. Abstract : SaveOBP10 from Sitobion avenae could bind with most of wheat volatiles. SaveOBP10 involved in S. avenae behavior regulation. SaveOBP10's interaction specificity was illustrated by three‐dimensional modeling (3D) and molecular docking.