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Article Abstract
Glucose oxidase (GOX) is a representative compound found in most insect saliva that can suppress plant-defensive responses. However, little is known about the origin and role of GOX in the crucifer-specialized pest . In this study, we showed obvious regurgitation from the larval gut of and identified abundant peptides highly similar to known GOX. Three genes were verified with preferentially expressed in the gut. The heterologously expressed PxGOX2 confirmed its function to be a GOX, and it was detected in plant wounds together with the gut regurgitant. Further experiments revealed that PxGOX2 functioned as an effector and may suppress defensive responses in plant through the production of HO, which modulates levels of antagonistic salicylic acid and jasmonic acid. However, excessive HO in the host plant may be neutralized by peroxidase, thus forming defensive feedback. Our findings provided new insights into understanding the GOX-mediated insect-plant interactions.
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| http://dx.doi.org/10.1021/acs.jafc.3c06401 | DOI Listing |
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