Vitellogenin from planthopper oral secretion acts as a novel effector to impair plant defenses

Vitellogenin from planthopper oral secretion acts as a novel effector to impair plant defenses

© 2021 The Authors. New Phytologist © 2021 New Phytologist Foundation.

Bibliographische Detailangaben
Veröffentlicht in:The New phytologist. - 1979. - 232(2021), 2 vom: 14. Okt., Seite 802-817
1. Verfasser: Ji, Rui (VerfasserIn)
Weitere Verfasser: Fu, Jianmei, Shi, Yu, Li, Jing, Jing, Maofeng, Wang, Lu, Yang, Shiying, Tian, Tian, Wang, Lihua, Ju, Jiafei, Guo, Huifang, Liu, Bin, Dou, Daolong, Hoffmann, Ary A, Zhu-Salzman, Keyan, Fang, Jichao
Format: Online-Aufsatz
Sprache:English
Veröffentlicht: 2021
Zugriff auf das übergeordnete Werk:The New phytologist
Schlagworte:Journal Article Research Support, Non-U.S. Gov't effector plant-insect interaction planthopper rice OsWRKY71 vitellogenin Vitellogenins
Beschreibung
Zusammenfassung:© 2021 The Authors. New Phytologist © 2021 New Phytologist Foundation.
Vitellogenin (Vg) is a well-known nutritious protein involved in reproduction in nearly all oviparous animals, including insects. Recently, Vg has been detected in saliva proteomes of several piercing-sucking herbivorous arthropods, including the small brown planthopper (Laodelphax striatellus, SBPH). Its function, however, remains unexplored. We investigated the molecular mechanism underlying SBPH orally secreted Vg-mediated manipulation of plant-insect interaction by RNA interference, phytohormone and H2 O2 profiling, protein-protein interaction studies and herbivore bioassays. A C-terminal polypeptide of Vg (VgC) in SBPH, when secreted into rice plants, acted as a novel effector to attenuate host rice defenses, which in turn improved insect feeding performance. Silencing Vg reduced insect feeding and survival on rice. Vg-silenced SBPH nymphs consistently elicited higher H2 O2 production, a well-established defense mechanism in rice, whereas expression of VgC in planta significantly hindered hydrogen peroxide (H2 O2 ) accumulation and promoted insect performance. VgC interacted directly with the rice transcription factor OsWRKY71, a protein which is involved in induction of H2 O2 accumulation and plant resistance to SBPH. These findings indicate a novel effector function of Vg: when secreted into host rice plants, this protein effectively weakened H2 O2 -mediated plant defense through its association with a plant immunity regulator
Beschreibung:Date Completed 29.09.2021
Date Revised 29.09.2021
published: Print-Electronic
Citation Status MEDLINE
ISSN:1469-8137
DOI:10.1111/nph.17620