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(E)-Nerolidol is a volatile signal that induces defenses against insects and pathogens in tea plants
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Journal Article
(E)-Nerolidol is a volatile signal that induces defenses against insects and pathogens in tea plants
2020
Overview
Plants release large amounts of volatile organic compounds (VOCs) in response to attackers. Several VOCs can serve as volatile signals to elicit defense responses in undamaged tissues and neighboring plants, but many questions about the ecological functions of VOCs remain unanswered. Tea plants are impacted by two harmful invaders, the piercing herbivore
Empoasca
(
Matsumurasca
)
onukii
Matsuda and the pathogen
Colletotrichum fructicola
. To determine the VOC signals in tea, we confirmed CsOPR3 as a marker gene and set up a rapid screening method based on a 1.51 kb
CsOPR3
promoter fused with a β-glucuronidase (GUS) reporter construct (
OPR3p::GUS
) in
Arabidopsis
. Using this screening system, a terpenoid volatile (
E
)-nerolidol was identified as a potent signal that elicits plant defenses. The early responses triggered by (
E
)-nerolidol included the activation of a mitogen-activated protein kinase and WRKY, an H
2
O
2
burst, and the induction of jasmonic acid and abscisic acid signaling. The induced plants accumulated high levels of defense-related chemicals, which possessed broad-spectrum anti-herbivore or anti-pathogen properties, and ultimately triggered resistance against
Empoasca onukii
and
Colletotrichum fructicola
in tea. We propose that these findings can supply an environmentally friendly management strategy for controlling an insect pest and a disease of tea plants.
Publisher
Nature Publishing Group UK,Oxford University Press
Subject
/ Biomedical and Life Sciences
/ Ecology
/ Insects
/ Kinases
/ Piercing
/ Plant Breeding/Biotechnology
/ Tea
/ VOCs
