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Virus‐induced plant volatiles mediate the olfactory behaviour of its insect vectors
Author(s) -
Chang Xuefei,
Wang Fang,
Fang Qi,
Chen Fei,
Yao Hongwei,
Gatehouse Angharad M. R.,
Ye Gongyin
Publication year - 2021
Publication title -
plant, cell and environment
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 2.646
H-Index - 200
eISSN - 1365-3040
pISSN - 0140-7791
DOI - 10.1111/pce.14069
Subject(s) - biology , green leaf volatiles , insect , rice plant , vector (molecular biology) , plant virus , botany , virus , agronomy , virology , herbivore , biochemistry , gene , recombinant dna
Plant viruses can manipulate their hosts to release odours that are attractive or repellent to their insect vectors. However, the volatile organic compounds (VOCs), either individually or as mixtures, which play a key role in the olfactory behaviour of insect vectors remains largely unknown. Our study focused on green rice leafhoppers (GRLHs) vectoring rice dwarf virus (RDV) revealed that RDV infection significantly induced the emission of ( E )‐β‐caryophyllene and 2‐heptanol by rice plants, which influenced the olfactory behaviour of both non‐viruliferous and viruliferous GRLHs. ( E )‐β‐caryophyllene attracted non‐viruliferous GRLHs to settle on RDV‐infected plants, but neither attracted nor repelled viruliferous GRLHs. In contrast, 2‐heptanol repelled viruliferous GRLHs to settle on RDV‐infected plants, but neither repelled nor attracted non‐viruliferous GRLHs. Suppression of ( E )‐β‐caryophyllene synthase OsCAS via CRISPR‐Cas9 to generate oscas ‐1 plants enabled us to confirm the important role played by ( E )‐β‐caryophyllene in modulating the virus‐vector‐host plant interaction. These novel results reveal the role of these virus‐induced VOCs in modulating the behaviour of its GRLH insect vector and may facilitate the design of new strategies for disease control through manipulation of plant volatile emissions.