Abstract
BACKGROUND: Laodelphax striatellus, the small brown planthopper (SBPH), is an economically important pest, besides sucking damage, which transmits rice viruses to cause severe damages to rice. In the process of virus transmission, the host orientation behavior of insect is mainly driven by olfaction. In this context, the molecular basis of olfaction in SBPH is of particular interest. RESULTS: Here, we identified the gene that encodes olfactory receptor co-receptor (Orco) and analyzed its expression profiles in Rice stripe virus (RSV)-infected and RSV-free SBPH. It was found that LstrOrco shared high identity with other Orcos from different order insects. LstrOrco was mainly expressed in the head of SBPH, and its expression was significantly stimulated by RSV-infection. The behavioral bioassay revealed that viruliferous SBPH might have a stronger olfactory and seeking ability for rice than RSV-free insect. After silencing of LstrOrco expression, the olfaction and seeking behavior of nymphs for rice seedlings was significantly inhibited, mainly in the increase of the 'no response' percent and the prolongation of the response time. CONCLUSION: These results suggested that Orco played an important role in olfactory signaling and seeking behavior of SBPH, which provided a basic for future development of olfactory-based agriculture pest management strategies. © 2018 Society of Chemical Industry.
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Claims 8
Claim · model-written summary
LstrOrco shared high identity with Orco proteins of other insect orders.
- Taxon
- rice
Oryza sativae1 - Interactor
- small brown planthopper
Laodelphax striatellust1pest - Gene
- LstrOrcoe0
- Outcome
- identity with other Orcose0
- Direction
- highe0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Rice stripe virus”
t1“small brown planthopper”
e0“LstrOrco shared high identity with other Orcos from different order insects.”
e1“damages to rice.”
Claim · model-written summary
LstrOrco was mainly expressed in the planthopper head.
- Taxon
- riceOryza sativae1
- Interactor
- SBPHe0pest
- Gene
- LstrOrcoe0
- Outcome
- expressed in the head of SBPHe0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“LstrOrco was mainly expressed in the head of SBPH”
e1“damages to rice.”
Claim · model-written summary
RSV infection significantly stimulated LstrOrco expression in planthoppers.
- Taxon
- riceOryza sativae2
- Treatment
- RSV-infectione0
- Interactor
- SBPHe1pest
- Second interactor
- Rice stripe virusTenuivirus oryzaclavataee3pathogen
- Gene
- LstrOrcoe1
- Outcome
- expressione0
- Direction
- stimulatede0
- Comparator
- RSV-free SBPHe3
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“its expression was significantly stimulated by RSV-infection.”
e1“LstrOrco was mainly expressed in the head of SBPH”
e2“damages to rice.”
e3“Rice stripe virus (RSV)-infected and RSV-free SBPH.”
Claim · model-written summary
Virus-carrying planthoppers might have stronger olfactory and rice-seeking ability than virus-free insects.
- Taxon
- riceOryza sativae0
- Interactor
- SBPHe0pest
- Outcome
- olfactory and seeking ability for ricee0
- Direction
- strongere0
- Comparator
- RSV-free insecte0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“viruliferous SBPH might have a stronger olfactory and seeking ability for rice than RSV-free insect.”
Claim · model-written summary
Silencing LstrOrco significantly inhibited planthopper nymph olfaction and seeking of rice seedlings.
- Taxon
- riceOryza sativae0
- Organ / stage
- seedlingse0
- Treatment
- silencing of LstrOrco expressione0
- Interactor
- nymphse0pest
- Gene
- LstrOrcoe0
- Outcome
- olfaction and seeking behavior of nymphs for rice seedlingse0
- Direction
- inhibitede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“After silencing of LstrOrco expression, the olfaction and seeking behavior of nymphs for rice seedlings was significantly inhibited”
Claim · model-written summary
Silencing LstrOrco increased the percentage of planthopper nymphs with no response to rice seedlings.
- Taxon
- riceOryza sativae1
- Treatment
- silencing of LstrOrco expressione2
- Interactor
- nymphse3pest
- Gene
- LstrOrcoe2
- Outcome
- 'no response' percente0
- Direction
- increasee0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“mainly in the increase of the 'no response' percent and the prolongation of the response time.”
e1“rice seedlings”
e2“silencing of LstrOrco expression”
e3“behavior of nymphs”
Claim · model-written summary
Silencing LstrOrco prolonged the planthopper response time to rice seedlings.
- Taxon
- riceOryza sativae1
- Treatment
- silencing of LstrOrco expressione2
- Interactor
- nymphse3pest
- Gene
- LstrOrcoe2
- Outcome
- response timee0
- Direction
- prolongatione0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“mainly in the increase of the 'no response' percent and the prolongation of the response time.”
e1“rice seedlings”
e2“silencing of LstrOrco expression”
e3“behavior of nymphs”
Claim · model-written summary
The authors inferred that Orco contributes to planthopper olfactory signaling and rice-seeking behavior.
- Taxon
- riceOryza sativae1
- Interactor
- SBPHe0pest
- Gene
- Orcoe0
- Outcome
- olfactory signaling and seeking behavior of SBPHe0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Orco played an important role in olfactory signaling and seeking behavior of SBPH”
e1“damages to rice.”
The same questions in other papers
loss of function · pest · Oryza sativa (rice)Positive and negative results
6 papers in the same direction as this paper · 15 in the opposite direction
- negative
- negative
- negative
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See all 22 papers →Claims are grouped by organism, treatment and what was measured or targeted. A paper counts as positive when any of its claims in the group is positive.