Pea aphid,Acyrthosiphon pisum,is a serious pest of many different leguminous plants,and it mainly relies on its odorant receptors(Ors)to discriminate among host species.However,less is known about the role that Ors pl...Pea aphid,Acyrthosiphon pisum,is a serious pest of many different leguminous plants,and it mainly relies on its odorant receptors(Ors)to discriminate among host species.However,less is known about the role that Ors play in the host plant location.In this study,we identified a novel conserved odorant receptor clade by phylogenetic analysis,and conducted the functional analysis of ApisOr23 in A.pisum.The results showed that the homologous Ors from A.pisum,Aphis glycines and Aphis gossypii share 94.28% identity in amino acid sequences.Moreover,conserved motifs were analyzed using the annotated homologous Or23 from eight aphid species,providing further proof of the high conservation level of the Or23 clade.According to the tissue expression pattern analysis,ApisOr23 was mainly expressed in the antennae.Further functional study using a heterologous Xenopus expression system revealed that ApisOr23 was tuned to five plant volatiles,namely trans-2-hexen-1-al,cis-2-hexen-1-ol,1-heptanol,4’-ethylacetophenone,and hexyl acetate.Among them,trans-2-hexen-1-al,which is one of the main volatile organic compounds released from legume plants,activated the highest response of ApisOr23.Our findings suggest that the conserved Or23 clade in most aphid species might play an important role in host plant detection.展开更多
The nicotinic acetylcholine receptors （nAchRs） are cholinergic receptors that form ligand-gated ion channels by ifve subunits in insect and vertebrate nervous systems. The insect nAChR is the molecular target of a c...The nicotinic acetylcholine receptors （nAchRs） are cholinergic receptors that form ligand-gated ion channels by ifve subunits in insect and vertebrate nervous systems. The insect nAChR is the molecular target of a class of insecticides, neonicotinoids. Here, we identiifed and cloned 11 candidate nAChR subunit genes in Acyrthosiphon pisum using genome-based bioinformatics combined modern molecular techniques. Most A. pisum nAChRs including α1, α2, α3, α4, α6, α8, and β1 show highly sequence identities with the counterparts of other insects examined. Expression proifles analysis showed that all subunit genes were expressed in adult head. At least two subunits have alternative splicing that obviously increase A. pisum nicotinic receptor diversity. This study will be invaluable for exploring the molecular mechanisms of neonicotinoid-like insecticides in sucking pests, and for ultimately establishing the screening platform of novel insecticides.展开更多
为了明确紫外线(UV-B)辐射对红色型和绿色型豌豆蚜生物学特性的影响,本研究将2种不同色型豌豆蚜的初生若蚜经过40 W UV-B波段紫外线每日照射30 min,在3种温度梯度(16℃、20℃、24℃)和2种苜蓿品种"甘农3号"和"甘农5号&qu...为了明确紫外线(UV-B)辐射对红色型和绿色型豌豆蚜生物学特性的影响,本研究将2种不同色型豌豆蚜的初生若蚜经过40 W UV-B波段紫外线每日照射30 min,在3种温度梯度(16℃、20℃、24℃)和2种苜蓿品种"甘农3号"和"甘农5号"条件下,在人工气候箱中单头饲养,测定各个处理豌豆蚜的发育历期、体质量差和相对日均体质量增长率等生物学参数。结果显示:在"甘农3号"上,16℃时,在UV-B辐射对2种色型豌豆蚜的发育历期、体质量差和日均体质量增长率均无显著影响(P>0.05);在20℃时,UV-B辐射下红色型豌豆蚜的发育历期显著延长(P<0.05),相对日均体质量增长率也显著减少(P<0.05),体质量差无显著变化(P>0.05);而在24℃时,UV-B辐射下绿色型豌豆蚜的发育历期显著延长(P<0.05),体质量差和相对日均体质量增长率也显著减少(P<0.05)。在"甘农5号"上,在16℃时,UV-B辐射下红色型豌豆蚜的发育历期显著延长(P<0.05),体质量差和相对日均体质量增长率也显著减少(P<0.05);在20℃和24℃时,UV-B辐射绿色型豌豆蚜的发育历期显著延长(P<0.05),体质量差和相对日均体质量增长率也显著减少(P<0.05)。由此可知,UV-B辐射对豌豆蚜的影响与温度和苜蓿品种均密切相关。展开更多
基金funded by the National Natural Science Foundation of China(31572072 and 31725023)the Intergovernmental International Science,Technology and Innovation Cooperation Key Project,China(2019YFE0105800)the Shenzhen Science and Technology Program,China(KQTD20180411143628272)。
文摘Pea aphid,Acyrthosiphon pisum,is a serious pest of many different leguminous plants,and it mainly relies on its odorant receptors(Ors)to discriminate among host species.However,less is known about the role that Ors play in the host plant location.In this study,we identified a novel conserved odorant receptor clade by phylogenetic analysis,and conducted the functional analysis of ApisOr23 in A.pisum.The results showed that the homologous Ors from A.pisum,Aphis glycines and Aphis gossypii share 94.28% identity in amino acid sequences.Moreover,conserved motifs were analyzed using the annotated homologous Or23 from eight aphid species,providing further proof of the high conservation level of the Or23 clade.According to the tissue expression pattern analysis,ApisOr23 was mainly expressed in the antennae.Further functional study using a heterologous Xenopus expression system revealed that ApisOr23 was tuned to five plant volatiles,namely trans-2-hexen-1-al,cis-2-hexen-1-ol,1-heptanol,4’-ethylacetophenone,and hexyl acetate.Among them,trans-2-hexen-1-al,which is one of the main volatile organic compounds released from legume plants,activated the highest response of ApisOr23.Our findings suggest that the conserved Or23 clade in most aphid species might play an important role in host plant detection.
基金supported by the National 973 Program of China(2012CB114104)the Beijing Natural Science FoundationChina (6132028)
文摘The nicotinic acetylcholine receptors （nAchRs） are cholinergic receptors that form ligand-gated ion channels by ifve subunits in insect and vertebrate nervous systems. The insect nAChR is the molecular target of a class of insecticides, neonicotinoids. Here, we identiifed and cloned 11 candidate nAChR subunit genes in Acyrthosiphon pisum using genome-based bioinformatics combined modern molecular techniques. Most A. pisum nAChRs including α1, α2, α3, α4, α6, α8, and β1 show highly sequence identities with the counterparts of other insects examined. Expression proifles analysis showed that all subunit genes were expressed in adult head. At least two subunits have alternative splicing that obviously increase A. pisum nicotinic receptor diversity. This study will be invaluable for exploring the molecular mechanisms of neonicotinoid-like insecticides in sucking pests, and for ultimately establishing the screening platform of novel insecticides.
文摘为了明确紫外线(UV-B)辐射对红色型和绿色型豌豆蚜生物学特性的影响,本研究将2种不同色型豌豆蚜的初生若蚜经过40 W UV-B波段紫外线每日照射30 min,在3种温度梯度(16℃、20℃、24℃)和2种苜蓿品种"甘农3号"和"甘农5号"条件下,在人工气候箱中单头饲养,测定各个处理豌豆蚜的发育历期、体质量差和相对日均体质量增长率等生物学参数。结果显示:在"甘农3号"上,16℃时,在UV-B辐射对2种色型豌豆蚜的发育历期、体质量差和日均体质量增长率均无显著影响(P>0.05);在20℃时,UV-B辐射下红色型豌豆蚜的发育历期显著延长(P<0.05),相对日均体质量增长率也显著减少(P<0.05),体质量差无显著变化(P>0.05);而在24℃时,UV-B辐射下绿色型豌豆蚜的发育历期显著延长(P<0.05),体质量差和相对日均体质量增长率也显著减少(P<0.05)。在"甘农5号"上,在16℃时,UV-B辐射下红色型豌豆蚜的发育历期显著延长(P<0.05),体质量差和相对日均体质量增长率也显著减少(P<0.05);在20℃和24℃时,UV-B辐射绿色型豌豆蚜的发育历期显著延长(P<0.05),体质量差和相对日均体质量增长率也显著减少(P<0.05)。由此可知,UV-B辐射对豌豆蚜的影响与温度和苜蓿品种均密切相关。
