Aphid performance changes with plant defense mediated by Cucumber mosaic virus titer.
BACKGROUND
Cucumber mosaic virus (CMV) causes appreciable losses in vegetables, ornamentals and agricultural crops. The green peach aphid, Myzus persicae Sulzer (Aphididae) is one of the most efficient vectors for CMV. The transmission ecology of aphid-vectored CMV has been well investigated. However, the detailed description of the dynamic change in the plant-CMV-aphid interaction associated with plant defense and virus epidemics is not well known.


RESULTS
In this report, we investigated the relationship of virus titer with plant defense of salicylic acid (SA) and jasmonic acid (JA) during the different infection time and their interaction with aphids in CMV-infected tobacco plants. Our results showed that aphid performance changed with virus titer and plant defense on CMV-inoculated plants. At first, plant defense was low and aphid number increased gradually. The plant defense of SA signaling pathway was induced when virus titer was at a high level, and aphid performance was correspondingly reduced. Additionally, the winged aphids were increased.


CONCLUSIONS
Our results showed that aphid performance was reduced due to the induced plant defense mediated by Cucumber mosaic virus titer. Additionally, some wingless aphids became to winged aphids. In this way CMV could be transmitted with the migration of winged aphids. We should take measures to prevent aphids in the early stage of their occurrence in the field to prevent virus outbreak.
Key Laboratory of Integrated Management of the Pests and Diseases on Horticultural Crops in Hunan Province, Hunan Plant Protection Institute, Hunan Academy of Agricultural Sciences, Changsha, 410125, China.
Xiaobin
X
Shi
Key Laboratory of Integrated Management of the Pests and Diseases on Horticultural Crops in Hunan Province, Hunan Plant Protection Institute, Hunan Academy of Agricultural Sciences, Changsha, 410125, China.
Yang
Y
Gao
Key Laboratory of Integrated Management of the Pests and Diseases on Horticultural Crops in Hunan Province, Hunan Plant Protection Institute, Hunan Academy of Agricultural Sciences, Changsha, 410125, China.
Shuo
S
Yan
Key Laboratory of Integrated Management of the Pests and Diseases on Horticultural Crops in Hunan Province, Hunan Plant Protection Institute, Hunan Academy of Agricultural Sciences, Changsha, 410125, China.
Xin
X
Tang
Department of Entomology, University of Kentucky, Lexington, KY, 40546, USA.
Xuguo
X
Zhou
Key Laboratory of Integrated Management of the Pests and Diseases on Horticultural Crops in Hunan Province, Hunan Plant Protection Institute, Hunan Academy of Agricultural Sciences, Changsha, 410125, China. dyzhang78@163.com.|Longping Branch, Graduate College, Hunan University, Changsha, 410125, China. dyzhang78@163.com.
Deyong
D
Zhang
Key Laboratory of Integrated Management of the Pests and Diseases on Horticultural Crops in Hunan Province, Hunan Plant Protection Institute, Hunan Academy of Agricultural Sciences, Changsha, 410125, China. haoasliu@163.com.|Longping Branch, Graduate College, Hunan University, Changsha, 410125, China. haoasliu@163.com.
Yong
Y
Liu
D000818:Animals; D001042:Aphids / Q000821:virology*; D017799:Cucumovirus / Q000302:isolation & purification*; D003517:Cyclopentanes / Q000378:metabolism; D054884:Host-Pathogen Interactions; D007303:Insect Vectors; D054883:Oxylipins / Q000378:metabolism; D010935:Plant Diseases / Q000276:immunology* / Q000821:virology*; D020156:Salicylic Acid / Q000378:metabolism; D014026:Nicotiana / Q000276:immunology* / Q000821:virology*
D003517:Cyclopentanes; D054883:Oxylipins; C011006:jasmonic acid; D020156:Salicylic Acid
Cucumber mosaic virus; Jasmonic acid; Myzus persicae; Plant defense; Salicylic acid