title: Bemisia tabaci Q carrying tomato yellow leaf curl virus strongly suppresses host plant defenses.
abstract: The concurrence of tomato yellow leaf curl virus (TYLCV) with the spread of its vector Bemisia tabaci Q rather than B in China suggests a more mutualistic relationship between TYLCV and Q. Here, we investigated the hypothesis that viruliferous B and Q have different effects on plant defenses. We found the fecundity of nonviruliferous B, nonviruliferous Q, viruliferous Q and viruliferous B was 11.080, 12.060, 10.760, and 11.220 respectively on plants previously attacked by the other biotype, however, on their respective noninfested control leaves fecundity was 12.000, 10.880, 9.760, and 8.020 respectively. Only viruliferous B had higher fecundity on viruliferous Q-infested plants than on control plants. The longevity of viruliferous B showed the same phenomenon. At 1 d infestion, the jasmonic acid content in leaves noninfested and in leaves infested with nonviruliferous B, nonviruliferous Q, viruliferous B and viruliferous Q was 407.000, 281.333, 301.333, 266.667 and 134.000 ng/g FW, respectively. The JA content was lowest in viruliferous Q-infested leaves. The proteinase inhibitor activity and expression of JA-related upstream gene LOX and downstream gene PI II showed the same trend. The substantial suppression of host defenses by Q carrying TYLCV probably enhances the spread of Q and TYLCV in China.
authors.affiliation: Institute of Vegetables and Flowers, Chinese Academy of Agricultural Sciences, Beijing, 100081, China.
authors.forename: Xiaobin
authors.initials: X
authors.lastname: Shi
authors.affiliation: Institute of Vegetables and Flowers, Chinese Academy of Agricultural Sciences, Beijing, 100081, China.
authors.forename: Huipeng
authors.initials: H
authors.lastname: Pan
authors.affiliation: Institute of Vegetables and Flowers, Chinese Academy of Agricultural Sciences, Beijing, 100081, China.
authors.forename: Hongyi
authors.initials: H
authors.lastname: Zhang
authors.affiliation: Faculty of Life Sciences, Hubei University, Wuhan 430062, China.
authors.forename: Xiaoguo
authors.initials: X
authors.lastname: Jiao
authors.affiliation: Institute of Vegetables and Flowers, Chinese Academy of Agricultural Sciences, Beijing, 100081, China.
authors.forename: Wen
authors.initials: W
authors.lastname: Xie
authors.affiliation: Institute of Vegetables and Flowers, Chinese Academy of Agricultural Sciences, Beijing, 100081, China.
authors.forename: Qingjun
authors.initials: Q
authors.lastname: Wu
authors.affiliation: Institute of Vegetables and Flowers, Chinese Academy of Agricultural Sciences, Beijing, 100081, China.
authors.forename: Shaoli
authors.initials: S
authors.lastname: Wang
authors.affiliation: Institute of Vegetables and Flowers, Chinese Academy of Agricultural Sciences, Beijing, 100081, China.
authors.forename: Yong
authors.initials: Y
authors.lastname: Fang
authors.affiliation: Institute of Vegetables and Flowers, Chinese Academy of Agricultural Sciences, Beijing, 100081, China.
authors.forename: Gong
authors.initials: G
authors.lastname: Chen
authors.affiliation: Department of Entomology, University of Kentucky, Lexington, KY, 40546, USA.
authors.forename: Xuguo
authors.initials: X
authors.lastname: Zhou
authors.affiliation: Institute of Vegetables and Flowers, Chinese Academy of Agricultural Sciences, Beijing, 100081, China.
authors.forename: Youjun
authors.initials: Y
authors.lastname: Zhang
mesh_terms: D000818:Animals; D053839:Begomovirus / Q000502:physiology*; D002681:China; D003517:Cyclopentanes / Q000378:metabolism; D006430:Hemiptera / Q000821:virology*; D007303:Insect Vectors / Q000378:metabolism / Q000821:virology*; D018551:Solanum lycopersicum / Q000821:virology*; D054883:Oxylipins / Q000378:metabolism; D010935:Plant Diseases / Q000821:virology*; D018515:Plant Leaves / Q000821:virology
chemical_list: D003517:Cyclopentanes; D054883:Oxylipins; C011006:jasmonic acid