Manipulation of Plant Defense Responses by the Tomato Psyllid (Bactericerca cockerelli) and Its Associated Endosymbiont Candidatus Liberibacter Psyllaurous

被引:94
作者
Casteel, Clare L. [1 ]
Hansen, Allison K. [2 ]
Walling, Linda L. [3 ,5 ]
Paine, Timothy D. [4 ,5 ]
机构
[1] Cornell Univ, Boyce Thompson Inst Plant Res, Ithaca, NY 14853 USA
[2] Yale Univ, Dept Ecol & Evolutionary Biol, New Haven, CT USA
[3] Univ Calif Riverside, Dept Bot & Plant Sci, Riverside, CA 92521 USA
[4] Univ Calif Riverside, Dept Entomol, Riverside, CA 92521 USA
[5] Univ Calif Riverside, Ctr Dis Vector Res, Riverside, CA 92521 USA
来源
PLOS ONE | 2012年 / 7卷 / 04期
关键词
APHID BREVICORYNE-BRASSICAE; MEDIATED INTERACTIONS; INSECT VECTOR; ARABIDOPSIS; IMMUNITY; PHYTOPLASMA; MECHANISMS; RESISTANCE; SALICYLATE; PATHOGENS;
D O I
10.1371/journal.pone.0035191
中图分类号
O [数理科学和化学]; P [天文学、地球科学]; Q [生物科学]; N [自然科学总论];
学科分类号
07 ; 0710 ; 09 ;
摘要
Some plant pathogens form obligate relationships with their insect vector and are vertically transmitted via eggs analogous to insect endosymbionts. Whether insect endosymbionts manipulate plant defenses to benefit their insect host remains unclear. The tomato psyllid, Bactericerca cockerelli (Sulc), vectors the endosymbiont "Candidatus Liberibacter psyllaurous" (Lps) during feeding on tomato (Solanum lycopersicum L.). Lps titer in psyllids varied relative to the psyllid developmental stage with younger psyllids harboring smaller Lps populations compared to older psyllids. In the present study, feeding by different life stages of B. cockerelli infected with Lps, resulted in distinct tomato transcript profiles. Feeding by young psyllid nymphs, with lower Lps levels, induced tomato genes regulated by jasmonic acid (JA) and salicylic acid (SA) (Allene oxide synthase, Proteinase inhibitor 2, Phenylalanine ammonia-lyase 5, Pathogenesis-related protein 1) compared to feeding by older nymphs and adults, where higher Lps titers were found. In addition, inoculation of Lps without insect hosts suppressed accumulation of these defense transcripts. Collectively, these data suggest that the endosymbiont-like pathogen Lps manipulates plant signaling and defensive responses to benefit themselves and the success of their obligate insect vector on their host plant.
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页数:10
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