Abstract
Endophytic fungi colonize healthy plant tissues and can in some cases induce systemic resistance to the host against biotic and abiotic stresses. In our previous study, Hypocrea lixii isolate F3ST1 was able to colonize onion plants endophytically and conferred resistance to them against onion thrips, Thrips tabaci. To further elucidate the mechanism of resistance, we examined the behavioral response of adult and larval stages of T. tabaci to endophyte-inoculated (E+) and endophyte-free (E−) onion plants/sections. In choice experiments, female T. tabaci preferred E− over E+ plants. The number of feeding punctures and eggs was more on E− than on E+ plants. Oviposition was reduced sixfold on E+ plants within a 72-h experimental period. In the Y-tube olfactometer assay, thrips showed a 3.3-fold preference for E− plants. In individual larval choice experiments, significantly more first and second instars were found on the leaf sections of E− as compared to the E+ plants. In the settlement preference assay with groups of second instars, more larvae preferred leaf sections from E− over E+ plants with incremental time. Our findings suggest that endophyte-colonized onion plants may trigger antixenotic repellence of T. tabaci, impacting their biology. This repellence could be exploited in thrips control programs by using endophyte-inoculated plants in the field.







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Akello J, Dubois T, Coyne D, Kyamanywa S (2008) Endophytic Beauveria bassiana in banana (Musa spp.) reduces banana weevil (Cosmopolites sordidus) fitness and damage. Crop Prot 27:1437–1441
Akutse KS, Maniania NK, Fiaboe KKM, Van den Berg J, Ekesi S (2013) Endophytic colonization of Vicia faba and Phaseolus vulgaris (Fabaceae) by fungal pathogens and their effects on the life-history parameters of Liriomyza huidobrensis (Diptera: Agromyzidae). Fungal Ecol 6:293–301
Birithia R, Subramanian S, Pappu HR, Sseruwagi P, Muthomi JW, Narla D (2011) First report of Iris yellow spot virus infecting onions in Kenya and Uganda. Plant Dis 95:1195
Birithia RK, Subramanian S, Pappu HR, Muthomi JW, Narla RD (2014) Resistance to Iris yellow spot virus and onion thrips among onion varieties grown in Kenya. Int J Trop Insect Sci 34:73–79
Bittleston LS, Brockmann F, Wcislo W, Van Bael SA (2011) Endophytic fungi reduce leaf-cutting ant damage to seedlings. Biol Lett 7:30–32
Cardoza YJ, Alborn HT, Tumlinson JH (2002) In vivo volatile emissions from peanut plants induced by simultaneous fungal infection and insect damage. J Chem Ecol 28:161–174
Cherry AJ, Banito A, Djegui D, Lomer C (2004) Suppression of the stem-borer Sesamia calamistis (Lepidoptera: Noctuidae) in maize following seed dressing, topical application and stem injection with African isolates of Beauveria bassiana. Int J Pest Manag 50:67–73
Childers CC (1997) Feeding and oviposition injuries to plants. In: Lewis T (ed) Thrips as crop pests. CAB International, Wallingford, pp 505–537
Clement SL, Hu J, Stewart AV, Wang B, Elberson LR (2011) Detrimental and neutral effects of a wild grass-fungal endophyte symbiotum on insect preference and performance. J Insect Sci 11:1–13
Cloyd RA (2009) Western flower thrips (Frankliniella occidentalis) management on ornamental crops grown in greenhouses: have we reached an impasse? Pest Tech 3:1–9
Duffey SS, Felton GW (1991) Enzymatic antinutritive defenses of the tomato plants against insects. In: Hedin PA (ed) Naturally occurring pest bioregulators. American Chemical Society, Washington DC, pp 166–197
Egger B, Koschier EH (2014) Behavioural responses of Frankliniella occidentalis Pergande larvae to methyl jasmonate and cis-jasmone. J Pest Sci 87:53–59
Everitt BS, Hothorn T (2013) HSAUR: a handbook of statistical analyses using R. R package. http://cran.r-project.org/package=HSAUR. Accessed 15 May 2014
Faeth SH (2002) Are endophytic fungi defensive plant mutualists? Oikos 98:25–36
Gachu SM, Muthomi JW, Narla RD, Nderitu JH, Olubayo FM, Wagacha JM (2012) Management of thrips (Thrips tabaci) in bulb onion by use of vegetable intercrops. Int J Agri Sci 2:393–402
Gurulingappa P, Sword GA, Murdoch G, McGee PA (2010) Colonization of crop plants by fungal entomopathogens and their effects on two insect pests when in planta. Biol Control 55:34–41
HCDA (Horticultural Crops Development Authority) (2012) Export statistics volumes. http://www.hcda.or.ke/Statistics/2012/2012%20Horticulture%20Validated%20Report.pdf/. Accessed 16 Jan 2014
Hothorn T, Bretz F, Westfall P (2008) Simultaneous inference in general parametric models. Biom J 50:346–363
Jallow MFA, Dugassa-Gobena D, Vidal S (2004) Indirect interaction between an unspecialized endophytic fungus and a polyphagous moth. Basic Appl Ecol 5:183–191
Jallow MFA, Dugassa-Gobena D, Vidal S (2008) Influence of an endophytic fungus on host plant selection by a polyphagous moth via volatile spectrum changes. Arthropod Plant Interact 2:53–62
Kaur HP, Singh B, Kaur A, Kaur S (2013) Antifeedent and toxic activity of endophytic Alternaria alternata against tobacco caterpillar Spodoptera litura. J Pest Sci 86:543–550
Leckie BM (2002) Effects of Beauveria bassiana mycelia and metabolites incorporated into synthetic diet and fed to larval Helicoverpa zea, and detection of endophytic Beauveria bassiana in tomato plants using PCR and ITS. PhD Dissertation, The University of Tennessee
Martin NA, Workman PJ, Buttler RC (2003) Insecticide resistance in onion thrips (Thrips tabaci) (Thysanoptera: thripidae). N Z J Crop Hortic Sci 31:99–106
Miller JR, Strickler KL (1984) Finding and accepting host plants. In: Bell WJ, Cardé RT (eds) Chemical ecology of insects. Chapman and Hall, London, pp 127–157
Mucciarelli M, Camusso W, Maffei M, Panicco P, Bicchi C (2007) Volatile terpenoids of endophyte-free and infected peppermint (Mentha piperita L.): chemical partitioning of a symbiosis. Microb Ecol 54:685–696
Muvea AM, Meyhöfer R, Subramanian S, Poehling H-M, Ekesi S, Maniania NK (2014) Colonization of onions by endophytic fungi and their impacts on the biology of Thrips tabaci. PLoS ONE 9:e108242
Nault BA, Shelton AM (2010) Impact of insecticide efficacy on developing action thresholds for pest management: a case study of onion thrips (Thysanoptera: Thripidae) on onion. J Econ Entomol 103:1315–1326
Nawrocka B (2003) Economic importance and the control method of Thrips tabaci Lindeman on onion. Bull OILB/SROP 26:321–324
Ownley BH, Gwinn KD, Vega FE (2010) Endophytic fungal entomopathogens with activity against plant pathogens: ecology and evolution. BioControl 55:113–128
Popay AJ, Bonos SA (2005) Biotic responses in endophytic grasses. In: Roberts CA, West CP, Spiers DE (eds) Neotyphodium in cool-season grasses. Blackwell, Ames, pp 163–185
Qawasmeh A, Bourke C, Lee S, Gray M, Wheatley W, Sucher N, Raman A (2011) GC-MS analysis of volatile secondary metabolites in Mediterranean and Continental Festuca arundinacea (Poaceae) infected with the fungal endophyte Neotyphodium coenophialum strain AR542. Acta Chromatogr 23:621–628
Rabinowitch HD, Currah L (2002) Allium crop science: recent advances. CAB International, Wallingford
Richmond DS (2007) Mediation of herbivore-natural enemy interactions by Neotyphodium endophytes: the role of insect behavioural response. In: Popay AJ, Thom ER (eds) Proceedings of the 6th international symposium on fungal endophytes of grasses, 25–28 March 2007, Christchurch. Grasslands Research and Practice Series No. 13. New Zealand Grasslands Association, Dunedin, pp 313–319
Richmond DS, Kunkel BA, Nethi S, Grewal PS (2004) Top-down and bottom-up regulation of herbivores: Spodoptera frugiperda turns tables on endophyte-mediated plant defence and virulence of an entomopathogenic nematode. Ecol Entomol 29:353–360
Rodriguez RJ, White JF Jr, Arnold AE, Redman RS (2009) Fungal endophytes: diversity and functional roles. New Phytol 182:314–330
Saikkonen K, Faeth SH, Helander M, Sullivan TJ (1998) Fungal endophytes: a continuum of interactions with host plants. Annu Rev Ecol Syst 29:319–343
Schulz B, Boyle C (2005) What are endophytes? In: Schulz B, Boyle C, Sieber TN (eds) Microbial root endophytes. Springer, Berlin, pp 1–13
Shrivastava G (2011) Production and roles of volatile secondary metabolites in interactions of the host plant tomato (Solanum lycopersicum L.) with other organisms at multi-trophic levels. PhD Dissertation, University of Tennessee
Sikora RA, Pocasangre L, Zum Felde A, Niere B, Vu TT, Dababat AA (2008) Mutualistic endophytic fungi and in-planta suppressiveness to plant parasitic nematodes. Biol Control 46:15–23
Stökl J, Brodmann J, Dafni A, Ayasse M, Hansson BS (2011) Smells like aphids: orchid flowers mimic aphid alarm pheromones to attract hoverflies for pollination. Proc R Soc B- Biol Sci 278:1216–1222
R Development Core Team (2013) R: a language and environment for statistical computing. http://www.r-project.org/. Accessed 20 Apr 2014
Thakur A, Kaur S, Kaur A, Singh V (2013) Enhanced resistance to Spodoptera litura in endophyte infected cauliflower plants. Environ Entomol 42:240–246
Trdan S, Vali N, Zezlina I, Bergant K, Znidar D (2005) Light blue sticky boards for mass trapping of onion thrips, Thrips tabaci Lindeman (Thysanoptera: Thripidae), in onion crops. J Plant Dis Prot 12:173–180
Vega FE, Goettel MS, Blackwell M, Chandler D, Jackson MA, Keller S, Koike M, Maniania NK, Monzón A, Ownley BH, Pell JK, Rangel DEN, Roy HE (2009) Fungal entomopathogens: new insights on their ecology. Fungal Ecol 2:149–159
Venables WN, Ripley B (2002) Modern applied statistics with S, 4th edn. http://cran.r-project.org/package=MASS. Accessed 10 May 2014
Webber J (1981) A natural control of Dutch elm disease. Nature 292:449–451
Wiesenborn WD, Morse JG (1986) Feeding rate of Scirtothrips citri (Moulton) (Thysanoptera: Thripidae) as influenced by life stage and temperature. Environ Entomol 15:763–766
Acknowledgments
This study was funded by BMZ (The German Federal Ministry for Economic Cooperation and Development) through GIZ (Deutsche Gesellschaft für Internationale Zusammenarbeit) through a project grant entitled “Implementation of integrated thrips and tospovirus management strategies in small-holder vegetable cropping systems of Eastern Africa” (project no. 11.7860.7-001.00, contract no. 81141840) for which we are grateful. The authors thank the icipe Thrips IPM Project staff for their technical assistance.
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Muvea, A.M., Meyhöfer, R., Maniania, N.K. et al. Behavioral responses of Thrips tabaci Lindeman to endophyte-inoculated onion plants. J Pest Sci 88, 555–562 (2015). https://doi.org/10.1007/s10340-015-0645-3
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DOI: https://doi.org/10.1007/s10340-015-0645-3


