Olfaction in chemically mediated host seeking and oviposition behavior of mosquitoes

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1 Acta Entomologica Sinica October (10) : ISSN ( ) : 20 : ; ; ; ; : Q965 : A : (2007) Olfaction in chemically mediated host seeking and oviposition behavior of mosquitoes DU Yong2J un WU Zhong2Nan ( Institute of Health & Environment Wenzhou Medical College University Town Wenzhou Zhejiang China) Abstract : Olfaction plays crucial role in mosquito host seeking oviposition and searching for sugar sources. However the role of semiochemicals in mating behavior remains speculative. In this paper we summarized the research on mosquito olfaction and chemical ecology in the past 20 years. The olfactory receptors in the sensilla of the antenna maxillary palps and proboscis respond to the odors from the environment. The olfactory transduction and neural encoding and processing in the peripheral olfactory pathway start from the binding of odorant binding receptors ( OBP) with odors. The changes in sensitivity and response profile of olfactory receptor neurons as a result of blood meal are involved in modulating behavior of mosquito females. The carbon dioxide lactic acid and other odors released from animal and human skins attract mosquito upwind flight to the source in the host seeking. The volatiles from the oviposition site and the pheromone compounds originating from eggs larvae and pupae have been found attractive to the gravid females. The plant volatiles especially the flower fragrance helps mosquito adults search for sugars. Current repellents act by interfering directly or indirectly with olfaction. Some repellents inhibit the mosquito orientation flight by impeding its olfaction. It could be promising to find the active substances in the odors from animals human skins plants or oviposition sites. The understanding of the olfactory mechanism can allow us to develop new and effective tools for mosquito surveillance and control. Key words : Mosquito ; semiochemicals ; host seeking ; oviposition ; olfaction : E2mail : net Received : ; Accepted :

2 10 : 1061 Culex pipiens quinquefasciatus (Takken and Knols 1999) C. pipiens pallens 3 5 ( 80 %) 5 ( http : ΠΠrbm. who. intπ wmr2005π) (Bentley and Day 1989 ; Takken and Knols 1999) (Anton and Rospars ; Ishida et al ; Qiu et al. 2006) (WNV) (SARS) ( ) (Takken and Knols 1999 ; Zwiebel and Takken 2004 ; Puri et al. 2006) ( ) GC2MS (Bernier et al ; Curran et al. 2005) 346

3 1062 Acta Entomologica Sinica 50 ( Smallegange et al. 2005) ) (Braks et al. 2000) 12 ( Smallegange 232 et al. 2005) ( Takken 1991 ; Mboera et al. 2000) (Takken and Kline 1989) 102 (Dekker ( Krotoszynski et al. 1977) et al. 2005) 9 % (Mboera and Takken 1997) L2( ) (Allan et al. 2006) (Vale and Hall 1985) (Takken and Kline 1989) L2( ) L ( ) ( Hall et al. 1984) ( Geier et al. 1999a) Limburger ( Knols and de Jong 1996) Limburger ( Kline 1998 ) Brevibacterium linens B. epidermis (Braks et al. 1999) 37 2 ph (Braks and Takken 1999 ; Braks et al. 2001) (Steib et ( Geier al. 2001) ; Smallegange et al. 2005) (Njiru et al. 2006) (Costantini et al ; Mboera and Takken 1997 ; Braks and Takken 1999) (Braks and Takken et al. 1999a ; Bosch et al ; Meijerink et al ; Bernier et al ; Zwiebel and Takken (odor plume)

4 10 : (Lawrence and Pickett 1985 ; Blackwell et al. 114 (Mendki et al. 2000) 015 (Reisen and Meyer ; 1990 ; Reiter et al ) 015 Schoenoplectus acutus ( Walton and Workman 1998 ; Du and Millar 1999b) ( ) Plasmodium falciparum (Lacroix et al. 2005) (Williams et al. 2006) ( Millar et al ; Du and Millar 1999a) 32 2 (Olagbemiro et al. 2004) 1019 % (Du and Millar ) (Du and Millar ) Ascogregarina Toxorhynchites moctezuma T. taiwanensis ( Reeves amboinensis A. triseriatus 2004) (Collins and Blackwell 2002) (Bentley and Day 1989 ; Blackwell et al. 1993) 25 ng EAG (Allan and Kline 1995 ; ( - )2(5R 6S) Trexler et al. 2003) 1993) 42 ( - )2(5R 6S)

5 1064 Acta Entomologica Sinica Hekmat2Scafe et al ; Zhou et al. 2004) (McIver 1982) (2004) RT2PCR (Culicidae) ( An. gambiae complex) ( Grant and O Connell 1996) ( Meijerink and van Loon 1999) ( Grant and O Connell 1996) ( trichodea ) ( basiconia ) OBP (chaetica ) ( coleoconica ) ph (ampullacea) CquiOBP ph (McIver 1982) L2 ph (Leal 2005) OBPs ORs 7 G2 (Davis and Bowen 1994) ( GPCR) 79 ( Keller and Vosshall 2003) An. quadriannulatus 61 1Π3 ( Pitts and Zwiebel 2006) 630 ORs (Meijerink et al. 2001) 18 ORs (Hill et al. 2002) ( Kwon et al. OR 2006) 312 ORs ( G ) (neural processing) ORs ORs(Hill et al. 2002) ( ) (Hidebrand and Shepherd 1997) OR OR83b (odorant binding proteins OBPs) ( Xia and Zwiebel 2006) (olfactory receptors ORs) (odor OR83b degrading enzymes ODEs) kda 6 ) 16 AgOBP 35 kda C2 12 AgOBPs Plus2C ( Biessmann et al ; 12 OBP OBP Dor 27 ORs ORs OR83b (Larsson et al ; Jones et al. 2005) ORs Fox (2001) AgOR OBP 57 OBPs 29 AgOBPs ( 14

6 10 : 1065 ( Klowden and Blackmer 1987) (antennal lobe) (Anton et al. AgORs 2003 ; Anton and Rospars 2004) Hallem (2004) (Anton et al. 2003) AgORs 49 ORNs OR 50 ( Ignell et al. 2005) 313 (odor plume) ( Geier et al. 1999b) (Blackwell et al ; Du and Millar 1999a) L2 L2 Limburger 32 et al. 2001) Qiu (2006) (geranyl acetone) L2 (Seyoum et al. 2002) L2 EAG DEET 12 EAG (Meijerink and van Loon 1999) L2 ( An. Arabiensis An. Quadriannulatus An. atroparvus) ( IR3535) (van den Broek and den Otter ) Picaridin ( KBR 3023) DEET ( p2menthane 3 82diol ( Kwon et al. 2006) (Meijerink 4 (Dogan et al. 1999) PMD) DEET Pelargonium citrosum 012 % 011 % (Matsuda et al. 1996) ( ) ( ) ( 10 %

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