Root exudate chemical cues of an invasive plant modulate oviposition behavior and survivorship of a malaria mosquito vector

Abstract Gravid female Anopheles gambiae mosquitoes identify suitable oviposition sites through a repertoire of cues, but the influence of allelochemicals, especially root phytochemicals in modulating this behavior and impacting subsequent progeny bionomics remains unexplored. We addressed these que...

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Autores principales:	Trizah K. Milugo, David P. Tchouassi, Reginald A. Kavishe, Rhoel R. Dinglasan, Baldwyn Torto
Formato:	article
Lenguaje:	EN
Publicado:	Nature Portfolio 2021
Materias:	Medicine R Science Q
Acceso en línea:	https://doaj.org/article/65c7284cad6243b4a2b01d8f0c1167d5
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spelling	oai:doaj.org-article:65c7284cad6243b4a2b01d8f0c1167d52021-12-02T16:26:29ZRoot exudate chemical cues of an invasive plant modulate oviposition behavior and survivorship of a malaria mosquito vector10.1038/s41598-021-94043-52045-2322https://doaj.org/article/65c7284cad6243b4a2b01d8f0c1167d52021-07-01T00:00:00Zhttps://doi.org/10.1038/s41598-021-94043-5https://doaj.org/toc/2045-2322Abstract Gravid female Anopheles gambiae mosquitoes identify suitable oviposition sites through a repertoire of cues, but the influence of allelochemicals, especially root phytochemicals in modulating this behavior and impacting subsequent progeny bionomics remains unexplored. We addressed these questions in the malaria vector Anopheles gambiae and its invasive host plant Parthenium hysterophorus. Using chemical analysis combined with laboratory behavioral assays, we demonstrate that a blend of terpenes, namely α-pinene, α-phellandrene, β-phellandrene, 3-carene and (E)-caryophyllene emitted from P. hysterophorus root exudate treated-water attracted gravid females. However, fewer eggs (55%) hatched in this treatment than in control water (66%). The sesquiterpene lactone parthenin, identified in both the natural aquatic habitat harboring P. hysterophorus and root exudate-treated water was found to be responsible for the ovicidal effect. Moreover, larvae exposed to parthenin developed 2 to 3 days earlier but survived 4 to 5 days longer as adults (median larval survival time = 9 days (all replicates);11 to 12 days as adults) than the non-exposed control (median larval survival time = 11 days (reps 1 & 2), 12 days (rep 3); 6 to 7 days as adults). These results improve our understanding of the risk and benefits of oviposition site selection by gravid An. gambiae females and the role root exudate allelochemicals could play on anopheline bionomics, with potential implications in malaria transmission.Trizah K. MilugoDavid P. TchouassiReginald A. KavisheRhoel R. DinglasanBaldwyn TortoNature PortfolioarticleMedicineRScienceQENScientific Reports, Vol 11, Iss 1, Pp 1-11 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	Medicine R Science Q
spellingShingle	Medicine R Science Q Trizah K. Milugo David P. Tchouassi Reginald A. Kavishe Rhoel R. Dinglasan Baldwyn Torto Root exudate chemical cues of an invasive plant modulate oviposition behavior and survivorship of a malaria mosquito vector
description	Abstract Gravid female Anopheles gambiae mosquitoes identify suitable oviposition sites through a repertoire of cues, but the influence of allelochemicals, especially root phytochemicals in modulating this behavior and impacting subsequent progeny bionomics remains unexplored. We addressed these questions in the malaria vector Anopheles gambiae and its invasive host plant Parthenium hysterophorus. Using chemical analysis combined with laboratory behavioral assays, we demonstrate that a blend of terpenes, namely α-pinene, α-phellandrene, β-phellandrene, 3-carene and (E)-caryophyllene emitted from P. hysterophorus root exudate treated-water attracted gravid females. However, fewer eggs (55%) hatched in this treatment than in control water (66%). The sesquiterpene lactone parthenin, identified in both the natural aquatic habitat harboring P. hysterophorus and root exudate-treated water was found to be responsible for the ovicidal effect. Moreover, larvae exposed to parthenin developed 2 to 3 days earlier but survived 4 to 5 days longer as adults (median larval survival time = 9 days (all replicates);11 to 12 days as adults) than the non-exposed control (median larval survival time = 11 days (reps 1 & 2), 12 days (rep 3); 6 to 7 days as adults). These results improve our understanding of the risk and benefits of oviposition site selection by gravid An. gambiae females and the role root exudate allelochemicals could play on anopheline bionomics, with potential implications in malaria transmission.
format	article
author	Trizah K. Milugo David P. Tchouassi Reginald A. Kavishe Rhoel R. Dinglasan Baldwyn Torto
author_facet	Trizah K. Milugo David P. Tchouassi Reginald A. Kavishe Rhoel R. Dinglasan Baldwyn Torto
author_sort	Trizah K. Milugo
title	Root exudate chemical cues of an invasive plant modulate oviposition behavior and survivorship of a malaria mosquito vector
title_short	Root exudate chemical cues of an invasive plant modulate oviposition behavior and survivorship of a malaria mosquito vector
title_full	Root exudate chemical cues of an invasive plant modulate oviposition behavior and survivorship of a malaria mosquito vector
title_fullStr	Root exudate chemical cues of an invasive plant modulate oviposition behavior and survivorship of a malaria mosquito vector
title_full_unstemmed	Root exudate chemical cues of an invasive plant modulate oviposition behavior and survivorship of a malaria mosquito vector
title_sort	root exudate chemical cues of an invasive plant modulate oviposition behavior and survivorship of a malaria mosquito vector
publisher	Nature Portfolio
publishDate	2021
url	https://doaj.org/article/65c7284cad6243b4a2b01d8f0c1167d5
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_version_	1718384055755472896

Root exudate chemical cues of an invasive plant modulate oviposition behavior and survivorship of a malaria mosquito vector

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