Hall, David ORCID: https://orcid.org/0000-0002-7887-466X, Kihika, Ruth, Tehouassi, David P, Ng'ang'a, Margaret M, Beck, John J and Torto, B (2020) Compounds associated with infection by the root-knot Nematode, Meloidogyne javanica influence the ability of infective juveniles to recognize host plants. Journal of Agricultural and Food Chemistry, 68 (34). pp. 9100-9109. ISSN 0021-8561 (Print), 1520-5118 (Online) (doi:10.1021/acs.jafc.0c03386)

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Abstract

Plant root chemistry is altered by parasitism of plant parasitic nematodes (PPN). Here, we 2 investigated the influence of the infective stage juveniles (J2) of Meloidogyne javanica in 3 inducing tomato (Solanum lycopersicum) root volatiles, and chemotactic effect on conspecifics. 4 In olfactometer assays, J2 avoided roots of 2-day infected plants but preferred 7-day infected 5 tomato compared to healthy plants. Chemical analysis showed a two- to seven-fold increase in 6 the amounts of monoterpenes emitted from tomato roots infected with M. javanica relative to 7 healthy roots. In further bioassays, the monoterpenes β-pinene, (+)-(2)-carene, α-phellandrene, 8 and β-phellandrene differentially attracted (51-87%) J2 relative to control. Concurrent reduction 9 and increase in the levels of methyl salicylate and (Z)-methyl dihydrojasmonate, respectively, in 10 the root volatiles reduced J2 responses. These results demonstrate that the host plant can alter its 11 root volatile composition to inhibit PPN attack. The observed plant-produced inhibition of J2 12 warrants further investigation as a potential management tool for growers.

Item Type:	Article
Uncontrolled Keywords:	Meloidogyne javanica; Solanum lycopersicum; root volatiles; chemotaxis
Subjects:	Q Science > QD Chemistry Q Science > QK Botany S Agriculture > SB Plant culture
Faculty / School / Research Centre / Research Group:	Faculty of Engineering & Science Faculty of Engineering & Science > Natural Resources Institute Faculty of Engineering & Science > Natural Resources Institute > Agriculture, Health & Environment Department Faculty of Engineering & Science > Natural Resources Institute > Chemical Ecology Research Group
Last Modified:	25 Apr 2022 08:54
URI:	http://gala.gre.ac.uk/id/eprint/29579

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