Potent Attractant for Root-Knot Nematodes in Exudates from Seedling Root Tips of Two Host Species

Scientific Reports
Rasa ČepulytėValerie M Williamson

Abstract

Root-knot nematodes (RKN; Meloidogyne spp.) can parasitize over 2,000 plant species and are generally considered to be the most agriculturally damaging group of plant-parasitic nematodes worldwide. Infective juveniles (J2) are non-feeding and must locate and invade a host before their reserves are depleted. However, what attracts J2 to appropriate root entry sites is not known. An aim of this research is to identify semiochemicals that attract RKN to roots. J2 of the three RKN species tested are highly attracted to root tips of both tomato and Medicago truncatula. For both hosts, mutants defective in ethylene signaling were found to be more attractive than those of wild type. We determined that cell-free exudates collected from tomato and M. truncatula seedling root tips were highly attractive to M. javanica J2. Using a pluronic gel-based microassay to monitor chemical fractionation, we determined that for both plant species the active component fractionated similarly and had a mass of ~400 based on size-exclusion chromatography. This characterization is a first step toward identification of a potent and specific attractant from host roots that attracts RKN. Such a compound is potentially a valuable tool for developing novel an...Continue Reading

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Citations

Jun 6, 2019·Pest Management Science·Alessandra GuerrieriHarro J Bouwmeester
Oct 17, 2019·Frontiers in Plant Science·Kazuki SatoKen Shirasu
Aug 9, 2020·Frontiers in Plant Science·Yohana LaloumMaïté Vicré
Feb 23, 2020·Frontiers in Plant Science·Md Maniruzzaman Sikder, Mette Vestergård
Dec 29, 2019·Scientific Reports·Deborah Elizabeth CoxJohnathan J Dalzell
Aug 28, 2020·Frontiers in Plant Science·Allen Yi-Lun TsaiShinichiro Sawa
Jul 28, 2020·Insects·Tiffany BaiocchiAdler R Dillman
Aug 15, 2020·Frontiers in Plant Science·Fereidoun Forghani, Abolfazl Hajihassani
Sep 13, 2020·International Journal of Molecular Sciences·Pallavi KumariMaya Kleiman
Nov 15, 2019·International Journal for Parasitology·Steven DyerJohnathan J Dalzell
Jan 1, 2020·Molecular Plant·Morihiro OotaShinichiro Sawa
Jan 21, 2021·Molecular Plant-microbe Interactions : MPMI·Sofia R CostaUlrike Mathesius
May 6, 2021·Journal of Experimental Botany·Ulrike Mathesius, Sofia R Costa
Jun 12, 2021·The New Phytologist·Md Maniruzzaman SikderMogens Nicolaisen
Feb 1, 2022·Journal of Agricultural and Food Chemistry·Rasa Čepulytė, Vincas Bu da

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Methods Mentioned

BETA
size exclusion chromatography
PCR
dissecting

Software Mentioned

R

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