Migration and penetration of Meloidogyne enterolobii and M. incognita in soil columns with tomato and marigold

Oliveira, Ana Karina dos Santos; Pedrosa, Elvira M. R.; Dickson, D. W.; Vau, Silvia; Leitão, Diego Arruda Huggins de Sá; Silva, Ênio Farias de França e

doi:10.1007/s10658-019-01889-7

Cited by 6 publications

(3 citation statements)

References 17 publications

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“…M. hapla and M. chitwoodi , which are considered cryophiles, showed a greater motility rate at 18ºC than at 24ºC ( Pinkerton et al, 1987 ). In addition, J2 of M. enterolobii were found to be more mobile than M. incognita at 20ºC ( Oliveira et al, 2020 ).…”

Section: Discussionmentioning

confidence: 99%

“…Thus, soil column assays provide more realistic results to field conditions ( Spence et al, 2008 ). Preferential migration of J2 towards good hosts has been observed ( Dalzell et al, 2011 ; Dutta et al, 2011 ; Prot, 1976 ); however, Meloidogyne J2 can randomly migrate long distances even under plant-free conditions ( Leitão et al, 2021b ; Pinkerton et al, 1987 ; Oliveira et al, 2020 ). Despite the economic importance of M. enterolobii to agriculture and food security and the amount of information available focusing on this nematode species in the last 20 years, little information is available about its migratory behavior within different soils.…”

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confidence: 99%

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Vertical Migration of Second-stage Juveniles of Meloidogyne enterolobii as Influenced by Temperature and Host

Oliveira,

Pedrosa,

Leitão

et al. 2024

Journal of Nematology

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Infective second-stage juveniles (J2) of Meloidogyne spp. migrate towards host roots, which depends on several factors, including root exudates and soil temperature. Although Meloidogyne enterolobii is a highly virulent nematode that affects major agricultural crops worldwide, there is limited ecological data about it. The objective of this study was to determine the J2 migration pattern vertically in 14-cm long segmented soil columns towards tomato (Solanum lycopersicum) and marigold (Tagetes patula) roots, each grown at two soil temperatures (20 or 26ºC). Bottomless cups with tomatoes or marigolds were attached to the top of each column; cups with no plants were used as untreated controls. Juveniles (1,000/column) were injected into a hole located 1 cm from the bottom of each column. The apparatuses were placed in growth chambers at 20 or 26ºC, and J2 were allowed to migrate for 3, 6, 9, or 12 days after injection (DAI). At each harvest, J2 were extracted from each ring of the columns and counted to compare their distribution, and root systems were stained to observe root penetration. M. enterolobii migrated over 13 cm vertically 3 DAI regardless of temperature, even without plant stimuli. The vertical migration was greater at 26ºC, where 60% of active J2 were found at distances >13 cm at 12 DAI. Temperature did not affect root penetration. Overall, a greater number of J2 was observed in tomato roots, and root penetration increased over time.

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Section: Discussionmentioning

confidence: 99%

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confidence: 99%

Vertical Migration of Second-stage Juveniles of Meloidogyne enterolobii as Influenced by Temperature and Host

Oliveira,

Pedrosa,

Leitão

et al. 2024

Journal of Nematology

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“…Gene flow is one determinant of the spatial scale of the adaptation, because it defines the scale at which hosts diverge genetically (Gandon, 2002;Week & Bradburd, 2023). The scale of local adaptation could be quite small in our study system: juvenile Meloidogyne (J2s) migrate very limited distances within the soil, on the scale of centimeters (dos Santos Oliveira et al, 2020;Prot, 1976). However, the movement of nematodes by water, wind, or machinery could increase gene flow (Esquibet et al, 2019;Lehman, 1994;Plantard & Porte, 2004).…”

Section: Introductionmentioning

confidence: 99%

Do biological control agents adapt to local pest genotypes? A multiyear test across geographic scales

Gibson,

Mundim,

Ramirez

et al. 2024

Evolutionary Applications

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Parasite local adaptation has been a major focus of (co)evolutionary research on host–parasite interactions. Studies of wild host–parasite systems frequently find that parasites paired with local, sympatric host genotypes perform better than parasites paired with allopatric host genotypes. In contrast, there are few such tests in biological control systems to establish whether biological control parasites commonly perform better on sympatric pest genotypes. This knowledge gap prevents the optimal design of biological control programs: strong local adaptation could argue for the use of sympatric parasites to achieve consistent pest control. To address this gap, we tested for local adaptation of the biological control bacterium Pasteuria penetrans to the root‐knot nematode Meloidogyne arenaria, a global threat to a wide range of crops. We measured the probability and intensity of P. penetrans infection on sympatric and allopatric M. arenaria over the course of 4 years. Our design accounted for variation in adaptation across scales by conducting tests within and across fields, and we isolated the signature of parasite adaptation by comparing parasites collected over the course of the growing season. Our results are largely inconsistent with local adaptation of P. penetrans to M. arenaria: in 3 of 4 years, parasites performed similarly well in sympatric and allopatric combinations. In 1 year, however, infection probability was 28% higher for parasites paired with hosts from their sympatric plot, relative to parasites paired with hosts from other plots within the same field. These mixed results argue for population genetic data to characterize the scale of gene flow and genetic divergence in this system. Overall, our findings do not provide strong support for using P. penetrans from local fields to enhance biological control of Meloidogyne.

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Chemotaxis in Root-Knot Nematodes

Terra,

Lopes de Paula,

de Brum

et al. 2023

Root-Galling Disease of Vegetable Plants

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Migration and penetration of Meloidogyne enterolobii and M. incognita in soil columns with tomato and marigold

Cited by 6 publications

References 17 publications

Vertical Migration of Second-stage Juveniles of Meloidogyne enterolobii as Influenced by Temperature and Host

Vertical Migration of Second-stage Juveniles of Meloidogyne enterolobii as Influenced by Temperature and Host

Do biological control agents adapt to local pest genotypes? A multiyear test across geographic scales

Chemotaxis in Root-Knot Nematodes

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