Soil microorganisms control plant ectoparasitic nematodes in natural coastal foredunes

Piskiewicz, A.M.; Duyts, Henk; Berg, Matty P.; Costa, Sofia R.; Putten, Wim H. van der

doi:10.1007/s00442-007-0678-2

Cited by 36 publications

(35 citation statements)

References 46 publications

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“…Nematodes and soil microorganisms Specimen of T. ventralis were collected from the same coastal foredune area as plants and soil and cultured on the roots of A. arenaria plants in a greenhouse (Piśkiewicz et al 2007). One day before usage, the nematodes were extracted from the cultures by Cobb's decantation method (Oostenbrink 1960).…”

Section: Plantsmentioning

confidence: 99%

“…when added two or three weeks in advance (de la Peña et al 2006). The plant can control the cyst nematode Heterodera arenaria (van der Stoel et al 2006) and microbial enemies are a major factor in suppressing the ectoparasitic nematode Tylenchorhynchus ventralis (Piśkiewicz et al 2007). Thus far, in the studies mentioned above and other papers on root feeders, very little attention has been given to nematode behavior in relation to their natural enemies.…”

Section: Introductionmentioning

confidence: 99%

“…In a previous study, we have shown that microorganisms from the rhizosphere of the coastal foredune grass Ammophila arenaria (marram grass) are able to control the ectoparasitic root-feeding nematode T. ventralis (Order Tylenchida Pearse 1942; Genus Tylenchorhynchus Cobb; 1913 former name Telotylenchus ventralis Loof 1963 (Fortuner and Luc 1987) (Piśkiewicz et al 2007). These nematodes are key root herbivores in natural coastal foredunes.…”

Section: Introductionmentioning

confidence: 99%

“…These nematodes are key root herbivores in natural coastal foredunes. They are able to strongly decrease the biomass of A. arenaria (de Rooij van der Goes 1995a), if not controlled by their microbial enemies (Piśkiewicz et al 2007). In the field T. ventralis usually does not reach population levels that can affect plant growth (van der Stoel et al 2002), but numbers vary locally (de Rooij van der Goes et al 1995b).…”

Section: Introductionmentioning

confidence: 99%

“…Such avoidance would be of importance since the suppressive effects of microorganisms on T. ventralis are expressed locally (Piśkiewicz et al 2008). At least some microorganisms can attack the nematodes directly (Piśkiewicz et al 2007), although local induction of plant defenses cannot be excluded (Piśkiewicz et al 2008).…”

Section: Introductionmentioning

confidence: 99%

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Plant ectoparasitic nematodes prefer roots without their microbial enemies

et al. 2008

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Root-feeding nematodes are major soilborne pests in agriculture. In natural ecosystems, their abundance can be strongly controlled by natural enemies. In coastal foredune soil, the abundance of the ectoparasitic nematode Tylenchorhynchus ventralis is controlled by local interactions with soil microorganisms. If not controlled, T. ventralis reduces growth and performance of the host plant Ammophila arenaria. In the present study, we examine if the nematodes may sense the presence of soil microorganisms and, if so, they are able to actively avoid their enemies. First, using Petri dishes with agar medium we examined if T. ventralis can choose between A. arenaria seedlings inoculated with or without soil microorganisms. We observed that there was a trend (although non-significant) in nematode migration towards the non-inoculated plants. If the seedlings were not present, the nematodes did not make any choice and stayed in the centre of the Petri dish. Then, using Y-tubes filled with sterilized dune soil, we examined if T. ventralis could choose between A. arenaria roots with or without microorganisms. We also included treatments of microbial suspensions without plants and a microbe-free filtrate. We observed that the nematodes preferred roots without microorganisms. Microorganisms alone or roots with microbial filtrate did not influence nematode choice significantly. We conclude that the nematode T. ventralis is able to choose roots without soil microorganisms when having roots with them as alternative. Such avoidance could explain why biological control of nematodes in field is not always effective, especially when microbial antagonists accumulate in specific parts of the rhizosphere.

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Section: Plantsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Plant ectoparasitic nematodes prefer roots without their microbial enemies

et al. 2008

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Nematode community responses to range‐expanding and native plant communities in original and new range soils

Wilschut

Kostenko

Koorem

et al. 2018

Ecology and Evolution

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Many plant species expand their range to higher latitudes in response to climate change. However, it is poorly understood how biotic interactions in the new range differ from interactions in the original range. Here, in a mesocosm experiment, we analyze nematode community responses in original and new range soils to plant communities with either (a) species native in both the original and new range, (b) range‐expanding species related to these natives (related range expanders), or (c) range expanders without native congeneric species in the new range (unrelated range expanders). We hypothesized that nematode community shifts between ranges are strongest for unrelated range expanders and minimal for plant species that are native in both ranges. As a part of these community shifts, we hypothesized that range expanders, but not natives, would accumulate fewer root‐feeding nematodes in their new range compared to their original range. Analyses of responses of nematodes from both original and new ranges and comparison between range expanders with and without close relatives have not been made before. Our study reveals that none of the plant communities experienced evident nematode community shifts between the original and new range. However, in soils from the new range, root‐feeding nematode communities of natives and related range expanders were more similar than in soils from the original range, whereas the nematode community of unrelated range expanders was distinct from the communities of natives and related range expanders in soils from both ranges. The abundances of root‐feeding nematodes were comparable between the original and new range for all plant communities. Unexpectedly, unrelated range expanders overall accumulated most root‐feeding nematodes, whereas related range expanders accumulated fewest. We conclude that nematode communities associated with native and range‐expanding plant species differ between the original and the new range, but that range‐expanding plant species do not accumulate fewer root‐feeding nematodes in their new than in their original range.

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