Bermudagrass Cultivar Responses to Sting Nematodes

Pang, Wenjing; Luc, John E.; Crow, William T.; Kenworthy, Kevin E.; Giblin-Davis, Robin M.; McSorley, Robert; Kruse, Jason

doi:10.2135/cropsci2011.01.0013

Cited by 12 publications

(18 citation statements)

References 9 publications

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“…The tolerant line (AB39) had both low levels of root biomass loss and low nematode populations. These results are line with previous observation from accession screens 23,24 . www.nature.com/scientificreports www.nature.com/scientificreports/ Host metabolome modification by sting nematodes.…”

Section: Discussionsupporting

confidence: 93%

“…To investigate whether sting nematodes modify metabolite production in their host plants, mixed age Belonolaimus longicaudatus nematodes were introduced to the root zones of three African bermudagrass (Cynodon transvaalensis) lines of differing tolerance: one susceptible line (AB03), one moderately tolerant line (AB33), and one tolerant line (AB39). Tolerance in these bermudagrass lines had been determined in previous work; lines are considered tolerant if there was no reduction in root length or had greater root length than the 'Tifway' cultivar despite B. longicaudatus infection 23,24 . In our work, comparison control plants received no nematodes.…”

Section: Resultsmentioning

confidence: 99%

“…To explore the extent to which ectoparasitic nematodes can modify host plant metabolomes, we used the sting nematode (Belonolaimus longicaudatus Rau) on African bermudagrass (Cynodon transvaalensis Burtt-Davy) as a model system. B. longicaudatus affects a variety of agricultural crops, including peanuts and cotton 19,20 , and is a primary and devastating pathogen of turfgrass 21,22 where it leads to reduced drought tolerance, environmental concerns due to leaching, and, in combination with other stresses, plant death 23 . Effective and environmentally friendly control methods for working with this pathogen have focused on screening and development of tolerant (able to withstand, but not prevent, nematode feeding) bermudagrass cultivars 23,24 , but mechanisms of tolerance are not understood.…”

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Sting nematodes modify metabolomic profiles of host plants

Willett

Filgueiras

Benda

et al. 2020

Sci Rep

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Plant-parasitic nematodes are devastating pathogens of many important agricultural crops. They have been successful in large part due to their ability to modify host plant metabolomes to their benefit. Both root-knot and cyst nematodes are endoparasites that have co-evolved to modify host plants to create sophisticated feeding cells and suppress plant defenses. In contrast, the ability of migratory ectoparasitic nematodes to modify host plants is unknown. Based on global metabolomic profiling of sting nematodes in African bermudagrass, ectoparasites can modify the global metabolome of host plants. Specifically, sting nematodes suppress amino acids in susceptible cultivars. Upregulation of compounds linked to plant defense have negative impacts on sting nematode population densities. Pipecolic acid, linked to systemic acquired resistance induction, seems to play a large role in protecting tolerant cultivars from sting nematode feeding and could be targeted in breeding programs. Nematodes are ubiquitous denizens of belowground environments. While many are free-living, the more than 4000 plant-parasitic nematodes are devastating in their impacts on human agriculture 1,2. Most important agricultural crops suffer yield suppression from plant-parasitic nematodes with annual economic damage estimates exceeding $100 billion 1,3. This devastation is due in part to the success of plant-parasitic nematodes as pathogens in overcoming plant defenses. Indeed, the manner in which plant-parasitic nematodes overcome plant defenses makes them a model system for understanding basic plant biology and mechanisms of resistance 3,4. Plant defenses against plant-parasitic nematodes are complex and diverse ranging from toxic root exudates to effector triggered immunity and specific gene-mediated resistance 3,5. These plant defense strategies have co-evolved in an elaborate arms-race alongside attempts of plant-parasitic nematodes at overcoming plant defenses 3,6,7. Perhaps the best studied of examples of this dynamic interplay are those of obligate endoparasitic nematodes such as the root-knot nematode (Meloidogyne spp.) and the soybean cyst nematode (Heterodera glycines). These nematodes are sophisticated in their ability to overcome and manipulate the defenses of their host plants. Both root-knot and cyst nematodes will secrete a variety of effectors (primarily proteins) that actively suppress both pattern and effector triggered immunity in host plants 8-11. Additionally, both types of endoparasitic nematodes modify host plant gene expression to their advantage 12. Root-knot nematodes establish feeding sites by inducing plants to produce giant feeding cells, multinucleate, hypertrophied cells. Cyst nematodes similarly manipulate plants to create multinucleate feeding sites called syncytia. In contrast to root-knot nematode giant cells formed through multiple mitotic cycles, cyst nematode syncytia are formed through cell wall dissolution. In both cases, these feeding cells are marvels of co-evolutionary engineering as the nematode is ab...

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Section: Discussionsupporting

confidence: 93%

Section: Resultsmentioning

confidence: 99%

mentioning

confidence: 99%

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Sting nematodes modify metabolomic profiles of host plants

Willett

Filgueiras

Benda

et al. 2020

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“…However, there are no bermudagrass cultivars with documented resistance against plant‐parasitic nematodes. ‘Tifway’, ‘Celebration’, ‘Princess 77’, and ‘TifSport’ are some cultivars that have been reported as tolerant toward sting nematode (Giblin‐Davis et al, 1992; Pang et al, 2011a, 2011b). Tifway bermudagrass is the most commonly used bermudagrass on golf courses, athletic fields, and lawns in the United States.…”

Section: Useful Conversionsmentioning

confidence: 99%

“…Tifway bermudagrass is the most commonly used bermudagrass on golf courses, athletic fields, and lawns in the United States. Tifway was reported as tolerant toward sting nematode among genotypes available in the late 1980s (Giblin‐Davis et al, 1992), but was found to be less tolerant than many genotypes available two decades later (Pang et al, 2011a, 2011b).…”

Section: Useful Conversionsmentioning

confidence: 99%

Integrated Pest Management of Nematodes on Bermudagrass Turf

Aryal

Crow

McSorley

et al. 2016

Crop Forage & Turfgrass Mgmt

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Use of bermudagrass (Cynodon dactylon) cultivars resistant/ tolerant to plant-parasitic nematodes is an important component of integrated pest management (IPM) for sustainable turf nematode management in sandy coastal soils of the southeastern United States. A multiyear field experiment evaluated five bermudagrass genotypes ('Tifway', standard susceptible; two commercial cultivars, 'TifSport' and 'Celebration'; and two experimental germplasm, BA132 and PI 291590, that were identified as tolerant to sting nematode [Belonolaimus longicaudatus]) and four different nematicide regimes (untreated control, Curfew Soil Fumigant [1,3-dichloropropene], monitoring-based IPM [action threshold nematicide program], and calendar-based IPM [nematicide rotation]). Nematode samples were collected at 3-month intervals from February 2012 to November 2014. No significant differences among the genotypes with regard to population density of sting nematode were documented, but there were differences among genotypes with regard to some of the other plant-parasitic nematodes, particularly spiral (Helicotylenchus paxilli) and ring (Mesocriconema ornatum) nematodes. There were significant nematicide regime responses on nematode population level after August 2013. A calendar-based IPM program rotating Nortica (Bacillus firmus strain I-1582), Multiguard Protect (furfural), MustGrow Invest (Brassica juncea), and Avid (abamectin) significantly reduced the nematode population density compared with a monitoring-based IPM program and the standard soil fumigant nematicide Curfew. In the untreated control, nematode population densities were significantly higher than in the other treatments. Celebration and PI 291590 bermudagrass genotypes had better percent green cover throughout the study. B ermudagrass (Cynodon spp.) is the most popular perennial warm-season turf used as ground cover on lawns, parks, golf courses, sports fields, forage grazing, soil conservation, and general utility turf in the southeastern United States (Taliaferro, 1995;Trenholm and Unruh, 2005). In the state of Florida, where >80% of total golf courses sampled were infested with plant-parasitic nematodes at potentially damaging levels (Crow, 2005). Nematode parasites that can damage bermudagrass include: sting nematode (Belonolaimus longicaudatus), stubby-root nematodes (Trichodorus and Nanidorus Published in Crop Forage Turfgrass Manage.

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‘Newell’ bermudagrass: A public release from the USDA Cynodon collection

Rios,

Lopez,

Munoz

et al. 2023

J of Plant Registrations

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Warm‐season perennial grasses are the backbone of the pasture‐based livestock industry in the lower southeastern United States, and bermudagrass (Cynodon spp.) is the most widely planted forage species, covering ∼15 million ha. The genus Cynodon is native to southern Africa, and germplasm collections possess high genetic and phenotypic variability. The USDA National Plant Germplasm System maintains a collection of bermudagrass plant introductions (PIs) in Griffin, GA, and USDA‐ARS, Tifton, GA, maintains additional germplasm. Multi‐location trials were established in four states (Florida, Georgia, North Carolina, and Oklahoma) to screen Cynodon germplasm for herbage accumulation (HA), nutritive value (NV), and bermudagrass stem maggot (BSM) (Atherigona reversura Villeneuve). Due to the large genotype × environment interaction for HA, we focused on selecting accessions adapted to South Georgia and Florida, and further studies were performed in Florida. Several PIs showed improved HA and NV compared with ‘Tifton 85’. PI 316510, originally introduced from Ingelheim, Germany, produced high HA in Citra, FL, and Tifton, GA, with improved NV traits. In addition, PI 316510 had faster establishment and similar BSM tolerance to Tifton 85. We confirmed PI 316510 as tetraploid (2n = 4x = 36) through chromosome counts and flow cytometry, and it is genetically distinct from other commercial cultivars. PI 316510 has been publicly released under the name ‘Newell’, and it is vegetatively propagated. Planting material can be requested from the UF‐IFAS Forage Breeding program.

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Bermudagrass Cultivar Responses to Sting Nematodes

Cited by 12 publications

References 9 publications

Sting nematodes modify metabolomic profiles of host plants

Sting nematodes modify metabolomic profiles of host plants

Integrated Pest Management of Nematodes on Bermudagrass Turf

‘Newell’ bermudagrass: A public release from the USDA Cynodon collection

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