Morphological variability in second-stage juveniles and males of Meloidogyne chitwoodi

Humphreys-Pereira, Danny A.; Elling, Axel A.

doi:10.1163/15685411-00002753

Cited by 5 publications

(1 citation statement)

References 31 publications

(23 reference statements)

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“…These differences we believed to be caused by intraspecies variations are also observed among other populations. In a study, which evaluated the morphological features of male and the second stage larvae belonging to four different American isolate of M. chitwoodi, very high morphological variation was reported (Humphreys-Pereira & Elling, 2014). Karssen (2002) reported that rectum inflated, whereas Golden et al (1980) reported rectum not inflated.…”

Section: Morphological Identificationmentioning

confidence: 99%

Identification of root-knot nematode species (Meloidogyne spp.) (Nemata: Meloidogynidae) in the potato fields of Central Anatolia (Turkey) using molecular and morphological methods

Evlice¹,

Bayram²

2016

Türkiye Entomoloji Bülteni

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Identification of root-knot nematode species (Meloidogyne spp.) (Nemata: Meloidogynidae) in the potato fields of Central Anatolia (Turkey) using molecular and morphological methods 1 Orta Anadolu Bölgesi (Türkiye) patates ekiliş alanlarındaki kök-ur nematodu türlerinin (Meloidogyne spp.) (Nemata: Meloidogynidae) moleküler ve morfolojik yöntemlerle belirlenmesi Emre EVLİCE 2 Şerife BAYRAM 3 Summary Root-knot nematodes are considered to be the world's most damaging plant parasitic nematodes. Meloidogyne chitwoodi and Meloidogyne fallax are quarantined organisms in Europe and Turkey, and special regulations exist for planting and transporting seed potatoes in order to control these organisms. M. chitwoodi, was firstly identified from infected potato tubers collected from Niğde and after that it was determined in Nevşehir, İzmir, Balıkesir, Kütahya, Manisa and Bitlis provinces in Turkey. This study was conducted in 2009 with the aim of identifying Meloidogyne spp. species in Central Anatolia, which is the most important potato production region of Turkey. 73 samples in total were collected from Niğde (49 samples), Nevşehir (18), Aksaray (2), Isparta (2), Kayseri (1), and Konya (1) provinces of Turkey. All populations were identified using molecular methods, also fifteen selected populations were identified based on their morphological and morphometric features. Morphological characters and morphometric measurements were taken from the perineal pattern of mature females, second-stage juveniles, and eggs. Two different PCR protocols were used: (1) JMV1, JMV2 and JMV hapla multiplex PCR primers and (2) Fc and Rc species specific primers. Also sequence analysis was used for molecular identification. Results obtained both from morphological and molecular methods showed that all populations were positive for M. chitwoodi and there is no evidence was found regarding the existence of M. fallax or the other Meloidogyne species.

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Section: Morphological Identificationmentioning

confidence: 99%

Identification of root-knot nematode species (Meloidogyne spp.) (Nemata: Meloidogynidae) in the potato fields of Central Anatolia (Turkey) using molecular and morphological methods

Evlice¹,

Bayram²

2016

Türkiye Entomoloji Bülteni

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RNA Interference of Effector GeneMc16D10LConfers Resistance AgainstMeloidogyne chitwoodiinArabidopsisand Potato

Dinh¹,

Brown²,

Elling³

2014

Phytopathology®

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Meloidogyne chitwoodi, a quarantine pathogen, is a significant problem in potato-producing areas worldwide. In spite of considerable genetic diversity in wild potato species, no commercial potato cultivars with resistance to M. chitwoodi are available. Nematode effector genes are essential for the molecular interactions between root-knot nematodes and their hosts. Stable transgenic lines of Arabidopsis and potato (Solanum tuberosum) with resistance against M. chitwoodi were developed. RNA interference (RNAi) construct pART27(16D10i-2) was introduced into Arabidopsis thaliana and potato to express double-stranded RNA complementary to the putative M. chitwoodi effector gene Mc16D10L. Plant-mediated RNAi led to a significant level of resistance against M. chitwoodi in Arabidopsis and potato. In transgenic Arabidopsis lines, the number of M. chitwoodi egg masses and eggs was reduced by up to 57 and 67% compared with empty vector controls, respectively. Similarly, in stable transgenic lines of potato, the number of M. chitwoodi egg masses and eggs was reduced by up to 71 and 63% compared with empty vector controls, respectively. The relative transcript level of Mc16D10L was reduced by up to 76% in M. chitwoodi eggs and infective second-stage juveniles that developed on transgenic pART27(16D10i-2) potato, suggesting that the RNAi effect is systemic and heritable in M. chitwoodi.

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Nondestructive Imaging of Plant-Parasitic Nematode Development and Host Response to Nematode Pathogenesis

Dinh¹,

Knoblauch²,

Elling³

2014

Phytopathology®

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The secluded lifestyle of endoparasitic plant nematodes hampers progress toward a comprehensive understanding of plant-nematode interactions. A novel technique that enables nondestructive, long-term observations of a wide range of live nematodes in planta is presented here. As proof of principle, Pratylenchus penetrans, Heterodera schachtii, and Meloidogyne chitwoodi were labeled fluorescently with PKH26 and used to infect Arabidopsis thaliana grown in microscopy rhizosphere chambers. Nematode behavior, development, and morphology were observed for the full duration of each parasite's life cycle by confocal microscopy for up to 27 days after inoculation. PKH26 accumulated in intestinal lipid droplets and had no negative effect on nematode infectivity. This technique enabled visualization of Meloidogyne gall formation, nematode oogenesis, and nematode morphological features, such as the metacorpus, vulva, spicules, and cuticle. Additionally, microscopy rhizosphere chambers were used to characterize plant organelle dynamics during M. chitwoodi infection. Peroxisome abundance strongly increased in early giant cells but showed a marked decrease at later stages of feeding site development, which suggests a modulation of plant peroxisomes by root-knot nematodes during the infection process. Taken together, this technique facilitates studies aimed at deciphering plant-nematode interactions at the cellular and subcellular level and enables unprecedented insights into nematode behavior in planta.

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Morphological variability in second-stage juveniles and males of Meloidogyne chitwoodi

Cited by 5 publications

References 31 publications

Identification of root-knot nematode species (Meloidogyne spp.) (Nemata: Meloidogynidae) in the potato fields of Central Anatolia (Turkey) using molecular and morphological methods

Identification of root-knot nematode species (Meloidogyne spp.) (Nemata: Meloidogynidae) in the potato fields of Central Anatolia (Turkey) using molecular and morphological methods

RNA Interference of Effector GeneMc16D10LConfers Resistance AgainstMeloidogyne chitwoodiinArabidopsisand Potato

Nondestructive Imaging of Plant-Parasitic Nematode Development and Host Response to Nematode Pathogenesis

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