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Dissertations / Theses on the topic 'Nematodes - Classification'

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1

Duong, Duc Hieu, Thi Thu Nga Bui, Thi Diem Thuy Tran, Thi Minh Phuong Nguyen, Huu Hung Nguyen, and Vu Thanh Nguyen. "Analysing the characteristics of soil nematode communities at pepper (Piper nigrum L.) cultivation area in Loc Hung commune, Loc Ninh district, Binh Phuoc province." Saechsische Landesbibliothek- Staats- und Universitaetsbibliothek Dresden, 2012. http://nbn-resolving.de/urn:nbn:de:bsz:14-qucosa-99484.

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Pepper (Piper nigrum L.) is a high economic value plant species that brings the main income to the people at Loc Hung commune. So the pepper’s yield plays a significant role in people’s life in this region. To assess the influence of environmental factors on the growth and development of pepper, we need to analyse the structural characteristics of soil nematode communities in order to promptly detect the levels of parasitic nematodes infection as well as assessment of soil environment status based on nematode communities. Study results at five sampling stations are analyses of 30 genera of nem
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2

Kamitani, Fernando Luiz. "Caracterização molecular de isolados de nematóides entomopatogênicos, Heterorhabditis spp. e seus simbiontes, Photorhabdus spp., provenientes de Monte Negro, RO." Universidade de São Paulo, 2010. http://www.teses.usp.br/teses/disponiveis/42/42135/tde-18102010-082658/.

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Os isolados de nematóides entomopatogênicos provenientes do solo de Monte Negro (RO) receberam o prefixo LPP seguido de um número sequencial. As linhagens de bactérias simbiontes receberam o prefixo MN como referência ao local de isolamento. As culturas dos isolados de nematóides entomopatogênicos LPP foram estabelecidas em nosso laboratório, sendo necessário cultivar também o lepidóptero Galleria mellonella para as infeções visando manter os nematóides em cultura. Os isolados, tanto de nematóides como das bactérias, foram identificados através do sequenciamento de genes ribossômicos (ITS 1 e
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3

Duong, Duc Hieu, Xuan Quang Ngo, Dang Giap Do, Thi Anh Hong Le, Vu Thanh Nguyen, and Nic Smol. "Effective control of neem (Azadirachta indica A. Juss) cake to plant parasitic nematodes and fungi in black pepper diseases in vitro: Research article." Technische Universität Dresden, 2014. https://tud.qucosa.de/id/qucosa%3A29103.

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Neem cake is a product of the cold pressing from the neem kernels to obtain neem oil. Bio-active substances from neem cake extracted solutions were evaluated for their potential to control the root knot nematodes and other pests of plants. In this study different concentrations of the solution extracted from neem cake was tested against the second stage juveniles of the plant parasitic nematode Meloidogyne spp. and four phytopathogenic fungi: Rhizoctonia solani, Sclerotium rolfsii, Collectotrichum spp. and Phytopthora capsici. Toxicity of neem cake extractions is represented by the EC50 value
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4

Doshi, Rushabh Ashok. "SELF-ORGANIZING MAPS FOR CLASSIFICATION AND PREDICTION OF NEMATODE POPULATIONS IN COTTON." MSSTATE, 2007. http://sun.library.msstate.edu/ETD-db/theses/available/etd-03312007-104040/.

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In this work, different Rotylenchulus reniformis nematode population numbers affecting cotton plants were spectrally classified using Self-Organized Maps. The hyperspectral reflectance of cotton plants affected by different nematode population numbers were analyzed in order to extract information from the signal that would lead to a fieldworthy methodology for predicting nematode population numbers extant in a plant's rhizosphere. Hyperspectral reflectances from both control and field nematode infestations were used in this work. Various feature extraction and dimensionality reduction methods
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5

Scheibel, Raymond Philip. "THE SYSTEMATICS OF MARSUPIAL PARASITES IN VIANNAIIDAE (NEMATODA): A NEW SPECIES AND A RECONSTRUCTION OF CHARACTERS USEFUL IN THEIR CLASSIFICATION." OpenSIUC, 2013. https://opensiuc.lib.siu.edu/theses/1156.

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One of the most diverse groups of parasitic nematodes includes the nematodes of the suborder Trichostrongylina. Trichostrongyle systematic classification is based on the study of the anterior end, the female reproductive system, the male copulatory bursa and cuticular ridges, which make up the synlophe. These morphological characters also assist taxonomists to characterize species and assign them into one of the three superfamilies. Heligmosomoidea is the most diverse superfamily, including Viannaiidae. This family represents one of the major evolutionary radiations of trichostrongyles in Sout
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6

Aung, Swe. "Biodiversity, systematics and ecology of nematode-trapping fungi from Hong Kong." Thesis, Click to view the E-thesis via HKUTO, 2009. http://sunzi.lib.hku.hk/hkuto/record/B41634214.

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7

Hille, Gildo. "Untersuchungen zum Endoparasitenbefall des Muffelwildes in Thüringen." Doctoral thesis, Universitätsbibliothek Leipzig, 2004. http://nbn-resolving.de/urn:nbn:de:bsz:15-qucosa-33655.

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Es wurden die Aufbrüche von 104 Mufflons aus insgesamt 9 Herkunftsgebieten in Thüringen parasitologisch untersucht. Im Enddarmkot aller Tiere waren Parasitenentwicklungsstadien nachweisbar. Bei der parasitologischen Sektion der Aufbrüche wurden insgesamt 32 Nematodenarten (27 Arten im Magen-Darm-Kanal sowie 5 Arten in der Lunge), 2 Zestodenarten und eine Trematodenart in der Leber nachgewiesen. Es traten dabei Mischinfektionen mit bis zu 15 Nematodenarten im Gastrointestinaltrakt bzw. mit bis zu 3 Nematodenarten in der Lunge der Mufflons auf. Alle Tiere waren mit Magen-Darm-Nematoden befallen,
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8

Nguyen, Dang Minh Chanh, and Woo Jin Jung. "Nematicidal properties of crude extracts obtained from medicinal plants against rootlesion nematode Pratylenchus coffeae: Research article." Technische Universität Dresden, 2014. https://tud.qucosa.de/id/qucosa%3A29108.

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To investigate nematicidal activity against the root-lesion nematode, Pratylenchus coffeae, the methanolic extracts were obtained from 5 medicinal plants in Vietnam. Methanol extracts of the 5 samples were screened for nematicidal activity against Pratylenchus coffeae in vitro. Of the plant extracts tested, a 5 mg/ml concentration of Terminalia nigrovenulosa extract showed the highest level (95.0%) of nematicidal activity against Pratylenchus coffeae at 9 h after treatment. The remainder of the plant extracts was followed by Cinnamomum camphora (66.7%), Jasminum suptriplinerve (30.8%), Premna
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9

Ngo, Xuan Quang, Ngoc Chau Nguyen, Dinh Tu Nguyen, Van Lam Pham, and Ann Vanreusel. "Distribution pattern of free living nematode communities in the eight Mekong estuaries by seasonal factor." Saechsische Landesbibliothek- Staats- und Universitaetsbibliothek Dresden, 2013. http://nbn-resolving.de/urn:nbn:de:bsz:14-qucosa-126834.

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The temporal variation of nematode communities in eight mouth stations of the Mekong River system was investigated in order to compare the change between the dry and the wet season. The nematode data was analysed by multivariate techniques such as SIMPROF, MDS, ANOSIM and SIMPER in the software PRIMER v.6 – PERMANOVA. Our results showed that average dissimi-larity between seasons of the nematode communities in each station was high. Seasonal factor did not affect strongly their distribution pattern. Dominant genera Desmodora and Oncholaimellus usually occurred in the sand stations and Parodont
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10

Nguyen, Thi Phuong, Duy Ngo Ha, Huu Hung Nguyen та Duc Hieu Duong. "Application of PCR-DGGE method for identification of nematode communities in pepper growing soil: Ứng dụng phương pháp PCR-DGGE để định danh cộng đồng tuyến trùng trong đất trồng hồ tiêu". Technische Universität Dresden, 2016. https://tud.qucosa.de/id/qucosa%3A30452.

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Soil nematodes play an important role in indication for assessing soil environments and ecosystems. Previous studies of nematode community analyses based on molecular identification have shown to be useful for assessing soil environments. Here we applied PCR-DGGE method for molecular analysis of five soil nematode communities (designed as S1 to S5) collected from four provinces in Southeastern Vietnam (Binh Duong, Ba Ria Vung Tau, Binh Phuoc and Dong Nai) based on SSU gene. By sequencing DNA bands derived from S5 community sample, our data show 15 species containing soil nematode, other nemato
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11

Duong, Duc Hieu, Thi Phuong Anh Le, Thi Thu Nga Bui, et al. "Nematode communities act as bio-indicator of status and processes of an agricultural soil ecosystem in Thanh An, Binh Phuoc province: Research article." Technische Universität Dresden, 2014. https://tud.qucosa.de/id/qucosa%3A29102.

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Nematode communities in black pepper (Piper nigrum L.) agricultural soil in Thanh An, Binh Phuoc province, were investigated. Soil samples were collected in February 2012 at 9 selected sites belonging to 3 pepper groves. The structure of nematode communities and critical ecological indices were determined to estimate environmental status. 26 genera were found. Of those, plant parasitic nematodes such as Meloidogyne, Helicotylenchus, Hoplolaimus, Psilenchus, and Tylenchidae always appear with high frequency and density, whereas the carnivorous nematodes were rarely detected. The nematode densit
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12

"Taksonomiese studies van Suid-Afrikaanse nematode van die families Trichodoridae en Xiphinemidae." Thesis, 2015. http://hdl.handle.net/10210/15031.

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13

Missal, Kristin, Xiaopeng Zhu, Dominic Rose, Wei Deng, Geir Skogerbø, and Runsheng Chen. "Prediction of structured non-coding RNAs in the genomes of the nematodes Caenorhabditis elegans and Caenorhabditis briggsae." 2006. https://ul.qucosa.de/id/qucosa%3A32022.

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We present a survey for non‐coding RNAs and other structured RNA motifs in the genomes of Caenorhabditis elegans and Caenorhabditis briggsae using the RNAz program. This approach explicitly evaluates comparative sequence information to detect stabilizing selection acting on RNA secondary structure. We detect 3,672 structured RNA motifs, of which only 678 are known non‐translated RNAs (ncRNAs) or clear homologs of known C. elegans ncRNAs. Most of these signals are located in introns or at a distance from known protein‐coding genes. With an estimated false positive rate of about 50% and a sensi
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14

Huang, Yin-yen, and 黃盈彥. "The Distribution and Classification of Pine wood nematode (Bursaphelenchus spp.) in Taiwan." Thesis, 2005. http://ndltd.ncl.edu.tw/handle/35537037095081142685.

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碩士<br>國立中興大學<br>植物病理學系<br>93<br>Bursaphelenchus xylophilus causes the pine wilt disease (PWD). The resistant plant Pinus massoniana and P. taiwenensis tend to be infected PWD recently. The objective of this study is to investigate the distribution of pine wilt disease and to understand the association between morphology variation and parasitism diversity of Bursaphelenchus spp. in Taiwan. We collected 19 isolates that were divided into 5 groups by morphology characteristics and the ITS region database. Some isolates were considered as B. mucronatus or B.thailandae that haven’t found yet in Tai
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15

Szczepaniak, Krzysztof. "Developmental roles of DDX3 helicase LAF-1." 2019. https://tud.qucosa.de/id/qucosa%3A74063.

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Germ cells are a pool of cells that serve as a link between generations. These cells are separated from the somatic cells by specialized type of cytoplasm, called the germ plasm. Germ plasm contains, membraneless, electron dense subcellular structures, termed germplasm granules that contain numerous components of mRNA metabolism pathway. One of the most prominent protein families, commonly found in germplasm granules are DEAD-box helicases. While this protein family is currently heavily investigated, surprisingly little is known about their functions in germ plasm granules and the mechanisms o
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16

Kuhnert-Paul, Yvonne. "Studien zur Eignung labordiagnostischer Verfahren zum Nachweis von Protozoen und Nematoden bei verschiedenen Säugetierarten: Studien zur Eignung labordiagnostischer Verfahren zum Nachweis von Protozoen und Nematoden bei verschiedenen Säugetierarten." Doctoral thesis, 2012. https://ul.qucosa.de/id/qucosa%3A11978.

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In den vorliegenden Studien wurden verschiedene diagnostische Verfahren zum Nachweis von Protozoen und Nematoden im Hinblick auf Sensitivität, Arbeitsaufwand und Kosten miteinander verglichen. Zudem wurde die Eignung der PCR zur molekularen Charakterisierung der Cryptosporidium spp. exemplarisch an Igelkotproben getestet. Bei der Untersuchung von 90 Ferkelkotproben auf I. suis war die Sensitivität eines Kotausstriches mit nachfolgender Autofluoreszenzmikroskopie (AM) signifikant höher als bei einem Flotationsverfahren (FV) mit NaCl-Zucker-Lösung und bei dem kombinierten Sedimentations-Flotati
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