Nematology最新文献_第10页

Comparison of transmission of Bursaphelenchus mucronatus via two different pathways from Monochamus saltuarius to host trees 短突短柱线虫通过两种不同途径从盐木麻黄传播到寄主树的比较

IF 1.2 4区生物学

Nematology Pub Date : 2023-05-04 DOI: 10.1163/15685411-bja10244

Yusuke Nakayama, K. Togashi

{"title":"Comparison of transmission of Bursaphelenchus mucronatus via two different pathways from Monochamus saltuarius to host trees","authors":"Yusuke Nakayama, K. Togashi","doi":"10.1163/15685411-bja10244","DOIUrl":"https://doi.org/10.1163/15685411-bja10244","url":null,"abstract":"\u0000Bursaphelenchus xylophilus, the causative agent of pine wilt disease, and B. mucronatus are transmitted by Monochamus adults to host trees. Feeding and oviposition wounds made by vectors are the primary transmission pathways to trees. Monochamus saltuarius female adults carrying B. mucronatus were reared singly and allowed to mate with nematode-free males at 5-day intervals, to determine the ratio of nematodes transmitted via the two different pathways. The survival time, lifetime fecundity and other reproductive traits decreased with increasing initial nematode load (number of nematodes carried by a newly-emerged adult). Model selection indicated that numbers of B. mucronatus departing from M. saltuarius and of those transmitted to pine via oviposition and feeding wounds were closely related to the initial nematode load, which was affected by survival time and number of oviposition wounds constructed. Most temporal patterns of nematode departure and transmission via oviposition or feeding wounds from individual vectors had a peak in the medium and heavy initial nematode loads. The nematode departure curve was significantly similar in shape to each of the nematode transmission curves via oviposition and feeding wounds, which were not significantly similar to each other, for individual vectors. After M. saltuarius females began to construct the oviposition wounds, it was estimated that B. mucronatus was transmitted via the oviposition wounds at a probability of 0.767. If B. xylophilus is transmitted in the same way as B. mucronatus, the incidence of pine wilt disease by mature vectors would be much lower than in the case of no oviposition-related transmission.","PeriodicalId":18928,"journal":{"name":"Nematology","volume":null,"pages":null},"PeriodicalIF":1.2,"publicationDate":"2023-05-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"41730259","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 1

Characterisation of an endospore population of Pasteuria that adheres to the plant-parasitic nematode Heterodera schachtii 附着于植物寄生线虫沙氏异源线虫的巴氏菌孢子内种群的特征

IF 1.2 4区生物学

Nematology Pub Date : 2023-05-04 DOI: 10.1163/15685411-bja10248

Ramona Hirschfield, S. Mohan, K. Davies

{"title":"Characterisation of an endospore population of Pasteuria that adheres to the plant-parasitic nematode Heterodera schachtii","authors":"Ramona Hirschfield, S. Mohan, K. Davies","doi":"10.1163/15685411-bja10248","DOIUrl":"https://doi.org/10.1163/15685411-bja10248","url":null,"abstract":"\u0000Selected strains of Pasteuria species from the endospore-forming Gram-positive bacteria group have the potential to be developed into control agents for plant-parasitic nematodes. If Pasteuria is to be deployed successfully as a control agent, endospores of the bacterium initially have to adhere to the cuticle of the infective juvenile. Studies of the bacteria isolated from root-knot nematodes have suggested that collagen-like fibres on the endospore surface interact with a cuticle receptor on the second-stage juvenile through a host specific ‘Velcro-like’ mechanism. However, very little is known regarding the biochemical nature of the mechanism in Pasteuria strains isolated from cyst nematodes. Here, using several polyclonal antibodies raised to whole endospores and to synthetic collagen-like peptides, we compare two Pasteuria populations, one a strain from a root-knot nematode, Meloidogyne javanica, and another from cowpea cyst nematode, Heterodera cajani. We demonstrate that there is differential adhesion of endospores to the beet cyst nematode H. schachtii and that the sugar moieties on the endospore surface may protect the collagen-like fibres on the endospore from proteolytic digestion and be involved in the endospore’s specificity.","PeriodicalId":18928,"journal":{"name":"Nematology","volume":null,"pages":null},"PeriodicalIF":1.2,"publicationDate":"2023-05-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"46524219","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Persistence of the entomopathogenic nematode Steinernema carpocapsae on red palm weevil-infested date palm trees in an arid environment 干旱环境中红棕象甲侵染的枣椰树上昆虫病原线虫的持久性

IF 1.2 4区生物学

Nematology Pub Date : 2023-05-03 DOI: 10.1163/15685411-bja10246

Gal Yaacobi, Llora Salame, I. Glazer

引用次数: 1

Devibursaphelenchus wangi (Nematoda: Ektaphelenchinae) detected in Loblolly pine logs from the USA with morphological and molecular differences 在美国火炬松原木中检出的wangi线虫(线虫纲:Ektaphelenchinae)及其形态和分子差异

IF 1.2 4区生物学

Nematology Pub Date : 2023-04-13 DOI: 10.1163/15685411-bja10243

J. Gu, Xinxin Ma, Yiwu Fang

引用次数: 0

Susceptibility of seven strawberry cultivars to Belonolaimus longicaudatus and interaction with Phytophthora cactorum 7个草莓品种对长尾贝洛菌的敏感性及与仙人掌疫霉的相互作用

IF 1.2 4区生物学

Nematology Pub Date : 2023-04-13 DOI: 10.1163/15685411-bja10237

Clemen J. Oliveira, E. van Santen, M. Marin, L. Schumacher, N. Peres, J. Desaeger

{"title":"Susceptibility of seven strawberry cultivars to Belonolaimus longicaudatus and interaction with Phytophthora cactorum","authors":"Clemen J. Oliveira, E. van Santen, M. Marin, L. Schumacher, N. Peres, J. Desaeger","doi":"10.1163/15685411-bja10237","DOIUrl":"https://doi.org/10.1163/15685411-bja10237","url":null,"abstract":"\u0000Belonolaimus longicaudatus and Phytophthora cactorum are pathogens threatening Florida strawberry production. The interaction among these and cultivar susceptibility were assessed in this study. Cultivars ‘Sensation® Florida127’, ‘Florida Brilliance’, ‘Florida Radiance’, ‘Winterstar™ FL 05-107’, ‘Florida Elyana’, ‘Strawberry Festival’ and ‘Florida Beauty’ were used to conduct one trial using plug transplants and a second trial using bare-root transplants, which was repeated twice. A factorial combination of P. cactorum (+/−) and B. longicaudatus (+/−) inoculation was applied to evaluate strawberry cultivar resistance to P. cactorum and B. longicaudatus as well as their interaction. The effect of P. cactorum on the canopy, root length, and root and shoot weight was dependent on cultivars. For the plug transplant trial, the overall average of plant mortality among all tested strawberry cultivars was 0.1%, suggesting higher tolerance against P. cactorum when vigorous transplants were used. Conversely, the repeated bare-root transplant trial demonstrated different levels of susceptibility in strawberry cultivars when transplants were inoculated with P. cactorum. ‘Sweet Sensation’ ‘Florida127’, ‘Florida Brilliance’, ‘Florida Radiance’ and ‘Winterstar FL 05-107’ were highly susceptible, whereas ‘Florida Elyana’ and ‘Strawberry Festival’ were resistant. Moreover, ‘Florida Beauty’ was moderately resistant to P. cactorum. Our findings demonstrated the importance of using vigorous transplants to reduce P. cactorum damage. Sting nematode reproduction was suppressed when strawberry transplants were inoculated with P. cactorum, suggesting an antagonistic interaction between the pathogens. None of the cultivars was tolerant to B. longicaudatus as this nematode reproduced from 13.4- to 23.8-fold and caused root damage under glasshouse conditions.","PeriodicalId":18928,"journal":{"name":"Nematology","volume":null,"pages":null},"PeriodicalIF":1.2,"publicationDate":"2023-04-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"43482348","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Nematicidal and antioxidant activities of the methanolic extract from Tithonia diversifolia grown in Vietnam 越南多叶穿山甲甲醇提取物的杀线虫活性和抗氧化活性

IF 1.2 4区生物学

Nematology Pub Date : 2023-04-12 DOI: 10.1163/15685411-bja10241

Dang-Minh-Chanh Nguyen, Thi-Hoan Luong, X. Nguyen, W. Jung

{"title":"Nematicidal and antioxidant activities of the methanolic extract from Tithonia diversifolia grown in Vietnam","authors":"Dang-Minh-Chanh Nguyen, Thi-Hoan Luong, X. Nguyen, W. Jung","doi":"10.1163/15685411-bja10241","DOIUrl":"https://doi.org/10.1163/15685411-bja10241","url":null,"abstract":"\u0000This study aimed to evaluate the nematicidal activity of the Tithonia diversifolia leaf extract (TDE) against Meloidogyne incognita under in vitro and pot conditions. In addition, the antioxidant activity of TDE was evaluated using the 2,2-Diphenyl-2-picrylhydrazyl hydrate (DPPH) and 2,2′-azinobis-(3-ethylbenzothiazoline-6-sulfonic acid) (ABTS) assays. The results revealed that TDE possesses antioxidant potential. Nematicidal activity bioassays revealed that the TDE treatment resulted in 3.0, 16.3, 36.6, 52.4 and 64.2% second-stage juvenile (J2) hatch inhibition at MeOH control, 0.125, 0.25, 0.5 and 1.0 mg ml−1, respectively, for a 5-day treatment. The corresponding values for a 10-day treatment were 3.3, 16.0, 30.7, 56.0 and 69.3%, respectively. The TDE treatment resulted in 64.6, 86.4, 95.3 and 100% J2 movement inhibition at 0.125, 0.25, 0.5 and 1.0 mg ml−1, respectively, for a 48 h treatment. In pot experiments, at 60 days after treatment (DAT), the J2 populations in non-treated, 0.25, 0.5, 1.0 mg TDE (g soil)−1, and Tervigo 020SC 1.0 mg (g soil)−1 were 477.1, 277.3, 142.7, 23.9 and 19.7 per 5 g of root, respectively. The corresponding values in 100 g of soil were 33.2, 5.5, 3.6, 1.1 and 4.0, respectively. The relative galling formation on the Robusta coffee plants was 100, 55.3, 39.1, 33.5 and 80.8% in the non-treated, 0.25, 0.5, 1.0 mg TDE (g soil)−1, and Tervigo-treated plants, respectively. These results may provide crucial information for exploring the nematicidal metabolites of TDE against M. incognita. Therefore, the purified active compounds of TDE should be identified in future studies before the commercialisation of TDE for the biocontrol of M. incognita.","PeriodicalId":18928,"journal":{"name":"Nematology","volume":null,"pages":null},"PeriodicalIF":1.2,"publicationDate":"2023-04-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"45547809","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Description of Laimaphelenchus shanxiensis sp. n. (Rhabditida: Aphelenchoididae) from Shanxi province, P.R. China 山西Laimaphelenchus shanxiensis sp.n的记述

IF 1.2 4区生物学

Nematology Pub Date : 2023-04-07 DOI: 10.1163/15685411-bja10239

Liyi Wang, Tian Yin, Yimeng Yang, Z. Zhao, Jianming Wang, Yumei Xu

引用次数: 0

Morphological and molecular characterisation of Talanema maculatum sp. n. (Dorylaimida, Qudsianematidae) from Iran 伊朗黄斑塔拉蝇属(Dorylaimida, Qudsianematidae)形态学和分子特征

IF 1.2 4区生物学

Nematology Pub Date : 2023-04-05 DOI: 10.1163/15685411-bja10242

M. Asgari, Mahsa Mohammadlou, A. Eskandari, J. Abolafia, R. Peña‐Santiago

引用次数: 0

On the phylogenetic status of Contortylenchus genitalicola Kosaka & Ogura, 1993 生殖圆线虫Kosaka&Ogura，1993的系统发育状况

IF 1.2 4区生物学

Nematology Pub Date : 2023-03-31 DOI: 10.1163/15685411-bja10233

N. Kanzaki, H. Kosaka, Yuta Fujimori, M. Akiba

引用次数: 0

Schistonchus pumilae n. sp. isolated from syconia of a creeper fig, Ficus pumila L. from the Japanese warm temperate zone 从日本暖温带的攀缘无花果（Ficus pumila L.）的悬铃木中分离得到的短柄木（Schistonchus pumilae n.sp.）

IF 1.2 4区生物学

Nematology Pub Date : 2023-03-31 DOI: 10.1163/15685411-bja10236

N. Kanzaki, Ryusei Tanaka, R. Giblin-Davis

{"title":"Schistonchus pumilae n. sp. isolated from syconia of a creeper fig, Ficus pumila L. from the Japanese warm temperate zone","authors":"N. Kanzaki, Ryusei Tanaka, R. Giblin-Davis","doi":"10.1163/15685411-bja10236","DOIUrl":"https://doi.org/10.1163/15685411-bja10236","url":null,"abstract":"\u0000A Schistonchus species was isolated from the syconia of the creeping fig, Ficus pumila, collected from Miyazaki, Japan. The nematode was considered an undescribed species based on its typological characters, molecular profiles (near full length of small subunit and D3 expansion segment of large subunit of RNA) and phylogenetic status inferred from these two loci. The new species is characterised by the presence of flagellate sperm, spicule possessing small condylus, triangular rostrum with bluntly pointed tip and clear dorsal and ventral limbs, structure and arrangement of male caudal papillae, i.e., presence of papilliform P3 and P3a and small and gland opening-like P4 (glandpapillae), relatively short post-uterine sac and female tail forming elongate conoid. It is phylogenetically close to S. hirtus. However, the new species is distinguished from other nominal Schistonchus species by its female tail shape forming elongate conoid, the structure and arrangement of male caudal papillae and several other typological characters. In addition, the host fig of the nematode, F. pumila, is a creeper fig species belonging to subgenus Synoecia (section Rhizocladus; subsection Plagiostigma), from which no fig-associated nematode has been reported so far, i.e., the present study is the first report of Schistonchus (and other syconia-inhabiting nematodes) from the Ficus subgenus Synoecia.","PeriodicalId":18928,"journal":{"name":"Nematology","volume":null,"pages":null},"PeriodicalIF":1.2,"publicationDate":"2023-03-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"45580533","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 1