Molecular cloning and pharmacology of Min‐UNC‐49B , a GABA receptor from the southern root‐knot nematode Meloidogyne incognita

2020 ◽  
Author(s):  
Kazuki Nomura ◽  
Satoru Yoshizumi ◽  
Fumiyo Ozoe ◽  
Yoshihisa Ozoe
Keyword(s):  
Molecular Cloning ◽  
Meloidogyne Incognita ◽  
Gaba Receptor ◽  
Root Knot Nematode ◽  
Southern Root Knot Nematode

scholarly journals Controlling the southern root-knot nematode (Meloidogyne incognita Chitwood) with grafted and resistant pepper varieties

2010 ◽  
Vol 16 (2) ◽  
Author(s):  
Z. Mándoki
Keyword(s):  
Meloidogyne Incognita ◽  
Control Method ◽  
Environmentally Friendly ◽  
Bell Pepper ◽  
N Gene ◽  
Root Knot Nematode ◽  
Resistant Varieties ◽  
Environmentally Safe ◽  
Resistant Rootstock ◽  
Southern Root Knot Nematode

Newly bred resistant bell pepper varieties and those grafted onto resistant rootstock s were tested in soil severely infested with southern root-knot nematode [Meloidogy11e incognita (Kofoid and White) Chitwood] in unheated plastic house and compared to varieties on their own roots, in order to evaluate the efficiency of this environmentally friendly control method. 'Cinema F I ' carrying the N gene yielded significantly more than the two susceptible varieties. Varieties grafted onto resistant rootstocks outyielded those on their own roots although to different extent, which was not always significant. At the end of the vegetat ion period the roots of the rootstocks were undamaged and the roots of some resistant varieties were slightly infected. whereas the roots of susceptible varieties were severely damaged. According to our result  . both the use of resistant varieties and grafted plants offer an effective and environmentally safe way of controlling M. incognita.

scholarly journals Effect of Glomus Mosseae (Arbuscular Mycorrhizal Fungus) On Host - Parasite Relationship of Meloidogyne Incognita (Southern Root-Knot Nematode) on Four Improved Cowpea Varieties

2010 ◽  
Vol 50 (3) ◽  
pp. 321-325 ◽  
Author(s):  
Ishola Odeyemi ◽  
Steve Afolami ◽  
Olufemi Sosanya
Keyword(s):  
Meloidogyne Incognita ◽  
Glomus Mosseae ◽  
Mycorrhizal Fungus ◽  
Arbuscular Mycorrhizal ◽  
Root Knot Nematode ◽  
Parasite Relationship ◽  
Cowpea Varieties ◽  
Host Parasite ◽  
Southern Root Knot Nematode ◽  
Relationship Of

Effect of Glomus Mosseae (Arbuscular Mycorrhizal Fungus) On Host - Parasite Relationship of Meloidogyne Incognita (Southern Root-Knot Nematode) on Four Improved Cowpea VarietiesTwo pot experiments and a field study were conducted in a Randomized Complete Block Design (RCBD). The experiments were conducted to determine the effect ofGlomus mosseae, a mycorrhiza fungus, on the reaction of four improved cowpea varieties toMeloidogyne incognita.Cowpea plants were inoculated with a single or a combination of 5 000 eggs ofM. incognitaand 50 g ofG. mosseaeinoculum containing 5 spores/g of soil. The standardized method of screening and reporting resistance of crop germplasm to root-knot nematodes at 60 days after planting, and the modified version of including yield for resistance rating at harvest were used for this study. Root galling due toM. incognitainfection was significantly lower on all the cowpea varieties treated withG. mosseaeand more significantly on IT90K-277-2 and IT89KD-288 in the screenhouse.G. mosseae, suppressed root-knot nematode reproduction on all the varieties compared to cowpea plants infected only byM. incognitaboth in the screenhouse and field experiments. Also,G. mosseaemitigated the damage attributable to the root-knot nematode on all these varieties. Using Gall Index (GI), reproduction factor and yield,G. mosseaewas effective in improving the resistance of the cowpea varieties toM. incognita.IT90K-76 cowpea variety was consistently resistant to the root-knot nematode, while IT90K-277-2 was tolerant withM. incognitainfection but resistant withG. mosseaetreatment. IT90K-941-1 variety was resistant in the screenhouse. The results of this study also confirmedG. mosseaeas a potential bio-control agent forM. incognitaon these cowpea varieties.

Effect of Southern Root-knot Nematode (Meloidogyne incognita race 3) on Corn Yields in Alabama

2008 ◽  
Vol 9 (1) ◽  
pp. 11 ◽  
Author(s):  
K. L. Bowen ◽  
A. K. Hagan ◽  
H. L. Campbell ◽  
S. Nightengale
Keyword(s):  
Meloidogyne Incognita ◽  
Root Knot Nematode ◽  
Management Decisions ◽  
Root Knot Nematodes ◽  
Percent Loss ◽  
Stage Juvenile ◽  
Risk Thresholds ◽  
Southern Root Knot Nematode ◽  
Soil Losses ◽  
Corn Grain

In Alabama and other southeastern states, corn is frequently planted in rotation with cotton and peanut in order to minimize soil-borne pest problems. Even in areas where peanut is not grown, corn is increasingly being planted in rotation with cotton. However, one root-knot nematode, Meloidogyne incognita race 3, causes damage to both cotton and corn. In this study, we determined levels of corn grain loss when southern root-knot nematodes are present in soil. Losses were 3.8 to 11.4% based on preceding years' counts and 2.2 to 7.0% with current years' counts for every 100 2nd-stage juvenile root-knot nematodes in 100 cm ≥ of soil. Knowledge of the percent loss in corn grain due to southern rootknot nematode populations can provide additional guidance for use of risk thresholds when growers are making management decisions. Accepted for publication 21 June 2008. Published 10 September 2008.

scholarly journals Screening of cucumber (Cucumis sativus L.) cultivars against southern root knot nematode, Meloidogyne incognita (Kofoid and White) Chitwood

2020 ◽  
Vol 49 (3) ◽  
pp. 579-584
Author(s):  
Ifra Siddique ◽  
Ishrat Naz ◽  
Raja Asad Ali Khan ◽  
Musharaf Ahmed ◽  
Syeda Maryam Hussain
Keyword(s):  
Population Density ◽  
Meloidogyne Incognita ◽  
Growth Parameters ◽  
High Population Density ◽  
In Planta ◽  
Root Knot Nematode ◽  
Cucumis Sativus L ◽  
Southern Root Knot Nematode ◽  
Moderately Resistant ◽  
Significant Mortality

Fourteen cultivars of cucumber were screened for their resistance to the Southern root-knot nematode, Meloidogyne incognita (Kofoid and White) Chitwood in an in planta experiment. The pots were maintained in greenhouse with CRD for 50 days after inoculation. The cultivar DS92-05 induced significant mortality and was rated “moderately resistant (MR)”. This cultivar showed increase in plant growth parameters including vine length. The cultivars DS92-06, Laghman, Sultan and Desitype were moderately susceptible (MS). The cultivar Rehan and DS96-299 were rated susceptible (S) whereas DS97-299, Chaiya, Beitalpha, Alto, DS92-04 and Local were rated as highly susceptible (HS). DS92-05 is thus promising for sustainable agriculture, specially in those areas with high population density of Southern Root knot nematode.

scholarly journals Retention of Resistance to Fusarium oxysporum f. sp. niveum in Cucurbit Rootstocks Infected by Meloidogyne incognita

Plant Disease ◽  
2018 ◽  
Vol 102 (9) ◽  
pp. 1820-1827 ◽  
Author(s):  
Anthony P. Keinath ◽  
Paula A. Agudelo
Keyword(s):  
Fusarium Oxysporum ◽  
Fusarium Wilt ◽  
Meloidogyne Incognita ◽  
Interspecific Hybrid ◽  
Bottle Gourd ◽  
Root Knot Nematode ◽  
Summer Squash ◽  
Race 1 ◽  
Race 2 ◽  
Southern Root Knot Nematode

Interspecific hybrid squash (Cucurbita maxima × C. moschata ‘Strong Tosa’) and bottle gourd (Lagenaria siceraria ‘Macis’) rootstocks are resistant to Fusarium oxysporum f. sp. niveum but susceptible to Meloidogyne incognita (Southern root-knot nematode). Coinfection of Early Prolific Straightneck summer squash (C. pepo) with root-knot nematode and F. oxysporum f. sp. niveum has been reported to increase susceptibility to Fusarium wilt. The objectives of this study were to determine whether such an interaction occurred between M. incognita and F. oxysporum f. sp. niveum races 1 and 2 on Strong Tosa, Macis, and watermelon cultivars Fascination (resistant to race 1) and Tri-X 313 (susceptible to both races). Hosts were inoculated in a greenhouse with one of four pathogen treatments: F. oxysporum f. sp. niveum, M. incognita, both pathogens, or neither pathogen. Galling was present on ≥10% of the root systems of 90% of the plants inoculated with M. incognita. Bottle gourd had less galling than interspecific hybrid squash. Plants not inoculated with F. oxysporum f. sp. niveum did not wilt. Four weeks after inoculation, incidence and severity of Fusarium wilt and recovery of F. oxysporum did not differ for any hosts inoculated with F. oxysporum f. sp. niveum alone and F. oxysporum f. sp. niveum plus M. incognita (host–treatment interactions not significant). In general, Early Prolific Straightneck grouped with the F. oxysporum f. sp. niveum-resistant rootstocks when inoculated with F. oxysporum f. sp. niveum race 2 and with the susceptible watermelon when inoculated with race 1, regardless of inoculation with M. incognita. Recovery of F. oxysporum from stems of inoculated watermelon was greater than recovery from the other three hosts, regardless of nematode inoculation. In conclusion, our experiments do not support the hypothesis that resistance to F. oxysporum f. sp. niveum in cucurbit rootstocks or resistant watermelon cultivars would be compromised when M. incognita infects the roots.

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