Impact of phytonematodes on agriculture economy.

Abd-Elgawad, Mahfouz M. M.; Askary, T. H.; Martinelli, P. R. P.

doi:10.1079/9781780643755.0003

Cited by 103 publications

(59 citation statements)

References 0 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…Since PPNs generally have aggregated or patchy distribution in Egypt (e.g., Abd-Elgawad 1992; Abd-Elgawad and Hasabo 1995) and elsewhere (Duncan and Phillips 2009;Abd-Elgawad and Askary 2015), symptoms of RKN infection tend to occur in more or less definite areas where transplants fail to develop normally ( Fig. 1).…”

Section: Ppns Of Strawberry In Egyptmentioning

confidence: 99%

“…Since strawberry is transplanted in Egypt as a winter crop in September and October, it is usually rotated with traditional summer crops such as cotton (Gossypium hirsuture), soybean (Glycine max), maize (Zea mays), or peanut (Arachis hypogaea). Such summer crops have been useful in rotation sequences for suppressing certain species and races of RKNs (e.g., McSorley and Gallaher 1991;Rodriguez-Kabana et al 1991;Chen and Tsay 2006;Abd-Elgawad and Askary 2015). Chen and Tsay (2006) evaluated ten potential rotation crops and two cultural practices for their effect on nematode population levels of root-knot and lesion nematodes and influence on strawberry yield in 12 fields.…”

Section: Common Cultural Practices In Egyptmentioning

confidence: 99%

See 1 more Smart Citation

Plant-parasitic nematodes of strawberry in Egypt: a review

Abd-Elgawad

2019

Bull Natl Res Cent

View full text Add to dashboard Cite

Egypt is experiencing a revival of the strawberry cultivation backed by its Mediterranean climate, fertile soils, and geographic location which support high production and profitability of such a specialty crop. These factors can collectively offer early fruiting and long harvest season, good quality, low production costs, and closeness of export markets. However, plantparasitic nematodes (PPNs) rank high among pests and diseases that can cause considerable yield losses in the crop size and quality. The nematode losses vary according to nematode species, population density, and biotic and abiotic factors. Interaction of nematodes with soil-borne fungi increases the severity of disease, and their synergistic effect may result in much higher losses. Therefore, important PPNs on strawberry in Egypt and issues relevant to strawberry yield losses are presented herein. Meloidogyne spp. are the most predominant species on strawberry plants in Egypt. Integration of different methods such as cultural, chemical use of resistant cultivars and naturally occurring biological control agents suggested herein can play a significant role in sustainable nematode pest management of strawberry. For nurseries, there is an urgent need to motivate private and governmental sectors to satisfy the requirement of our national certified strawberry seedlings.

show abstract

Section: Ppns Of Strawberry In Egyptmentioning

confidence: 99%

Section: Common Cultural Practices In Egyptmentioning

confidence: 99%

Plant-parasitic nematodes of strawberry in Egypt: a review

Abd-Elgawad

2019

Bull Natl Res Cent

View full text Add to dashboard Cite

show abstract

“…Root-knot nematodes (RKNs) seriously threaten global food production: these microscopic, soil-dwelling worms are highly destructive and cause up to 100% yield loss in important life-sustaining crops like soybean, rice, cotton, tomato, etc. [1,2,3]. Their destructive capacities are due to their ability to infect roots and cause galls (swellings or knots) in their host plants.…”

Section: Introductionmentioning

confidence: 99%

A Chemosensory GPCR as a Potential Target to Control the Root-Knot Nematode Meloidogyne incognita Parasitism in Plants

et al. 2019

View full text Add to dashboard Cite

Root-knot nematodes (RKN), from the Meloidogyne genus, have a worldwide distribution and cause severe economic damage to many life-sustaining crops. Because of their lack of specificity and danger to the environment, most chemical nematicides have been banned from use. Thus, there is a great need for new and safe compounds to control RKN. Such research involves identifying beforehand the nematode proteins essential to the invasion. Since G protein-coupled receptors GPCRs are the target of a large number of drugs, we have focused our research on the identification of putative nematode GPCRs such as those capable of controlling the movement of the parasite towards (or within) its host. A datamining procedure applied to the genome of Meloidogyne incognita allowed us to identify a GPCR, belonging to the neuropeptide GPCR family that can serve as a target to carry out a virtual screening campaign. We reconstructed a 3D model of this receptor by homology modeling and validated it through extensive molecular dynamics simulations. This model was used for large scale molecular dockings which produced a filtered limited set of putative antagonists for this GPCR. Preliminary experiments using these selected molecules allowed the identification of an active compound, namely C260-2124, from the ChemDiv provider, which can serve as a starting point for further investigations.

show abstract

“…Plant parasitic nematodes are among the most significant constraints to sustainable agriculture and achievement of food security [1]. Root knot nematodes (Meloidogyne spp.…”

Section: Introductionmentioning

confidence: 99%

Mitigating Root Knot Nematode Propagation on Transgenic Tobacco via <i>in Planta</i> Hairpin RNA Expression of <i>Meloidogyne incognita</i>—Specific PolA1 Sequence

Chukwurah¹,

Poku²,

Yokoyama³

et al. 2019

AJPS

View full text Add to dashboard Cite

Root knot nematodes are top priority nematode pests that significantly constrain agricultural productivity globally especially in developing countries. However, expressing double stranded RNA (dsRNA) of essential nematode genes in susceptible plants is known to confer protection against these pests via RNA silencing. This molecular-based strategy is called host induced gene silencing (HIGS) and the selection of appropriate target nematode gene is critical to its success. In this study, therefore, we focused on root knot nematode PolA1, an essential single copy nuclear gene encoding the largest subunit of RNA polymerase I enzyme and evaluated its effectiveness as a target in conferring nematode resistance on Agrobacterium-mediated transformed tobacco plants. Transgenic tobacco expressing Meloidogyne incognita-specific (MiS) dsRNA of PolA1 gene showed significant reduction in nematode fecundity and multiplication compared to wild type plants in both T 0 and T 1 generations. T 0 plants showed varying degrees of agronomic vigorover WT plants possibly due to varying levels of processed siRNA. However, production of MiS siRNAs in the transgenic plants coupled with significant reduction of PolA1 transcript expression in nematodes feeding on roots of transgenic plants provided evidence of HIGS. Taken together, our results show that PolA1 is a potentially effective target for HIGS-mediated reduction of root knot nematode damage on transgenic tobacco. Given the homology of our target sequence among Meloidogyne species, this protection could be broad range against other root knot nematodes aside M. incognita.

show abstract

Impact of phytonematodes on agriculture economy.

Cited by 103 publications

References 0 publications

Plant-parasitic nematodes of strawberry in Egypt: a review

Plant-parasitic nematodes of strawberry in Egypt: a review

A Chemosensory GPCR as a Potential Target to Control the Root-Knot Nematode Meloidogyne incognita Parasitism in Plants

Mitigating Root Knot Nematode Propagation on Transgenic Tobacco via <i>in Planta</i> Hairpin RNA Expression of <i>Meloidogyne incognita</i>—Specific PolA1 Sequence

Contact Info

Product

Resources

About

Impact of phytonematodes on agriculture economy.

Cited by 103 publications

References 0 publications

Plant-parasitic nematodes of strawberry in Egypt: a review

Plant-parasitic nematodes of strawberry in Egypt: a review

A Chemosensory GPCR as a Potential Target to Control the Root-Knot Nematode Meloidogyne incognita Parasitism in Plants

Mitigating Root Knot Nematode Propagation on Transgenic Tobacco via &lt;i&gt;in Planta&lt;/i&gt; Hairpin RNA Expression of &lt;i&gt;Meloidogyne incognita&lt;/i&gt;—Specific PolA1 Sequence

Contact Info

Product

Resources

About

Mitigating Root Knot Nematode Propagation on Transgenic Tobacco via <i>in Planta</i> Hairpin RNA Expression of <i>Meloidogyne incognita</i>—Specific PolA1 Sequence