FAZARI , Ariane

National audience

National audience

This article shows a simplified protocol for the identification of root-knot nematode species (Meloidogyne spp.). A biochemical study sets out that the species of these nematodes can be differentiated by their enzyme phenotype and in particular with their esterases. This identification method is reliable. It is based on the differential...

International audience

Root-knot nematodes (RKNs), Meloidogyne spp., are extremely polyphagous plant parasites worldwide. Since the use of most chemical nematicides is being prohibited, genetic resistance is an efficient alternative way to protect crops against these pests. However, few resistance genes (Rgenes) are available and some nematode populations may become...

Key message The plant genetic background influences the efficiency of major resistance genes to root-knot nematodes in pepper and has to be considered in breeding strategies. Root-knot nematodes (RKNs), Meloidogyne spp., are extremely polyphagous plant parasites worldwide. Since the use of most chemical nematicides is being prohibited, genetic...

Root-knot nematodes, Meloidogyne spp., are extremely polyphagous plant parasites worldwide. Since the use of most chemical nematicides is being prohibited, genetic resistance is an efficient alternative way ta protect crops against these pests. However, resistance genes (R-genes) are limited and nematode populations are able ta overcome them...

International audience

With the banning of most chemical nematicides, the control of root knot nematodes (RKNs) in vegetable crops is mainly based on the deployment of single-major resistance genes (R-genes). However, these genes are rare and their efficiency is threatened by RKNs capacities of adaptation. ln pepper, several dominant R-genes are efficient against...

With the banning of most chemical nematicides, the control of root-knot nematodes (RKNs) in vegetable crops is now based essentially on the deployment of single, major resistance genes (R-genes). However, these genes are rare and their efficacy is threatened by the capacity of RKNs to adapt. In pepper, several dominant R-genes are effective...

Root-knot nematodes (RKNs, Meloidogyne spp.) are major plant pathogens of vegetables in most production areas, including the Solanaceous crops tomato and pepper. Due to the banning of chemical nematicides, current control strategies are mainly based on the deployment of resistance genes (R-genes), i.e., Mi(s) in tomato, Me(s) in pepper. These...

Root-knot nematodes (RKNs) can severely damage crops, including peppers, worldwide. The application of resistance genes identified in the Capsicum annuum genome may represent a safe and economically relevant strategy for controlling RKNs. Among the Me genes (Me1, Me3, Me7, and N) that have been mapped to a cluster on chromosome P9, Me1 confers...

The PM687 line of Capsicum annuum L. has a single dominant gene, Me-3, that confers heat-stable resistance to root-knot nematodes (RKN). Me-3 was mapped using doubled-haploid (DH) lines and F-2 progeny from a cross between the susceptible cultivar 'Yolo Wonder' ('YW') and the highly resistant line 'PM687'. Bulked-segregant analysis with DNA...

National audience

Root knot nematodes are obligate phytoparasites that invade the roots of important crop plants causing severe economic losses. Arbuscular Mycorrhizal Fungi (AMF) are soil borne microorganisms that establish mutualistic associations with the roots of most plants. AMF have been frequently indicated to help their host to attenuate the damage...

The current restrictions on the use of chemical nematicides have contributed to increase rootknot nematode problems in horticultural crops. ln this context, plant resistance appears as the most effective method of control, but the possible occurrence of virulent nematodes able to reproduce on R-plants may constitute a severe threat to this...

National audience

International audience

National audience

International audience

Background: Resistant cultivars are key elements for pathogen control and pesticide reduction, but their repeated use may lead to the emergence of virulent pathogen populations, able to overcome the resistance. Increased research efforts, mainly based on theoretical studies, explore spatio-temporal deployment strategies of resistance genes in...

Current restrictions on the use of chemical nematicides have led to an increase in root-knot nematode (RKN) damages in horticultural crops. The effects of two sorghums as summer cover crops, Sorghum sudanense sudan-grass cv. 'Piper' or sudangrass hybrid [S. bicolor x S. sudanense] '270911', respectively with low and high dhurrin contents, were...

National audience

Root-knot nematodes are causing serious economic losses of vegetable production. Actual agroecological control solutions are not effective enough to control this pest or are difficult to implement in farms. There is little knowledge on the use of crops to trap nematodes in protected cultivation systems. Therefore, we tested a resistant pepper...

Plant-parasitic nematodes (PPN) are detected everywhere as mixed-species communities. Most non-chemical control strategies of PPN only target some species, thus raising questions about the consequences that this specificity may have on the residual community. In this respect, the long-term ecological sustainability of such strategies is...