Meloidogyne incognita - rice (Oryza sativa) interaction: a new model system to study plant-root-knot nematode interactions in monocotyledons.

Background: Plant-parasitic nematodes developed strategies to invade and colonize their host plants, including expression of immune suppressors to overcome host defenses. Meloidogyne graminicola and M. incognita are root-knot nematode (RKN) species reported to damage rice (Oryza sativa L.

Intraspecific variability of the facultative meiotic parthenogenetic root-knot nematode (Meloidogyne graminicola) from rice fields in Vietnam.

Twenty years ago, the facultative meiotic parthenogenetic root-knot nematode (RKN), Meloidogyne graminicola, was recognised as an important rice pathogen in South Vietnam. Although this country is one of the most important rice exporters worldwide, a comprehensive picture of the occurrence of M. graminicola in Vietnamese rice fields is still not available.

High-Quality Draft Genome Sequence of the Xanthomonas translucens pv. cerealis Pathotype Strain CFBP 2541.

Xanthomonas translucens pv. cerealis is the causal agent of bacterial leaf streak on true grasses. The genome of the pathotype strain CFBP 2541 was sequenced in order to decipher mechanisms that provoke disease and to elucidate the role of transcription activator-like (TAL) type III effectors in pathogenicity.

Draft Genome Sequences of Two Xanthomonas vesicatoria Strains from the Balkan Peninsula.

Xanthomonas vesicatoria causes bacterial spot disease of pepper and tomato plants. We report here the first genome sequences of X. vesicatoria strains that have been isolated from pepper plants.

Draft Genome Sequences of Two Xanthomonas euvesicatoria Strains from the Balkan Peninsula.

We report the draft genome sequences of two Xanthomonas euvesicatoria strains from the Balkan Peninsula, which were isolated from symptomatic pepper plants. The availability of these genome sequences will facilitate the development of modern genotyping assays for X. euvesicatoria strains and to define targets for resistance breeding.

Confirmation of Bacterial Leaf Streak Caused by Xanthomonas oryzae pv. oryzicola on Rice in Madagascar.

Bacterial leaf streak (BLS) caused by Xanthomonas oryzae pv. oryzicola is an important disease of rice. BLS is prevalent in Asia and West Africa, where it was first reported in Nigeria and Senegal in the early 1980s (4).

Draft Genome Sequence of Xanthomonas axonopodis pv. allii Strain CFBP 6369.

We report here the draft genome sequence of Xanthomonas axonopodis pv. allii strain CFBP 6369, the causal agent of bacterial blight of onion. The draft genome has a size of 5,425,942 bp and a G+C content of 64.

A TAL effector repeat architecture for frameshift binding.

Transcription activator-like effectors (TALEs) are important Xanthomonas virulence factors that bind DNA via a unique tandem 34-amino-acid repeat domain to induce expression of plant genes. So far, TALE repeats are described to bind as a consecutive array to a consecutive DNA sequence, in which each repeat independently recognizes a single DNA base. This modular protein architecture enables the design of any desired DNA-binding specificity for biotechnology applications.

Identification, Characterization, and Distribution of Southern rice black-streaked dwarf virus in Vietnam.

A novel dwarf and twisting syndrome first observed on rice in Nghe An Province, Vietnam, in 2009 has spread rapidly to the other 19 provinces of North and Central Vietnam. Infected rice plants showed stunting, darkening of leaves, twisting of leaf tips, and splitting of leaf margins. At a later stage, white waxy enations that eventually turned black were observed on the underside of leaf blades, leaf sheaths, and culms.

Why Rice yellow mottle virus, a rapidly evolving RNA plant virus, is not efficient at breaking rymv1-2 resistance.

Rice yellow mottle virus (RYMV) reaches a high virus content in rice, is genetically highly variable and evolves rapidly. Nevertheless, only a small proportion of isolates overcome rymv1-2 rice resistance by mutations in the VPg (viral protein genome-linked). The accumulation rates of wild-type (WT) and resistance-breaking (RB) genotypes of the E- and T-pathotypes of RYMV, with average and low virulence, respectively, were assessed.