Etiology of Bacterial Soft Rot and Corm Decay in Saffron.

Saffron ( L.) is the world's most expensive spice. The plant is propagated vegetatively through corms.

Monitoring the Occurrence and Distribution of Stewart's Wilt of Maize in Iran.

Stewart's wilt of maize caused by the Gram-negative bacterium Pantoea stewartii subsp. stewartii is one of economically important diseases of the crop around the globe. The disease has not yet been reported in Iran.

Wild mushrooms as potential reservoirs of plant pathogenic bacteria: a case study on .

Fruit bodies (sporocarps) of wild mushrooms growing in natural environments play a substantial role in the preservation of microbial communities, for example, clinical and food-poisoning bacteria. However, the role of wild mushrooms as natural reservoirs of plant pathogenic bacteria remains almost entirely unknown. Furthermore, bacterial transmission from a mushroom species to agricultural plants has rarely been recorded in the literature.

Multiphasic investigations imply transfer of orange-/red-pigmented strains of the bean pathogen Curtobacterium flaccumfaciens pv. flaccumfaciens to a new species as C. aurantiacum sp. nov., elevation of the poinsettia pathogen C. flaccumfaciens pv. poinsettiae to the species level as C. Poinsettiae sp. nov., and synonymy of C. albidum with C. citreum.

Curtobacterium flaccumfaciens (Microbacteriaceae), a plant-pathogenic coryneform species includes five pathovars with valid names and a number of proposed - but unvalidated - new members. In this study, phenotypic features and DNA similarity indexes were investigated among all C. flaccumfaciens members.

Clonality and Diversity in the Soft Rot Phytopathogen.

Bacterial diversity analyses often suffer from a bias due to sampling only from a limited number of hosts or narrow geographic locations. This was the case for the phytopathogenic species , whose members were mainly isolated from a few hosts-potato and ornamentals-and from the same geographical area-Europe and Israel, which are connected by seed trade. Most members were clonal with the notable exception of the potato isolate RNS05.

Pathovar-Specific PCR Method for Detection and Identification of pv. .

Bacterial leaf streak disease caused by pv. is an economically important disease threatening wheat and barley crops around the globe. Thus far, specific PCR-based detection and identification tests for pathovars are not available.

Analysis of the Diversity of Strains Held in CIRM-CFBP Reveals a Strongly Homogenous Species.

is the causal agent of blight and canker on grapevine. Only a few data are available on this species implying that the occurrence of this pathogen may be underestimated, and its actual ecological niche may not be understood. Moreover, its genetic diversity is not well known.

sp. nov. and sp. nov., isolated from crown gall tissues.

The genus contains a set of diverse bacterial strains, most of which are known for their pathogenicity on annual crops and fruit trees causing economically important plant diseases. Recently, five strains were isolated from -induced crown gall tissues of amaranth ( sp.) and weeping fig () plants in Iran.

The Broad Host Range Plant Pathogen Shows a High Genetic Diversity.

The wide host range phytopathogen , first described in ornamentals in the 1950s, rapidly became a threat for potato production in Europe and, more recently, worldwide. Previous genomic analyses, mainly of strains isolated from potato, revealed little sequence diversity. To further analyse genomic diversity, we used a larger genome panel of 41 isolates encompassing more strains isolated from potato over a wide time scale and more strains isolated from other hosts.

Taxonomic Refinement of .

comprises a number of economically important fruit tree pathogens classified within different pathovars. Dozens of nonpathogenic and taxonomically unvalidated strains are also designated as , leading to a complicated taxonomic status in the species. In this study, we have evaluated the whole-genome resources of all available spp.

Phenotypic and Molecular-Phylogenetic Analyses Reveal Distinct Features of Crown Gall-Associated Strains.

In summer 2019, widespread occurrence of crown gall disease caused by spp. was observed on commercially grown ornamental plants in southern Iran. Beside agrobacteria, pale yellow-pigmented Gram-negative strains resembling the members of were also associated with crown gall tissues on weeping fig (Ficus benjamina) and sp.

Yeast Plasma Membrane Fungal Oligopeptide Transporters Display Distinct Substrate Preferences despite Their High Sequence Identity.

Fungal Oligopeptide Transporters (Fot) Fot1, Fot2 and Fot3 have been found in wine strains, but not in strains from other environments. In the wine strain EC1118, Fot1 and Fot2 are responsible for a broader range of oligopeptide utilization in comparison with strains not containing any Fot. This leads to better fermentation efficiency and an increased production of desirable organoleptic compounds in wine.

The Complete Genome Sequence of , the Causal Agent of Canker on Tea Plants, Reveals Novel Secretion Systems in Clade-1 Xanthomonads.

is the causal agent of bacterial canker on tea plants. There is no complete genome sequence available for , a close relative of the species and , thus limiting basic research for this group of pathogens. Here, we release a high-quality complete genome sequence for the type strain, CFBP 4691.

Updated Taxonomy of Genus in the CIRM-CFBP Bacterial Collection: When Newly Described Species Reveal "Old" Endemic Population.

Bacterial collections are invaluable tools for microbiologists. However, their practical use is compromised by imprecise taxonomical assignation of bacterial strains. This is particularly true for soft rotting plant pathogens of the genus.

Clarifying the taxonomy of the causal agent of bacterial leaf spot of lettuce through a polyphasic approach reveals that Xanthomonas cynarae Trébaol et al. 2000 emend. Timilsina et al. 2019 is a later heterotypic synonym of Xanthomonas hortorum Vauterin et al. 1995.

Assessment of the taxonomy and diversity of Xanthomonas strains causing bacterial leaf spot of lettuce (BLSL), commonly referred to as Xanthomonas campestris pv. vitians, has been a long-lasting issue which held back the global efforts made to understand this pathogen. In order to provide a sound basis essential to its study, we conducted a polyphasic approach on strains obtained through sampling campaigns or acquired from collections.

High-Quality Genome Resource of Generated via Long-Read Sequencing.

The bacterial plant pathogen is the causal agent of yellow disease of and other ornamental plant genera. There is no available complete genome for , limiting basic research for this pathogen. Here, we release a high-quality complete genome sequence for the type strain, CFBP 1156.

Comparative Genomics and Phylogenetic Analyses Suggest Several Novel Species within the Genus , Including Nonpathogenic Tomato-Associated Strains.

Members of the genus are economically important bacterial plant pathogens infecting a set of diverse agricultural crops (e.g., alfalfa, corn, potato, tomato, and wheat).

Elevation of subsp. to species level as sp. nov., proposal of sp. nov. and sp. nov., emended description of and description of sp. nov., isolated from streams and symptoms on diverse plants.

The species corresponds to a complex, including two subspecies with validly published names, two proposed subspecies and two new species, and Recent studies suggested that this complex needed revision. We examined the taxonomic status of 144 strains isolated from a wide range of plant species, various geographical origins and waterways. Sequences of the , and housekeeping genes clustered 114 of these strains together within a not yet described clade.