Xanthomonas translucens

Xanthomonas translucens

Xanthomonas translucens culture on agar plate

Xanthomonas translucens is a species of bacteria that belongs to the genus Xanthomonas. It is known for causing diseases in various cereal crops, leading to significant agricultural impact. This bacterium is a Gram-negative pathogen that primarily affects wheat, barley, and other grasses.

Taxonomy

Xanthomonas translucens is part of the Xanthomonadaceae family. The genus Xanthomonas is characterized by its yellow-pigmented colonies, which is due to the production of a pigment called xanthomonadin. This genus includes several species that are pathogenic to plants.

Pathogenicity

Xanthomonas translucens is responsible for causing bacterial leaf streak in cereals. The disease manifests as translucent streaks on the leaves, which can lead to reduced photosynthesis and crop yield. The bacterium enters the plant through natural openings or wounds and spreads through rain splash and irrigation.

Symptoms

Infected plants exhibit water-soaked streaks that become necrotic over time. The lesions are often surrounded by a yellow halo, which is a characteristic symptom of Xanthomonas infections. As the disease progresses, the streaks can coalesce, leading to large areas of dead tissue.

Control and Management

Managing Xanthomonas translucens involves integrated disease management strategies. These include the use of resistant varieties, crop rotation, and sanitation practices to reduce the spread of the bacterium. Chemical control is limited, but copper-based fungicides may offer some protection.

Research

Ongoing research aims to understand the genomics and pathogenesis of Xanthomonas translucens to develop more effective control measures. Studies focus on the molecular mechanisms of infection and the identification of resistance genes in host plants.

Related pages

• Xanthomonas
• Bacterial leaf streak
• Plant pathology
• Cereal crops