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Explain the pathogenesis and disease management of citrus canker disease in plan...

Dec 13, 2023

Explain the pathogenesis and disease management of citrus canker disease in plants

Answer

Citrus canker is a bacterial disease that affects the epidermal tissues of citrus plants, leading to lesions and fruit drop, and is managed through a combination of cultural practices, chemical treatments, and resistant varieties.

Solution

Pathogenesis of citrus canker involves infection by the bacterium Xanthomonas citri subsp. citri

The bacteria enter through stomata or wounds, multiply, and cause raised corky lesions on leaves, fruit, and stems

Disease management includes:

Cultural practices such as pruning infected branches and avoiding the spread through contaminated tools

Chemical treatments with copper-based bactericides to reduce bacterial spread

Planting resistant citrus varieties to reduce the incidence of the disease

Key Concept

Citrus canker pathogenesis and management

Explanation

Citrus canker is caused by a bacterium that infects citrus plants, leading to lesions and fruit drop. Management strategies include cultural practices, chemical treatments, and the use of resistant varieties to prevent and control the disease.

Explain the pathogenesis and disease control management of crown gall disease occurring in vascular plants

Answer

Crown gall disease is a plant condition caused by the bacterium Agrobacterium tumefaciens, leading to tumor-like growths. Disease control management involves preventive measures, cultural practices, and genetic resistance.

Solution

Pathogenesis of crown gall disease involves the infection of wounded plant tissue by Agrobacterium tumefaciens

The bacterium transfers part of its DNA (T-DNA) into the plant's genome, causing uncontrolled cell division and tumor formation

Disease control management includes:

Preventive measures such as avoiding injury to plants, which can serve as entry points for the bacteria

Cultural practices like proper pruning, sterilization of tools, and removal of infected plant material to prevent spread

Use of genetically resistant plant varieties and biological control agents to reduce the incidence of the disease

Key Concept

The key concept in understanding crown gall disease is the interaction between Agrobacterium tumefaciens and plant cells, leading to genetic transformation and tumor formation.

Explanation

Crown gall disease is caused by the integration of bacterial DNA into the plant genome, which disrupts normal cell growth. Control strategies focus on prevention, cultural practices, and the use of resistant plant varieties to manage the disease.