Microbes and Plant Diseases

Dieback disease in citrus is a well-documented physiological disorder caused specifically by a deficiency of copper (Cu) in the soil.

Heart rot in sugar beet and turnip is a classic symptom of boron deficiency, which affects cell division and structural integrity.

Lichens are plant like organisms, under a microscope the association is seen to consist of millions of cells of algae (called the phycobiont) woven into a matrix formed of the filaments of the fungus (called the mycobiont).

Ans - 2

Oropharyngeal thrush, or oral candidiasis, is a fungal infection caused by the overgrowth of Candida species, most commonly Candida albicans. Cryptococcus and Histoplasma are different types of fungi that typically cause systemic or respiratory infections.

A fungal disease of poultry is monilliasis, which mainly occurs in young and growing chicks. 

Agaricus is mushroom.

Absorptive heterotrophy is similar in both monerans and fungi.In this an organism secretes enzymes externally into its environment to digest organic materials which are then absorbed.

The cell wall of fungi is made up of chitin.The structure of chitin is comparable to the polysaccharide cellulose, forming crystalline nanofibrils .

 Puccinia graminis causes black rust of wheat.

 Mustard plant is affected by white rust of crucifers.

 Potato plant is not affected by ergot disease.

Loose smut of wheat is a common fungal disease throughout the wheat-growing regions of the world. It spreads by seeds and flowers.

Canker is a disease of tobacco plant.

Citrus canker is a disease affecting citrus species caused by the bacterium Xanthomonas.