Microbes and Plant Diseases

 Rust of wheat is a plant disease caused by bacteria. Yellow vein mosaic of bhindi is again a plant disease but caused by a virus. Foot and mouth disease is a viral disease, which affects cattle.Citrus canker is the disease for which the causal organism is fungi. 

This association is beneficial and is called myremecophily.

Decomposers are organisms such as bacteria & fungi that breakdown the organic matter in the dead bodies of plant and animals.

Phytoalexin is a substance that is produced by plant tissues in response to contact with a parasite and specifically inhibits the growth of that parasite.

Tiny reddish lesions occur on the upper surface of the lamina. Minute red spots occur on the upper surface of the midrib in both the directions. Later on, these become straw colored in the center with the development of black acervuli and dark reddish brown margins.

Many fungi are considered as eukaryote and cause diseases.

Correct Answer: morning

Fungi are filamentous. Their bodies consist of long, slender, thread-like structures called hyphae.

Yellow vein mosaic of okra is caused by a virus.

Late blight of potato is caused by a fungus.

Zygomycota, or zygote fungi, is a phylum of fungi. They are mostly terrestrial in habitat, living in soil or in decaying plant or animal material. Some are parasites of plants, insects, and small animals, while others form symbiotic relationships with plants. Example: Rhizopus

The columella is a sterile dome shaped structure that is found at the tip of a sporangiophore in Rhizopus.

Trichoderma viride is a fungus and a biofungicide. It is used for seed and soil treatment for suppression of various diseases that are caused by fungal pathogens.

The class Basidiomycetes includes those members that produce their basidia and basidiospores on or in a basidiocarp. Mushroom is an example.

The small branches at each septum are termed as clamp connections. It is believed that the formation of clamp connections, where they occur in the dikaryons of some species, function in ensuring that each cell is binucleate.