Fungi and Lichens Biology

Aspergillus niger is the primary fungus used for industrial production of gluconic acid through glucose oxidation. Saccharomyces is used for ethanol production. Rhizopus produces organic acids like fumaric and lactic. Lycoperdon is a puffball genus not used in industrial fermentation.

Blast disease of rice is caused by the fungus Pyricularia oryzae (also called Magnaporthe oryzae), which is one of the most devastating rice pathogens. Alternaria solani affects potatoes/tomatoes, Entyloma oryzae causes smut disease, and Helminthosporium oryzae causes brown spot but not blast.

 Agaricus is a genus of mushrooms containing both edible and poisonous species

 Apple scab is caused by Venturia inequalis.The disease manifests as dull black or grey-brown lesions on the surface of tree leaves, buds or fruits.

Isidia are vegetative propagules found in lichens. They are small, outgrowths of the thallus containing both the photobiont and mycobiont, which break off to form new lichens.

It is causad by Colletotrichum fulcatum

The fungal component (mycobiont) of most lichens belongs to the Ascomycetes, though some lichens involve Basidiomycetes or Deuteromycetes.

Gametangial copulation, where two gametangia fuse to form a zygospore, is a characteristic feature of Mucorales, such as Mucor.

In some yeasts, when buds do not separate from the parent cell, they form a chain of cells that resembles a mycelium, known as pseudomycelium.

Amanita is a genus of fungi that includes several highly poisonous species, such as the Death Cap (Amanita phalloides).

The photobiont in lichens is typically a photosynthetic organism, which is either a green alga or a cyanobacterium (blue-green alga).

The gills of Agaricus are composed of the trama, subhymenium, and hymenium. The stipe is the stalk of the mushroom, not a part of the gill structure.

In fungi such as Mucor, the specialized hyphal branches that fuse during sexual reproduction to form gametangia are known as progametangia. These structures precede the formation of the actual gametangia. Hence, option C is correct.

Erysiphe graminis (often referred to as Erysiphe graminicola in some older texts) is the fungus responsible for powdery mildew of cereals.

Pythium debaryanum is a well-known soil-borne pathogen that causes 'damping off' disease in seedlings.

A universal veil is a membrane that encloses the entire developing fruit body of certain mushrooms, such as those in the genus Amanita.

Agaricus (the common mushroom) has a distinct basidiocarp consisting of a pileus (cap) supported by a stipe (stalk).

Chlamydospores are thick-walled resting spores. Synchytrium typically produces resting sporangia, not chlamydospores, making this the mismatched pair.

Griseofulvin is a well-known antifungal medication used to treat fungal infections of the skin and nails.

Pleurotus is a well-known genus of mushrooms that includes species capable of bioluminescence. While other fungi may exhibit this trait, Pleurotus is the primary example among the choices provided.

Endocarpon miniatum is commonly referred to as the stone mushroom or rock lichen due to its growth habit on rocks. Other options refer to different lichen species.

Helotism refers to the relationship in lichens where the fungus acts as a master and the alga as a slave, which is essentially a form of controlled parasitism. The fungus benefits at the expense of the alga, though it is often described as a mutualistic symbiosis.

The zygosporangium of Rhizopus does not contain a columella; the columella is a structure found in the sporangium, not the zygosporangium. Therefore, the statement claiming it contains a columella is false.

Schizosaccharomyces octosporus, like many yeasts, spends the majority of its life cycle in the haploid state, undergoing meiosis immediately after zygote formation. This characterizes a haplontic life cycle.