Plant Pathology - Study Mode
[#741] Albugo candida produces
Correct Answer
(D) Oospores
Explanation
Solution: Albugo candida produces Oospores. Albugo candida, commonly known as white rust, is a species of oomycete in the family Albuginaceae. A. candida is an obligate plant pathogen that infects Brassicaceae species and causes the disease known as white rust or white blister rust. Thick-walled sexual spores, called oospores are produced which germinate, producing either vesicle inside the plant tissue, exit tubes with vesicles at the tip, or germ tubes. Further zoospores develop inside the vesicles. The infection is spread by either oospore-infected seed or by mechanical movement of sporangia.
[#742] Who discovered satellite virus?
Correct Answer
(B) Kassanis
Explanation
Solution: Kassanis discovered satellite virus. Satellite tobacco necrosis virus (STNV) was the first satellite virus to be recognized, the term “satellite virus” being coined to denote the 18 nm isometric particles associated with the 28 nm TNV isometric particles by Kassanis, in 1962. Satellite viruses (SVs) are subviral pathogens that are entirely dependent upon the replication machinery of their helper viruses. There are only four known plant SVs, satellite tobacco necrosis virus, satellite tobacco mosaic virus, satellite panicum mosaic virus, and satellite maize white line mosaic virus.
[#743] Temporary wilting is due to
Correct Answer
(C) Respiration
Explanation
Solution: Temporary wilting is due to Respiration. Wilting from which a plant will recover by reduction of the transpiration rate and without the addition of water to the soil is temporary wilting. It occurs when the turgor pressure in non-lignified plant cells falls toward zero, as a result of diminished water in the cells.
[#744] Nobel Prize was awarded to the scientist for discovering the pathway of carbon assimilation
Correct Answer
(C) Calvin
Explanation
Solution: Nobel Prize was awarded to a scientist for discovering the pathway of carbon assimilation Calvin. Melvin Ellis Calvin was an American biochemist known for discovering the Calvin cycle along with Andrew Benson and James Bassham, for which he was awarded the 1961 Nobel Prize in Chemistry. They mapped the complete route that carbon travels through a plant during photosynthesis, starting from its absorption as atmospheric carbon dioxide to its conversion into carbohydrates and other organic compounds.
[#745] Panama disease of banana is prevented by
Correct Answer
(C) Application of lime to the soil
Explanation
Solution: Panama disease of banana is prevented by the Application of lime to the soil. Panama disease is a plant disease that infects banana plants (Musa spp.). It is a wilting disease caused by the fungus Fusarium oxysporum f. sp. cubense (Foc). The pathogen is resistant to fungicides and its control is limited to phytosanitary measures. Based on soil pH, lime is applied 100 - 150 gm per plant.