Which of the following enhances or induces fusion of protoplasts?
Sodium chloride and potassium chloride
Polyethylene glycol and sodium nitrate
IAA and kinetin
IAA and kinetin
B.
Polyethylene glycol and sodium nitrate
Polyethylene Glycol (PEG) and sodium nitrate enhances fusion of protoplasts (protoplast fusion). Protoplast fusion is a physical phenomenon which occurs due to the fusion of protoplast (cell without cell wall) of two or more cells. It can be done by mechanically (spontaneous) or inducing agents.
(i) Spontaneous agents Mechanical fusion
(ii) Inducing agents (i) NaNO3 treatment.
(iii) High pH or Ca2+ treatment.
(iv) PEG treatment
(v) Electrofusion.
'Himgiri' developed by hybridization and selection for disease resistance against rust pathogens is a variety of
Maize
sugarcane
wheat
wheat
An organism used as a biofertilizer for raising soybean crop is
Azospirillum
Rhizobium
Nostoc
Nostoc
'Jaya' and 'Ratna' developed for green revolution in India are the varieties of
rice
wheat
Consider the following statements ( I - IV) about organic farming.
I. Utilises genetically modified crops like Bt cotton
II. Uses only naturally produced inputs like compost.
III. Does not use pesticides and urea
IV. Produces vegetables rich in vitamins and minerals.
(II), (III) and (IV)
(III) and (IV) only
(II) and (III) only
(II) and (III) only
