Nitrite reductase will convert nitrite to ammonium. There are two types of nitrite reductase characteristics given below;

a) Both nitrite reductase consist of a single 63kD polypeptide

b) In leaf chloroplasts and root plastids contain different forms of the nitrite reductase enzyme

c) In shoot nitrite reductase directly dependent on the light reaction by the ferredoxin, it activates nitrite reductase in choloroplast

d) NADPH in the roots is provided by pentose phosphate pathway, it also activate nitrite reductase in the plastids

Which of the correct statement about nitrite reductase characteristics?

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#Question id: 37969

#Plant Biotechnology

Statement I: Cold treatment (3–6°C) helps in retarding the aging of the anther wall, thereby allowing more microspores to switch from gametophytic to sporophytic development.

Statement II: Maize responds best to standard cold treatment temperatures of 3–6°C rather than higher temperatures like 14°C

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#Question id: 37970

#Plant Biotechnology

Statement I: Hot treatment (e.g., 30°C for 24h) in Brassica stimulates embryogenesis by causing the dissolution of microtubules and displacement of the spindle.

Statement II: This thermal shock leads to normal division of the microspore nucleus.

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#Question id: 37971

#Plant Biotechnology

Statement I: Ethrel (2-chloroethylphosphonic acid) treatment increases haploid production by inducing multinucleated pollen grains.

Statement II: Pollen grains induced by Ethrel treatment are characterized by having a high density of starch grains.

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#Question id: 37972

#Plant Biotechnology

Statement I: Commitment to androgenesis is achieved mainly by the overexpression of pollen maturation ('late') genes.

Statement II: In wheat, the synthesis of a metallothionein-like protein during induction is regulated by Abscisic Acid (ABA).

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#Question id: 37973

#Plant Biotechnology

Statement I: In cereal species like rice and wheat, modifying the medium composition can determine whether the cell mass forms an embryo or a callus.

Statement II: The formation of a callus versus a globular embryo is strictly dependent on the temperature and cannot be influenced by the species type.

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#Question id: 37974

#Plant Biotechnology

Which of the following phenomena is primarily responsible for the wide variation in ploidy levels observed in plants regenerated from anther or microspore culture?