Question

Antiauxin is used in picking cotton balls is
A) 2,4- D
B) TIBA
C) NAA
D) Both A and B

Answer 1

Hint:- Antiauxin is a substance that resists or restrains the standard result of an auxin. Auxin is a plant hormone created in the stem tip that enhances cell elongation. Auxin shifts to the shady side of the plant, allowing the cells there to rise better than corresponding cells on the lighter side of the plant.

Complete answer:-
Triiodobenzoic Acid (TIBA) is a compound that performs as an antiauxin. It is utilized in picking cotton
balls. It is spurted on the cotton plants to defoliate. This will assist in the machine picking of cotton
balls. Anti Auxins are scattered on the cotton plants to defoliate, thus facilitating machine picking of cotton balls. These auxins are not physically found in plants. Auxin transport inhibitors are NPA-1-N-Naphthylphthalamic acid and TIBA - 2,3,5-Triiodobenzoic acid 2,4-D is an extensively used herbicide that controls broadleaf weeds that have been utilized as a pesticide. It is used in many places involving turf, lawns, rights-of-way, marine sites, forestry sites, and a selection of field, fruit, and vegetable crops. NAA is an organic compound that is monochrome solid and soluble in organic solvents.
Thus, the accurate answer is option B.

Note:- p-Chlorophenoxy Isobutyric acid (PCIB) is called a putative antiauxin and is broadly used to inhibit auxin action, even though the mechanism of PCIB-mediated inhibition of auxin action is not differentiated very well at the molecular level. Physiological analysis disclosed that PCIB inhibited lateral root production, the gravitropic retort of roots, and the growth of prime roots. These results advise that PCIB impairs the auxin-signaling pathway by regulating Aux/IAA protein stability and thus affects the auxin-regulated Arabidopsis root physiology.