Question

Functions of plant growth promoters and plant growth inhibitors are given here in a jumbled up manner. Select the option that correctly segregates these functions.

(i)Cell division	(ii)Cell enlargement
(iii)Pattern formation	(iv)Tropic growth
(v)Flowering	(vi)Fruiting
(vii)Seed germination	(viii)Response to wounding
(ix)Response to stresses of biotic and abiotic origin	(x)Dormancy

	Functions of growth promoters	Functions of Growth inhibitors
(a)	(i),(ii),(Vii),(iX)	(iii),(iv),(v),(vi),(viii),(x)
(b)	(Viii),(ix),(x)	(i),(ii),(iii),(iv),(v),(vi),(vii),
(c)	(i),(ii),(iii),(iv),(v),(vi),(vii)	(viii),(ix),(x).
(d)	(i),(ii),(iii),(iv),(v),(vi),(vii),(ix),(x)	(Viii)

Answer 1

Hint: The plant growth promoters help in the incrementing of growth of the plant while an inhibitor reduces or decreases the growth of the plant by producing suitable hormones respectively. Both types of hormones are required by the plant.

Complete answer:
Plant Growth Hormones (PGRs) or phytohormones are the organic substances which are synthesised in minute quantities in one part of the plant body and transported to a different part where they Influence specific physiological processes (Went and Thimann,1937). PGRs are broadly divided into two groups-plant growth promoters and plant growth inhibitors. Plant growth promoters perform growth-promoting activities like cellular division, cell enlargement pattern formation, tropic growth, flowering, fruiting and seed formation. they're three in number viz., auxins, gibberellins and cytokinins. Plant growth inhibitors have important functions in inducing plant responses to wounding, biotic and abiotic stresses, dormancy and abscission. Abscisic acid is understood as a plant growth inhibitor. Ethylene is essentially a plant growth inhibitor but is additionally involved in some growth promotion activities.

So, the correct answer is, “(i),(ii),(iii),(iv),(v),(vi),(vii) are growth promoters and (viii),(ix) and (x) are growth inhibitors.

Note: -Two types of plant growth hormones called promoters and Inhibitors.
-Auxins, Gibberellins, and Cytokinins are grouped into Plant growth promoters while Abscisic acid and Ethylene are grouped into Plant growth inhibitors.
-Ethylene can be grouped either into the promoters or into the plant inhibitors.