Question

Morphogenesis in the plant is controlled by
(a)Auxin
(b)Gibberellin
(c)Cytokinins
(d)Both A and C

Answer 1

Hint: It plays an important role in the growth and differentiation of cultured cells and tissues. There are many classes of plant growth regulators utilized in culture media. It is a phytohormone produced within the stem tip that promotes cell elongation.

Complete answer:
In terms of morphogenesis, morphe means to shape and genesis means creation. So morphogenesis is defined because the organic process that causes an organism to develop its shape. In plants, development happens during cell division, cell extension, and cell separation. The auxin produced by the apical bud (or growing tip) diffuses downwards and inhibits the event of ulterior lateral bud growth, which might otherwise compete with the apical tip for light and nutrients. Likewise, cytokinin animates morphogenesis (shoot inception/bud arrangement) in tissue culture.

Additional information
The Auxins facilitate cell division and root differentiation. Auxins induce cellular division, cell elongation, and formation of callus in cultures. For example, 2,4-dichlorophenoxy ethanoic acid is one of the foremost commonly added auxins in plant cell cultures. Cytokinins induce cell division and differentiation. Cytokinins advance RNA synthesis and invigorate protein and compound exercises in tissues. The foremost frequently used cytokinins in plant cell cultures are the Kinetin and benzyl-aminopurine.

So the correct answer to the above question is ‘Both A and C’.

Note: Auxin maintains this dormancy. However long adequate auxin is created by the apical meristem, the lateral buds stay dormant. If the apex of the shoot is removed (by a browsing animal or a scientist), the auxin is not any longer produced. This will cause the lateral buds to interrupt their dormancy and start to grow. In effect, the plant becomes bushier. When a gardener trims a hedge, they're applying apical dominance.