Question

A chemical believed to be involved in flowering
A. Gibberellin
B. Kinetin
C. Florigen
D. IBA

Answer 1

Hint:-For their development and growth, plants need light, water, oxygen, minerals, and other nutrients. In addition to these external requirements, plants often depend on certain organic compounds to trigger, regulate, and monitor plant growth. These are termed ‘Plant Growth Regulators’ or ‘Plant Growth Hormones’ commonly.

Complete Answer:-There are various types of plant growth regulators, also known as phytohormones.
- Gibberellin - There are over 100 known gibberellins. In nature, they are acidic. These are present in higher plants and fungi. Some of its functions include: senescence delay, induce parthenocarpy, stem elongation, break seed dormancy.
- Kinetin –It is a synthetic cytokinin that plays a significant role in the process of cytokinesis. In plants where rapid cell division occurs, cytokinin is naturally synthesised, such as root apices, shoot buds, young fruits, etc. Basipetal and polar movement of cytokinin.
- Florigen – Florigen is a systemic signal in plants that initiates flowering. It is synthesised in leaves and transported to the apical meristem shoot where floral transformation is encouraged. It is known that it is graft-transmissible, and even among species functions.
- IBA – Indole-butyric acid is IBA, kind of like an auxin. Auxin means "to be able to grow." In agricultural and horticultural practice, they are widely used. They are found in roots and stems in growing apices and then migrate to other parts to act.

So, the correct answer is Florigen, option (C).

Note:- Ethylene is a gaseous plant hormone as well as an inhibitor. It functions as a growth promoter. In the maturing fruit and tissues experiencing senescence, it is synthesised. Many physiological procedures and one of the most commonly used hormones in agriculture are regulated.