Question

Cycocel is a ………….
(a) Wound hormone
(b) Growth hormone
(c) Rhizocaline necessary for root formation
(d) Growth retardant

Answer 1

Hint: They have been called the "most important inhibitor of gibberellin biosynthesis. They’re a colorless hygroscopic crystalline substance that's soluble in water and ethanol. They’re an alkylating agent and a quaternary ammonium salt.

Complete answer:
Cycocel is a plant growth regulator which is  growth retardant, which are natural or synthetic chemical substances that are directly applied to crops to change some structural processes. It’s expected that these alterations modify hormonal balance and growth resulting in increased yield, improved crop quality, or facilitated harvesting. Cycocel inhibits gibberellin biosynthesis through blocking ent-kaurene synthesis within the metabolic pathway of gibberellin manufacturing, leading to decreased amounts of active gibberellin and the resulting reduction in stem elongation.

Additional information:
Cycocel is a plant growth regulator for ornamentals, containing bedding plants and herbaceous crops. Cycocel enhances the crop’s aesthetic application and improves endurance throughout post-production shipping and handling. Treated crops are denser with shorter internodes, tough stems, and greener leaves.
Advantages of Cycocel are:
- Forgiving PGR is easy to utilize through experienced and new growers on all labeled crops. - Increase crop aesthetic appeal and enhance durability throughout shipping. - Contains a surface-active agent. - Synergistic with B-Nine. - Labelled to be used in a good range of crops.
So, the correct answer is ‘(d) Growth retardant’.

Note: Cycocel as an artificial growth retardant has been recommended for wheat since the 1960s. Cycocel is among the foremost committed and vastly utilized plant growth regulators on the market present day. Cycocel could also be utilized on any crop within the greenhouse or nursery comprising but not limited to, poinsettias, hibiscus, azaleas, and geraniums to decrease stem elongation, produce early flowering, enhancing flowering, and to supply condense plants with multiple buds per shoots.