Question

write a short note on growth regulators and discuss the role of tropic movement in control and cordination in plants

Answer 1

Hey mate ,

Plant growth regulators (also called plant hormones) are numerous chemical substances that profoundly influence the growth and differentiation of plant cells, tissues and organs. Plant growth regulators function as chemical messengers for intercellular communication . There are currently five recognized groups of plant hormones: auxins, gibberellins, cytokinins, abscisic acid (ABA) and ethylene. They work together coordinating the growth and development of cells. Ethylene is mainly involved in abscission and flower secscence in plants and is rarely used in plant tissue culture. In addition to the five principal growth regulators, two other groups sometimes appear to be active in regulating plant growth, the brassinosteroids and polyamines. 
Some example are - Auxins , Cytokinins , Gibberellins , Abseisic , Acid and Ethylene.


Hope it help!!

Answer 2

Answer:

Some of the plant growth regulators are auxins, cytokines an abscisic acid, the role of tropic moment in control and coordination of plants is the phototropism and geotropism.  

Explanation:

The plant growth regulators are responsible for their growth such as the auxins help in the plants moment towards light, the gibberellins help in the growth and differentiation of the cells. The growth control and coordination of activities happen with the help of these hormones.