plant hormones and their functions

 plant hormones and their functions

Plant hormones, also known as growth regulators (PGRs), are chemical messengers that regulate a plant's growth, development, and response to environmental stimuli. Here are some plant hormones and their functions: 

Auxins

Promote cell growth and differentiation, especially in the tips of plants. Auxins also control a plant's response to light. 

Cytokinins

Promote cell division and lateral growth in plants. They also help in the rapid division of seeds and fruits. 

Gibberellins

Help in breaking dormancy in seeds and buds. They can also be used in the production of seedless fruits. 

Abscisic acid

Promotes dormancy in seeds and buds. It also promotes wilting and falling of leaves. 

Ethylene

Promotes fruit ripening. 

Brassinosteroids

Promote cell elongation and division, which contributes to plant growth and development. They also enhance a plant's tolerance to heat, cold, and salinity. 

Nitric oxide (NO)

Serves as a signal in hormonal and defense responses. These responses include stomatal closure, root development, germination, nitrogen fixation, cell death, and stress response. 

Triacontanol

A fatty alcohol that acts as a growth stimulant, especially initiating new basal breaks in the rose family.