What are the plant growth regulators give example?
Examples are auxins, gibberellins and cytokinins. Plant Growth Inhibitors – These chemicals inhibit growth and promote dormancy and abscission in plants.
How important are the plant growth regulators?
Plant growth regulators (PGRs) are chemicals used to modify plant growth such as increasing branching, suppressing shoot growth, increasing return bloom, removing excess fruit, or altering fruit maturity. Gibberellins: Gibberellins (GA) promote cell elongation, shoot growth, and are involved in regulating dormancy.
Which one includes growth promoters?
Auxins, gibberellins and cytokinins are the plant growth promoters perform all the metabolic processes in the different stages of plant growth. Natural growth promoters are produced by plants or stored in their seeds responsible for carrying all the biological processes and maintain plant health.
Which of the following growth regulator can fit either of the groups?
The gaseous PGR, ethylene, could fit either of the groups, but it’s largely an inhibitor of growth activities.
What are side effects of ethephon?
[16] Toxic effects of ethephon reported in human adults till date are salivation, lacrimation, diarrhea, urgency of bowel movement, stomach cramps, increased urgency, and frequency of urination with decreased appetite with inhibition of plasma cholinesterase activity.
How do plant growth regulators contain ethephon?
2-chloroethylphosphonic acid (also known as ethephon): growth regulator blocking auxin transport and releasing ethylene in the plant. The effect of this substance is to make plant cells shorter, thicker and stronger instead of elongating. Its activity is greater when temperatures are high i.e. more than 10°C to 12°C.
What are the five 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.