Plant hormones (Phytohormones)

🌟Introduction

Isn’t it fascinating that plants don’t even have a nervous system yet they are able to perform almost everything required for their survival. They can grow either Tropical or Nastic, these movement helps plant to survive by adapting to environmental changes. Lets study more about plant Hormones. 🪴 

📚Key concept:- 

🔷️There are basically 4 type of plants hormones:- 

Hormones🡪	Auxin	Gibberellins	Cytokinins	Abscisic acid
Roles🡪	Promote cell elongation, control phototropism, and gravitropism	Stimulates stem elongation, breaks seed dormancy, promote flowering.	Promote cell division, delays leaf aging (senescence)	Inhibit growth, induces dormancy in seeds, closes stomata during stress
Location🡪	Shoot tip (Apical meristem)	Young leaves and seed	Root tip(transported to other parts)	Leaves, stem, green fruits.

Balance between growth and inhibition:- 

📚Key concept:- 

🔷️The balance of growth and inhibition in plants are maintained by the interaction between different plant Hormones mainly. 

Growth hormones	Inhibitory	Balance description
For Auxin, Gibberellins and Cytokinins.	Abscisic acid	Growth hormones promotes cell elongation, division, and development. while Abscisic acid act as brake specially during stress conditions, ensuring growth doesn’t happen in unfavourable condition.
Gibberellins	Abscisic acid	Gibberellins breaks seed dormancy and promote germination.
Cytokinins	Abscisic acid	Abscisic acid promote eaf fall and aging under stress.

PYQ questions:-