Plant hormones

What are plant hormones?

chemical substances produced in small quantities in one part of an organism and then transported to another part to elicit a response

What do Brassinosteroids do?

elongation, cell division, bending of stems, delayed senescence, reproductive development

Where are brassinosteriods found?

in algae

Where are oligosaccharins found?

plant cell walls along with cellulose

What do oligosaccharins do?

attacks pathogens, sacrifices cells at infection site

Where is Ethylene found?

naturally produced in plants

What does ethylene do?

ripens fruit, stops lateral buds from forming

Where are abscisic acid found?

involved in fruit abscission in some plants

what does abscisic acid do?

growth regulation, important for dormancy, stress responses, and stomata control

Where are gibberelinns found?

in certain fungi

what do gibberellins do?

effects stem elongation, quickens seed germination

What does Auxins do?

increases plasticity of plant cell walls, elongation of stems(bends away from light)

What are the main effects of auxin?

controls plant orientation, promotes root growth and branching of roots

What do cytokinins do?

promote cytokinesis by increasing mitosis = more cells

what are the effects of cytokinin effects?

delays leaf senescence

What do strigolactones do?

helps with auxin, inhibits lateral buds

cytokinin

moves up from roots, inhibits lateral roots, promotes lateral buds

auxin

moves down from growing tip, promotes lateral roots, inhibits lateral buds

Abscises Acid

Prevents - growth, promotes - dormancy

Ethylene

helps defense fruit ripening

Oligosccharins

aid defence

brassionosteriods

have many effects

gibberellins

aid in growth nutrient use

strigolactones

stop axillary bud growth

What is phototropisms?

directional growth responses,