ch16 - commercial uses of plant hormones

state commercial use of ethene

ethene: fruit ripening

what fruits are used for fruit ripening and why

climactic fruits e.g. bananas, apples, tomatoes, since these fruits continue to ripen after being harvested  

how is ethene used for fruit ripening

fruits are picked unripe and then exposed to ethene gas which triggers ripening process

what is an advantage of using ethene for fruit ripening

reduces the likelihood of fruits reaching the market spoiled or damaged and ensures they are in ideal state to be consumed 

state a commercial use of ABA

ABA: stimulates fruit dropping by promoting abscission

what is an advantage of using ABA for fruit dropping

eases the harvesting process

state commercial uses of auxins

auxins:

production of seedless fruits

rooting powders

weed killers

how are auxins used as rooting powders

rooting powders are applied to plant cuttings and stimulate root cells to develop promoting faster growth of roots

what are weed killers used for

to get rid of broad leaved weeds

how are auxins used as weed killers

synthetic auxins are applied to broad leaved weeds which absorb it, causing accelerated and unsustainable growth leading to their death 

what is an advantage of using auxins as weedkillers

simple and cheap to use & has little toxicity to animals 

state a commercial use of gibberellins

production of seedless fruits

how are gibberellins and auxins used to produce seedless fruits

sprayed onto flowers of a plant which triggers the release of hormones produced by a developing seed > ovary of flower is consequently stimulated to grow into a fruit without the seed forming