16.5 Commercial use of plant hormones Flashcards
which hormone is used to control fruit ripening?
ethene
how does ethene control fruit ripening?
a peak in ethene production triggers a series of chemical reactions which leads to a greater respiration rate
why is fruit ripening done?
it allows entire batches of fruit to be ripe at the same time which means easier supply of ripened fruit
it allows for fruit to be put on the shelf at the same time
allows fruit to grow for longer periods of time
prevents waste of fruit
what hormone is involved in the use of rooting powder?
auxin
how does rooting powder with cuttings work?
it increases the chance of roots forming in new plants from cuttings
why is rooting powder with cuttings used?
it makes it easier for horticulturists to develop and sell cuttings
what hormone is used in weedkiller?
auxin
why are weeds a problem in agriculture?
they grow and compete for light, space, water and minerals with crop plants
how does auxin work in weedkiller?
auxin leads to the growth rate in weeds to increase exponentially leadinf to unsustainable growth and death
as the weedkiller is selective it does not effect the crop plants
how can auxin be used commercially?
root powder and cuttings
hormonal weedkillers
seedless fruit
how can ethene be used comercially?
fruit ripening control
promote fruit droppings
how are gibberellins used commercially?
used to delay fruit ripening and ageing which improves the size and shape of fruits
