plant responses Flashcards

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1
Q

name the uses of auxin in commercial use

A

herbicides

cuttings

micropropagation

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2
Q

elaborate on the use of auxin in commercial use as a herbicide

A

stimulates shoot growth (resource using) and inhibits root growth (no resource absorbing) which causes the plant to rapidly grow and exhaust

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3
Q

elaborate on the use of auxin in commercial use in micropropagation

A

removal of meristems from plant and place in growth medium

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4
Q

how are cuttings grown

A

cut at lateral buds

cuttings dipped in rooting powder (auxin)

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5
Q

how does auxin herbicide affect narrow-leaf plant

A

little effect

has little biomass so uses less resouces than broad-leaf plant

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6
Q

why do we grow cuttings

A

able to clone a plant with desirable traits

saves growing from seed

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7
Q

why do farmers prefer to kill weeds

A

prevent competition and increase yield
(weeds take up mineral ions and water)

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8
Q

why are synthetic molecules not favourable

A

not organic and not the exact molecule

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9
Q

what are the uses of gibberellins

A

seed germination

stem growth

delay senescence - synergetic with auxin

improve shape - charge more

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10
Q

what are the uses of ethene

A

speeds up ripening - reduces auxin which stops inhibition of ethene, causing ripening

promote fruit drop

promote female sex expression in cucumbers

promote lateral growth

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11
Q

why is lateral growth favourable to farmers

A

plants sprout more and longer branches, so there will be more flowering buds from which fruit grow

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12
Q

what is a con of ethene

A

gaseous so can’t control its concentration and don’t know if it’s been evenly distributed across a plant

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13
Q

what are the uses of cytokinins

A

prevent yellowing

promote cell division and elongation

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14
Q

define synergy

A

some hormones amplify each other’s effects

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