Plant Hormones (AQA GCSE Biology): Flashcards
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13 cards from this deck
What do plant hormones do?
What do plant hormones do?
Coordinate and control growth
Phototropism definition
Phototropism definition
Response to light
Gravitropism/geotropism definition
Gravitropism/geotropism definition
Response to gravity
What is auxin?
What is auxin?
A plant hormone
What is positive phototropism?
What is positive phototropism?
Plants grow towards light source
Where does auxin move in phototropism?
Where does auxin move in phototropism?
To the shaded side of the shoot
Auxin effect on shoot cells
Auxin effect on shoot cells
Stimulates cells to grow more
What is negative gravitropism?
What is negative gravitropism?
Shoots grow away from gravity
Auxin effect in roots
Auxin effect in roots
Cells grow more on side with less auxin
What is positive gravitropism?
What is positive gravitropism?
Roots grow towards gravity
What happens with equal auxin distribution?
What happens with equal auxin distribution?
Plant grows straight in that direction
Function of gibberellins
Function of gibberellins
Stimulate seed germination
Function of ethene
Function of ethene
Cell division and ripening of fruits