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Created page with "==Key Stage 4 Foundation== ===Meaning=== '''Plant hormones''' are chemical messengers (hormones) which affect the growth of a plant. ===About Plant Hormones=== : '''P..."
==Key Stage 4 Foundation==
===Meaning===
'''Plant hormones''' are chemical messengers ([[hormone]]s) which affect the growth of a [[plant]].
===About Plant Hormones===
: '''Plant hormones''' may cause [[Plant Cell|cells]] in the [[plant]] to elongate or divide.
: The response of a [[plant]] to [[light]] and [[gravity]], known as [[phototropism]] and [[gravitropism]], is controlled by the '''plant hormone''' [[auxin]].
==Key Stage 4 Higher==
===Meaning===
'''Plant hormones''' are chemical messengers ([[hormone]]s) which affect the growth of a [[plant]].
===About Plant Hormones===
: '''Plant hormones''' may cause [[Plant Cell|cells]] in the [[plant]] to elongate or divide.
: The response of a [[plant]] to [[light]] and [[gravity]], known as [[phototropism]] and [[gravitropism]], is controlled by the '''plant hormone''' [[auxin]].
: The [[germination]] of [[seed]]s is controlled by a group of '''plant hormones''' called [[gibberellin]]s.
: [[Gibberellin]]s also stimulate the growth of the [[plant]] [[stem]] and [[fruit]].
: The ripening of [[fruit]] is controlled by [[ethene]].
: [[Ethene]] also affects the rate of [[Cell Division|cell division]].
===Using Plant Hormones===
====Auxin====
: Gardeners use [[auxin]] to encourage cuttings of [[plant]]s to grow new [[root]]s when they are planted.
: [[Auxin]] can be used to kill [[plant]]s by causing them to grow too fast, using up their stores of [[energy]]. Since auxin is sprayed on [[leaf|leaves]], [[plant]]s with larger [[leaf|leaves]] will [[Absorb (Biology)|absorb]] more and are more likely to die.
====Gibberellins====
: Farmers use [[gibberellin]]s to cause [[seed]]s to [[germinate]]. This can help them all grow at the same time, making it easier to harvest them all at once.
: [[Gibberellin]]s are also used to make [[fruit]] grow faster.
====Ethene====
: To make [[fruit]] last longer they are harvested before they are ripe. When the farmer wants to sell them they put [[ethene]] [[gas]] in their container causing them to ripen.
===Meaning===
'''Plant hormones''' are chemical messengers ([[hormone]]s) which affect the growth of a [[plant]].
===About Plant Hormones===
: '''Plant hormones''' may cause [[Plant Cell|cells]] in the [[plant]] to elongate or divide.
: The response of a [[plant]] to [[light]] and [[gravity]], known as [[phototropism]] and [[gravitropism]], is controlled by the '''plant hormone''' [[auxin]].
==Key Stage 4 Higher==
===Meaning===
'''Plant hormones''' are chemical messengers ([[hormone]]s) which affect the growth of a [[plant]].
===About Plant Hormones===
: '''Plant hormones''' may cause [[Plant Cell|cells]] in the [[plant]] to elongate or divide.
: The response of a [[plant]] to [[light]] and [[gravity]], known as [[phototropism]] and [[gravitropism]], is controlled by the '''plant hormone''' [[auxin]].
: The [[germination]] of [[seed]]s is controlled by a group of '''plant hormones''' called [[gibberellin]]s.
: [[Gibberellin]]s also stimulate the growth of the [[plant]] [[stem]] and [[fruit]].
: The ripening of [[fruit]] is controlled by [[ethene]].
: [[Ethene]] also affects the rate of [[Cell Division|cell division]].
===Using Plant Hormones===
====Auxin====
: Gardeners use [[auxin]] to encourage cuttings of [[plant]]s to grow new [[root]]s when they are planted.
: [[Auxin]] can be used to kill [[plant]]s by causing them to grow too fast, using up their stores of [[energy]]. Since auxin is sprayed on [[leaf|leaves]], [[plant]]s with larger [[leaf|leaves]] will [[Absorb (Biology)|absorb]] more and are more likely to die.
====Gibberellins====
: Farmers use [[gibberellin]]s to cause [[seed]]s to [[germinate]]. This can help them all grow at the same time, making it easier to harvest them all at once.
: [[Gibberellin]]s are also used to make [[fruit]] grow faster.
====Ethene====
: To make [[fruit]] last longer they are harvested before they are ripe. When the farmer wants to sell them they put [[ethene]] [[gas]] in their container causing them to ripen.