Gibberellins

• give an example of a endospermic seed

  maize
• What is gibberellin?


  A plant growth hormone which stimulates seed germination
• when is gibberellin initially released

  after water is imbibed thought he micropyle
• Where is gibberellin released from

  the embryo
• what happens once the gibberellin is released from the embryo

  it will diffuse to the aleurone layer
• What do gibberellins stimulate?

  transcription and translation
• what will gibberellins stimulation transcription and translation lead to

  the production of hydrolytic enzymes
• what are two examples of hydrolytic enzymes

  protease and amylase
• What are hydrolytic enzymes?


  enzymes capable of breaking down materials either inside the bacterial cell or in its environment.
• what is protease used for in germination

  the digestion of the proteins in the aleurone layer to form amino acids
• what are proteins broken down by and into what

  by protease into amino acids
• what does protease breaking down the aleurone layer into amino acids lead to

  further enzyme synthesis
• what is amylase used for in germiantion

  it will diffuse into the endosperm and hydrolyse the starch stored there
• what is starch broken down by and what into

  by amylase into maltose
• what other nutrients are used for aerobic respiration in the embryo

  maltose and glucose will diffuse into the embryo
• what does aerobic respiration lead to

  the growth of the plumule and radicle
• in what vessels are the soluble products transported in the plumule and radicle

  the phloem
• what can glucose be used for in plants

  for respiration or it can be converted into cellulose for cell wall production
• in which way does the plumule grow

  towards light and against gravity
• in which way does the radicle grow

  against light and towards gravity
• what is the aleurone layer

  a protein layer found in monocotyledon seeds which is digest to provide amino acids for photosynthesis