2022-05-15T16:32:37+03:00[Europe/Moscow] en true <p>what are gibberellins</p>, <p>how does a Barley seed survive harsh conditions to germinate in good ones</p>, <p>what does a barley seed contain</p>, <p>what is the function of an embryo </p>, <p>what is an endosperm</p>, <p>what is an aleurone layer</p>, <p>what happens to a barley seed when the conditions are right</p>, <p>beginning the process of germination stimulates</p>, <p>what do gibberellins do once produced</p>, <p>how does gibberellin stimulate the synthesis of amylase</p>, <p>what is the function of the amylase synthesised by gibberellin</p>, <p>what happened to the maltose produced</p>, <p>what can the glucose eventually produced be used for</p> flashcards

A2 The Role of Gibberellin in Germination of Barley

CIE Syllabus

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  • what are gibberellins

    a type of plant growth regulator involved in controlling seed germination and stem elongation

  • how does a Barley seed survive harsh conditions to germinate in good ones

    in a state of dormancy as it contains very little water and is metabolically inactive

  • what does a barley seed contain

    an embryo

    an endosperm

    an aleurone layer

  • what is the function of an embryo

    will grow into the new plant when the seed germinates

  • what is an endosperm

    a starch-containing energy store surrounding the embryo

  • what is an aleurone layer

    a protein rich layer on the outer edge of the endosperm

  • what happens to a barley seed when the conditions are right

    it starts to absorb water to begin the process of germination

  • beginning the process of germination stimulates

    the embryo to produce gibberellins

  • what do gibberellins do once produced

    diffuse into the aleurone layer and stimulate the cells there to synthesise amylase

  • how does gibberellin stimulate the synthesis of amylase

    by regulating genes involved in the synthesis of amylase causing an increase in the transcription of mRNA coding for amylase

  • what is the function of the amylase synthesised by gibberellin

    hydrolyses starch molecules in the endosperm producing soluble maltose molecules

  • what happened to the maltose produced

    converted to glucose and transported to the embryo

  • what can the glucose eventually produced be used for

    can be respired by the embryo to provide the energy needed to grow