<P> Gibberellins are involved in the natural process of breaking dormancy and other aspects of germination . Before the photosynthetic apparatus develops sufficiently in the early stages of germination , the stored energy reserves of starch nourish the seedling . Usually in germination , the breakdown of starch to glucose in the endosperm begins shortly after the seed is exposed to water . Gibberellins in the seed embryo are believed to signal starch hydrolysis through inducing the synthesis of the enzyme α - amylase in the aleurone cells . In the model for gibberellin - induced production of α - amylase , it is demonstrated that gibberellins ( denoted by GA ) produced in the scutellum diffuse to the aleurone cells , where they stimulate the secretion α - amylase . α - Amylase then hydrolyses starch , which is abundant in many seeds , into glucose that can be used in cellular respiration to produce energy for the seed embryo . Studies of this process have indicated gibberellins cause higher levels of transcription of the gene coding for the α - amylase enzyme , to stimulate the synthesis of α - amylase . </P>
<P> Gibberellins are involved in the natural process of breaking dormancy and other aspects of germination . Before the photosynthetic apparatus develops sufficiently in the early stages of germination , the stored energy reserves of starch nourish the seedling . Usually in germination , the breakdown of starch to glucose in the endosperm begins shortly after the seed is exposed to water . Gibberellins in the seed embryo are believed to signal starch hydrolysis through inducing the synthesis of the enzyme α - amylase in the aleurone cells . In the model for gibberellin - induced production of α - amylase , it is demonstrated that gibberellins ( denoted by GA ) produced in the scutellum diffuse to the aleurone cells , where they stimulate the secretion α - amylase . α - Amylase then hydrolyses starch , which is abundant in many seeds , into glucose that can be used in cellular respiration to produce energy for the seed embryo . Studies of this process have indicated gibberellins cause higher levels of transcription of the gene coding for the α - amylase enzyme , to stimulate the synthesis of α - amylase . </P>
gibberellins are naturally produced in which part of a plant
gibberellins are naturally produced in which part of a plant
the seed embryo
the seed embryo