Amyloplast distribution in hairy roots induced by infection with Agrobacterium rhizogenes.

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  • Young-Soon Kim
    Department of Biological Sciences, Chonbuk National University, Chon ju 561 -756, Korea
  • Soh Woong-Young
    Department of Biological Sciences, Chonbuk National University, Chon ju 561 -756, Korea

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  • Amyloplast distribution in hairy Roots

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Abstract

To elucidate the rapid and plagiotropic growth of hairy root induced by A. rhizogenes, a root apex was investigated with respect to it's amyloplast deposition, activity of α-amylase and glucose content. The amyloplasts distributed in the hairy roots were fewer than those of the adventitious root. Since auxin availability is enhanced in hairy roots, it could affect the statolith degradation by elevating α-amylase activity so that the energy requirement for rapid growth could be fulfilled as represented of glucose content. Consequently,it is suggested the overall decrease of starch grains could result in the lack of gravi-response in hairy roots.

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