Effect of Delay in Anterior or Posterior Amputation on Regeneration of Short Fragments of Planaria(Developmental Biology)

概要

論文の詳細を見る
Regeneration of fragments obtained by two transverse amputations, with the second amputation being delayed for various periods of time after the first, was examined in the freshwater planarian Dugesia japonica. When the two amputations were performed simultaneously, all of the fragments isolated from pre- and postpharyngeal regions regenerated as normal worms. However, when the second amputation was performed later than the first, a delay from 12 hours to 3 days occasionally caused the reversal of axial polarity and the regeneration of bipolar heteromorphs. In the first group, which consisted of fragments in which the anterior amputation was performed later than the posterior one, bipolar tails were obtained predominantly and the incidence of such regenerates increased considerably with a delay of 1 to 2 days, with the exception of cases in which bipolar heads were formed on the fragments isolated from the prepharyngeal region. In the second group, which consisted of fragments in which the posterior amputation was performed later than the anterior one, bipolar heads were obtained, and their incidence also increased considerably with a delay of 1 to 2 days between amputations. However, when the second amputaiton was delayed for more than four days, no bipolar heteromorphs were obtained in either group. Based on these results, a discussion is presented on the role of the anterior and posterior cut ends of a regenerating fragment in body patterning.
社団法人日本動物学会の論文
1992-06-15

Effect of Delay in Anterior or Posterior Amputation on Regeneration of Short Fragments of Planaria(Developmental Biology)

スポンサーリンク

概要

著者

関連論文

スポンサーリンク