Regulation of Ku gene promoters in Arabidopsis by hormones and stress

Wen-Chi Chang, Yung Kai Wang, Pei Feng Liu, Yu Fang Tsai, Lih Ren Kong, Chi Kai Lin, Chang Hsien Yang, Rong Long Pan

研究成果: Article同行評審

2 引文 斯高帕斯(Scopus)

摘要

The Ku70/Ku80 heterodimer plays a crucial role in non-homologous end-joining during DNA repair, and is also involved in multiple cellular processes such as telomere maintenance, transcription, and apoptosis. In this study, we investigate the regulation of AtKu genes in higher plants. Promoters of the AtKu70 and AtKu80 were isolated from Arabidopsis and their activities characterised using GUS reporter constructs. AtKu promoter activities were relatively higher in hypocotyls and cotyledons upon germination and in stigma and siliques as well at their early developing stages. Furthermore, AtKu promoter activities could be enhanced by gibberellic acid, auxins, and jasmonic acid, but repressed by abscisic acid, salicylic acid, heat, drought and cold, respectively. Deletion analysis demonstrates minimal lengths of ∼400 bp and 600 bp upstream of transcription start site for functional promoters of AtKu70 and AtKu80, respectively. Taken together, expressions of Ku genes are regulated both by developmental programs as well as by plant hormones and environmental stresses.

原文English
頁(從 - 到)265-280
頁數16
期刊Functional Plant Biology
35
發行號4
DOIs
出版狀態Published - 2008 六月 11

All Science Journal Classification (ASJC) codes

  • 農學與作物科學
  • 植物科學

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