Planta

, Volume 211, Issue 5, pp 632–640

Expression of cell cycle regulatory genes and morphological alterations in response to salt stress in Arabidopsis thaliana

  • Sylvia Burssens
  • Kristiina Himanen
  • Brigitte van de Cotte
  • Tom Beeckman
  • Marc Van Montagu
  • Dirk Inzé
  • Nathalie Verbruggen

DOI: 10.1007/s004250000334

Cite this article as:
Burssens, S., Himanen, K., van de Cotte, B. et al. Planta (2000) 211: 632. doi:10.1007/s004250000334

Abstract.

 Hyperosmotic stress severely affects plant growth and development. To examine the effect of salt stress on cell cycle activity in Arabidopsis thaliana (L.) Heynh., the transcriptional regulation of a cyclin-dependent kinase, CDC2aAt, and two mitotic cyclins, Arath;CycB1;1 and Arath;CycA2;1, was studied by using the β-glucuronidase (gus) reporter gene. Moreover, the mRNA abundance of these cell cycle genes as well as CDC2bAt were monitored during salt stress. Upon NaCl treatment, the promoter activities and transcript levels of all cell cycle genes diminished initially in the shoot apex and were subsequently induced during salt-stress adaptation. Additionally, the promoter activities of CDC2aAt and CycA2;1 decreased in the vascular cylinder of the root in correlation with reduced lateral root formation. In the root tips, a regression of CDC2aAt, CycA2;1, and CycB1;1:gus expression was observed, concomitant with a shrinkage of the root meristem and inhibition of root growth. Our data indicate that salt stress interferes with cell cycle regulation at the transcriptional level, resulting in an adaptive growth response.

Key words: Arabidopsis (cell cycle) – Cyclin-dependent kinases –β-Glucuronidase – Mitotic cyclins – Salt stress 

Copyright information

© Springer-Verlag Berlin Heidelberg 2000

Authors and Affiliations

  • Sylvia Burssens
    • 1
  • Kristiina Himanen
    • 1
  • Brigitte van de Cotte
    • 1
  • Tom Beeckman
    • 1
  • Marc Van Montagu
    • 1
  • Dirk Inzé
    • 1
  • Nathalie Verbruggen
    • 1
  1. 1.Vakgroep Moleculaire Genetica en Departement Plantengenetica, Vlaams Interuniversitair Instituut voor Biotechnologie, Universiteit Gent, K.L. Ledeganckstraat 35, 9000 Gent, BelgiumBE

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