Acta Physiologiae Plantarum

, 30:679

Influence of long-term drought stress on osmolyte accumulation in sugar beet (Beta vulgaris L.) plants

  • Danuta Chołuj
  • Romualda Karwowska
  • Agnieszka Ciszewska
  • Marta Jasińska
Original Paper

DOI: 10.1007/s11738-008-0166-2

Cite this article as:
Chołuj, D., Karwowska, R., Ciszewska, A. et al. Acta Physiol Plant (2008) 30: 679. doi:10.1007/s11738-008-0166-2

Abstract

Accumulation of various osmolytes was examined in plants of sugar beet cv. Janus grown under two soil water treatments: control (60% of the field water capacity; FWC) and drought (30–35% FWC). The water shortage started on the 61st day after emergence (DAE), at the stage of the beginning of tap-roots development and was imposed for 35 days. Osmotic potential of sugar beet plant organs, particularly tap-roots, was decreased significantly as a consequence of a long-term drought. Water shortage reduced univalent (K+, Na+) cations concentrations in the petioles and divalent (Ca2+, Mg2+) ions level in the mature and old leaves. Cation concentrations in the tap-roots were not affected by water shortage. The ratio of univalent to divalent cations was significantly increased in young leaves and petioles as a consequence of drought. Long-term water deficit caused a significant reduction of inorganic phosphorus (Pi) concentration in young and old leaves. Under the water stress condition, the concentration of proline was increased in all individual plant organs, except proline concentration in the youngest leaves. Drought treatment caused a significant increase of glycine betaine content in shoot without any change in tap-roots. Glucose concentrations were significantly increased only in tap-roots as the effect of drought. In response to water shortage the accumulation of sucrose was observed in all the examined leaves and tap-roots. Overall, a long-term drought activated an effective mechanism for osmotic adjustment both in the shoot and in the root tissues which may be critical to survival rather than to maintain plant growth but sugar beet organs accumulate different solutes as a response to water cessation.

Keywords

Beta vulgarisOsmotic adjustmentWater stress

Copyright information

© Franciszek Górski Institute of Plant Physiology, Polish Academy of Sciences, Kraków 2008

Authors and Affiliations

  • Danuta Chołuj
    • 1
  • Romualda Karwowska
    • 1
  • Agnieszka Ciszewska
    • 1
  • Marta Jasińska
    • 1
  1. 1.Department of Plant Physiology, Faculty of Agriculture and BiologyWarsaw University of Life SciencesWarsawPoland