Plant Cell Reports

, Volume 28, Issue 6, pp 997–1009

Gene expression changes in response to drought stress in Citrullus colocynthis

Biotic and Abiotic Stress

DOI: 10.1007/s00299-009-0703-5

Cite this article as:
Si, Y., Zhang, C., Meng, S. et al. Plant Cell Rep (2009) 28: 997. doi:10.1007/s00299-009-0703-5


Citrullus colocynthis (L.) Schrad, closely related to watermelon, is a member of the Cucurbitaceae family. This plant is a drought-tolerant species with a deep root system, widely distributed in the Sahara-Arabian deserts in Africa and the Mediterranean region. cDNA amplified fragment length polymorphism (cDNA-AFLP) was used to study differential gene expression in roots of seedlings in response to a 20% polyethylene glycol-(PEG8000) induced drought stress treatment. Eighteen genes which show similarity to known function genes were confirmed by quantitative relative (RQ) real-time RT-PCR to be differentially regulated. These genes are involved in various abiotic and biotic stress and developmental responses. Dynamic changes with tissue-specific pattern were detected between 0 and 48 h of PEG treatment. In general, the highest induction levels in roots occurred earlier than in shoots, because the highest expression was detected in roots following 4 and 12 h, in shoots following 12 and 48 h of drought. These drought-responsive genes were also affected by the plant hormones abscisic acid (ABA), salicylic acid (SA), or jasmonic acid (JA), indicating an extensive cross-talk between drought and plant hormones. Collectively, these results will be useful to explore the functions of these multiple signal-inducible genes for unveiling the relationship and crosstalk between different signaling pathways.


Drought stresscDNA-AFLPGene expressionCitrullus colocynthisRelative quantitative real-time RT-PCRPlant hormones

Copyright information

© Springer-Verlag 2009

Authors and Affiliations

  • Ying Si
    • 1
  • Cankui Zhang
    • 1
  • Shasha Meng
    • 1
  • Fenny Dane
    • 1
  1. 1.Department of HorticultureAuburn UniversityAuburnUSA