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Research Journal of Environmental Sciences
  Year: 2011 | Volume: 5 | Issue: 6 | Page No.: 557-564
DOI: 10.3923/rjes.2011.557.564
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Sensitivity of Seed Germination and Seedling Radicle Growth to Drought Stress in Sesame (Sesamum indicum L.)

S. Boureima, M. Eyletters, M. Diouf, T.A. Diop and P. Van Damme

In order to study the effect of drought stress on germination indices in sesame (Sesamum indicum L.), a factorial experiment, using a completely randomized design with three replications was conducted. In this experiment, 22 confirmed sesame mutants induced through gamma ray treatment and their respective three parental sources were evaluated for five levels of drought stresss= 0, -0.5, -1, -1.5 and -2 MPa) using aqueous solutions of PEG-6000. For each treatment, germination was checked every 48 h. Emerged seedling percentages as well as seedling root length were recorded after 7 days of experiment. Results evidence significant differences among genotypes and drought stress levels. Germination, emergence and root length were significantly reduced against control from a drought stress level ≤-1 MPa. Seeds did not germinate at all at an osmotic potential ≤-1.5 MPa whereas emergence was completely inhibited by -1 MPa. In present experimental conditions, a mild drought stress (-0.5 MPa) improved root growth in most genotypes studied as compared to controls. Emergence was the parameter the most affected by drought stress and germination the least affected. Genotypes hsc105, lc162, mc112, ef147 and hc107 were found to be more drought tolerant than their respective parents. Although sesame is reputed to be a drought tolerant crop, it is very susceptible to drought at germination stage and sufficient soil moisture is required for sesame seed emergence.
PDF Fulltext XML References Citation Report Citation
  •    Antifungal Activity Evaluation of Trichoderma Species Against Fusarium Wilt and Alternaria Leaf Blight of Sesame (Sesame indicum L.) Under in vitro Conditions
  •    Antioxidant Activities During Drought Stress Resistance of Sesame (Sesamum indicum L.) Plant by Salicylic Acid and Kinetin
  •    Drought Tolerance in Crop Plants
  •    Effects of Abscisic Acid on Somatic Embryogenesis and Induction of Desiccation Tolerance in Brassica napus
  •    Effect of Drought on Water Relations, Growth and Solute Accumulation in Two Sesame Cultivars
  •    Evaluation of Water Stress and Nitrogen Fertilizer Effects on Relative Water Content, Membrane Stability Index, Chlorophyll and Some Other Traits of Lentils (Lens culinaris L.) Under Hydroponics Conditions
  •    Effects of Water Deficit on Drought Tolerance Indices of Sesame (Sesamum indicum L.) Genotypes in Moghan Region
How to cite this article:

S. Boureima, M. Eyletters, M. Diouf, T.A. Diop and P. Van Damme, 2011. Sensitivity of Seed Germination and Seedling Radicle Growth to Drought Stress in Sesame (Sesamum indicum L.). Research Journal of Environmental Sciences, 5: 557-564.

DOI: 10.3923/rjes.2011.557.564


11 November, 2011
Tyrrel .R. Chisenga :
How were the seeds cultured in the petri dishes and how were the seedlings allowed to grow. Maybe a picture could help. Were the perti dishes vertical to allow the roots to grow vertically along the paper, to allow easy measurement?

I hope you can be of assistance to the above questions.

Kind regards





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