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Pakistan Journal of Biological Sciences
  Year: 1999 | Volume: 2 | Issue: 2 | Page No.: 445-448
DOI: 10.3923/pjbs.1999.445.448
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Effect of Drying Treatments on the Germination and Imbibitional Leakage of Salvadora oleiodes Seeds

Sarvat Nisar and Mohammad Ashraf

Immature and developing seeds of Salvadora oleiodes (locally called Pelun) were collected in May/June and graded into small (S) and large (L) and either dried under the sun (sun-dried) or in the laboratory (shade-dried) upto 8±2 percent moisture content. When electrical conductance (E.C.) of leachates measured was taken as an index of membrane damage, leachates of seeds with testa ( intact`) exhibited lower E.C. values after 6 hours of imbibition than that of without testa ( naked`). Shade-dried (S) naked` seeds had lower E.C. values (30.9 μ S /cm/seed) than their intact` counterparts (61.84 μ S/cm/seed). When nature of molecules effluxed during the first 30 minutes of imbibition was determined, K ions were dominant inorganic species than Na ions, and with higher rates of leakage in sun-dried intact` seeds (12-77 ppm/seed) than the shade-dried (22-54 ppm/seed) ones. Na ions levels remained constant (14-15 ppm/seed) in shade-dried intact` seeds than the sun-dried ones (5-18.5 ppm/seed). When amino acids and total sugar contents were determined in naked` seeds, sun-dried seeds exhibited higher amino acids leached (5-15.8 μ moles/seed) than the shade-dried ones; 7-9.5 μmoles/seed in L` and 10-16.8 μmoles/seed in S` seeds. Soluble sugar contents in seeds of both the treatments varied in the range 18.75-33.7 μg/seed and were statistically insignificant to draw any conclusions between the two drying methods. It was also seen that the nature of the molecules effluxed was not correlated with the germination behaviour of seeds since only shade-dried ( S` and L`) seeds showed 100 per cent germination whilst sun-dried ( L`) had 40 per cent germination and immature as well as sun-dried ( S`) seeds did not germinate at all.
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How to cite this article:

Sarvat Nisar and Mohammad Ashraf , 1999. Effect of Drying Treatments on the Germination and Imbibitional Leakage of Salvadora oleiodes Seeds
. Pakistan Journal of Biological Sciences, 2: 445-448.

DOI: 10.3923/pjbs.1999.445.448






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