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- Title
Alterations of DNA, Ions and Photosynthetic Pigments Content in Date Palm Seedlings Induced by X-Irradiation.
- Authors
Al-Enezi, Norah A.; Al-Khayri, Jameel M.
- Abstract
This study determined the effect of X-irradiation on physiological and biochemical aspects in date palm (Phoenix dactylifera L.) seedlings. Using a medical X-ray device, 15-days-old seedlings were exposed to various X-rays doses (0, 5, 10, 25, 50, 100, 250, 500, 750, 1250 & 1500 rad). After growing the irradiated seedlings in soil for 2 months, chemical analysis was conducted. The data indicated that DNA content was dose dependent showing a significant increase with 5 rad, the lowest radiation dose tested and reaching the highest level at 25 rad. Similarly, the highest ions content was observed at 25 rad. A dose of 5 rad caused a significant increased sodium, potassium and phosphorus ions but a minimum dose of 10 rad was necessary to significantly enhance the content of calcium and magnesium ions. Conversely, total photosynthetic pigments started to diminish at 5 rad and continued to decrease with dose increases reaching the lowest level at 1500 rad. Significant reductions of chlorophyll a and carotenoids content started at 5 rad, whereas reduction of chlorophyll b occurred at 10 rad. This suggests that chlorophyll a and carotenoids are more sensitive to X-irradiation than chlorophyll b.
- Subjects
PHOTOSYNTHETIC pigments; CHLOROPLAST pigments; SEED irradiation; DATE palm; ECOPHYSIOLOGY of seedlings; GENETIC polymorphisms in plants; SOIL profiles
- Publication
International Journal of Agriculture & Biology, 2012, Vol 14, Issue 3, p329
- ISSN
1560-8530
- Publication type
Article