EFFECET OF GIBBERLLlNE SPRAY ON GROWTH AND SOME CHEMICAL CONSTITUENTS OF Casurina g/auca SEEDLINGS GROWN UNDER DILUTED SEA WATER CONDITIONS. | ||||
| Journal of Plant Production | ||||
| Article 23, Volume 29, Issue 12, December 2004, Page 7287-7303 PDF (4.63 MB) | ||||
| Document Type: Original Article | ||||
| DOI: 10.21608/jpp.2004.238964 | ||||
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| Authors | ||||
| Rawya A. Eid,; Azza A. M. Mazher | ||||
| Ornamental Plants and Woody Trees Dept., National Res. Center. | ||||
| Abstract | ||||
| This study was carried out in National Research Centre, Dokki. Giza in the two successive seasons 2002 and 2003 to study the effect of different salinity levels of diluted sea water(3000,6000,9000 and 12000 ppm) and gibberelline spray on growth and chemical constituents of Casurina g/auca whereas control plants were irrigated with tap water (250 ppm salts). The obtained results showed that, salinity levels in most cases led to lower values of plant height, stem diameter,root length, fresh and dry weight of plant organs, chlorophyll A&B, N,P and K percentages in the two seasons. While carotenoids, carbohydrates,proline,Na,Ca and Mg percentages in the aerial parts increased as salinity levels were raised. GA3 at 200 ppm led to the greatest values of plant height, stem diameter, root length, fresh weight of stem in the first season, dry weight of stem in both seasos, fresh and dry weight of branchlets in the second season, fresh and dry weight of roots in the first season and chlorophyll A&B. On the other hand, dry weight of root, carbohydrate, N,P,K,Na and Mg contents in both seasons. Ca in the first season increased by increasing GA3 ppm. Salinity at 3000ppm and GA3 at 100&200 ppm increased mostly plant height, stem diameter, dry weight of stem, fresh and dry weight of branch lets and fresh and dry weight of roots in both seasons. | ||||
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