EFFECT OF GA3 TREATMENT ON OSMOTIC-STRESSED JOJOBA SEEDLINGS: II- CHEMICAL COMPOSITION | ||||
| Assiut Journal of Agricultural Sciences | ||||
| Article 5, Volume 37, Issue 3, October 2006, Page 71-91 PDF (540.69 K) | ||||
| Document Type: Original Article | ||||
| DOI: 10.21608/ajas.2006.274625 | ||||
 View on SCiNiTO | ||||
| Authors | ||||
| Farouk S. Badran; A. A. El- Sayed; E. T Ahmed; M. A. H. Mohamed; S. M. Ibrahim | ||||
| Horticulture Department, Faculty of Agriculture, Minia University, Minia. | ||||
| Abstract | ||||
| This Experiment was conducted in two seasons to investigate the effect of GA3 on jojoba (Simmondsia chinensis, Link) seedlings which grown under osmotic stress. One-year old seedlings were grown in soil contains 0.0, 0.4 or 0.8% of NaCl + CaCl2, (1:1 by weight) and irrigated at 60, 80 or 100% of FC. In order to alleviate water and/or salt stress plants were sprayed 5 times with GA3 at 0, 50 and 100 ppm. Leaves content of the photosynthetic pigments, reducing and total sugars were significantly affected by water stress. In the first season, plants grown in soil irrigated up to 60% FC had 5.668 and 25.61 mg/g dry weight of reducing and total sugars respectively, these values were significantly higher than these of plants irrigated up to 100% FC. Percentage of N, P, K, Na and Ca were decreased by the gradual increase in FC. Highest salinity level resulted in the lowest values of the photosynthetic pigments, reducing and total sugars as well as N, P and K%. While Na and Ca% were increased with the gradual increase in the salinity level. Although, GA3 treatment significantly reduced leaves content of photosynthetic pigments, it stimulated reducing and total sugars content. In the first season, leaves of 100 ppm GA3-treated plants had 5.264 and 24.64 mg/g dry weight of reducing and total sugars, respectively. On the other hand the leaves % of N, P, K, Na and Ca of 100 ppm GA3-treated plants were reduced to 2.590, 0.254, 2.705, 1.373 and 1.680%, respectively, which were significantly less than untreated plants. Overall, the highest values of photosynthetic pigments were obtained due to 60% FC, salinity and without applying GA3. Whereas, highest leaves % of N, P and K being for plants treated with 60% FC, 0.0% salinity and 100 ppm GA3. On the other hand highest values of reducing and total sugars were for plants treated with 100% FC, 0.0% salinity and 100 ppm GA3. So that, it could be recommended to treats jojoba plants growing under water and/or salt stress with 100 ppm GA3 to alleviate osmotic stress. | ||||
| Keywords | ||||
| jojoba; Simmondsia chinensis; fixed oil; chemical composition; GA3; soil salinity | ||||
|
Supplementary Files
|
||||
|
Statistics Article View: 68 PDF Download: 67 |
||||
