EFFECT OF CHEMICAL MUTAGENS ON TAGETES ERECTA | ||||
| Journal of Plant Production | ||||
| Article 16, Volume 25, Issue 8, August 2000, Page 5241-5256 PDF (812.25 K) | ||||
| Document Type: Original Article | ||||
| DOI: 10.21608/jpp.2000.259564 | ||||
 View on SCiNiTO | ||||
| Authors | ||||
| M. Badr,; M. El-Torky; Ola El- Shennawy; Y. El-Nashar | ||||
| Dept. of Floriculture, Ornamental Horticulture and Garden Design, Fac. of Agriculture, Alexandria University. | ||||
| Abstract | ||||
| Two mutagenic reagents, Diethyl sulphate (DES) and sodium Azide (SA), were used to study their effects on the morphological characteristics of Tagetes erecta (L.) cvs. Petite Yellow and Hawaii , as well as the possibility of mutation induction in the M1 and M2 generations. Seeds were treated with different DES and SA concentrations : 0 (distilled water) 1000, 2000, 3000, 4000 and 5000 ppm. for six hours. DES mutagen at low concentration (1000 ppm.) increased the seed germination percantage, while high concentrations (2000 - 5000 ppm.) decreased it . No Petite Yellow plants were survived after being treated with the high concentration (5000 ppm.) treatment . The DES concentrations of 1000, 2000 and 4000 ppm caused decreases in the plant height of both cultivars in the M1- generation. The DES doses from 2000 to 5000 ppm. significantly decreased the plant height in M2- generation in Hawaii Cv. There were no significant increases in the number of branches per plant in Petite Yellow , but there were significant differences in Hawaii in both generations. The concentration of 2000 ppm. DES significantly delayed the flowering in the M1- generation of Petite Yellow while 1000 and 5000 ppm. concentrations delayed the flowering in the M1-generation of Hawaii . DES concentrations of 3000 and1000 ppm markedly increased the dry weight in the M2- generation of Petite Yellow and Hawaii plants respectively. SA mutagen at low concentration (2000 ppm.) significantly increased the percentage of germinated seeds, of Petite Yellow in the M2- generation. There were no significant differences among the treatments on plant height of Petite Yellow , while there were significant differences in both generations of Hawaii . There were no significant differences between the effects of the different treatments on the number of branches and the number of days to flowering in both cultivars . However, there were significant differences among the treatments on the number of inflorscences per plant. The differences were not significant for the dry weight of both cultivars in both generations . Generally, the results had also indicated that DES and SA was effective in inducing morphological changes and mutations , and the induced changes were found to affect the following characters ; growth habit, flower colour and the number and size of ray florets . | ||||
|
Statistics Article View: 46 PDF Download: 214 |
||||
