EFFECTS OF SOME MUTAGEN AGENTS ON CERTAIN BOTANICAL ASPECTS OF FABA BEANS | ||||
| Journal of Plant Production | ||||
| Article 9, Volume 27, Issue 4, April 2002, Page 2073-2093 PDF (8.01 MB) | ||||
| Document Type: Original Article | ||||
| DOI: 10.21608/jpp.2002.253961 | ||||
 View on SCiNiTO | ||||
| Authors | ||||
| A. Selim,1; Fatma H. EI-Ginibihi1; Z. M. Atia2 | ||||
| 1Agric. Botany Dept., Fac. of Agriculture, Minufiya Univ., Shibin EI- Kom, Egypt | ||||
| 2Plant Res. Dept., Atomic Energy Authority, Egypt | ||||
| Abstract | ||||
| A cultivar Giza2 of Vicia faba was treated with gamma rays doses of 30 and 60 Gy and ethyl methane sulfonate (EMS) at conc. of 0.15 and 0.30% and the effects were assessed in M5 and M6 generations. The effect of mutagens was studied using a number of parameters, such as morphological growth characters, some physiological parameters, flowering and yield attributes, and nutritive values of seeds. All faba bean mutants induced by gamma irradiation and EMS tended to increase in most growth characters, and the maximum increase in this respect was achieved by the mutants No.7, 4 and 10. On the other hand, mutant No.1 was nearly similar to the untreated plants in most growth characters. Concentration of chlorophyll a, b and total chlorophyll as well as carotenoids tended to arise in all mutants (except mutant No.2) over the untreated plants, mutants No.7, 8, 9 and 1 had the highest pigments conc. in both M5 and M6 generations. The ratios of chl.a/b as well as total chl.lcarotenoids in most mutants of both generations did not show clearly changes comparable with the control. Leaves in all mutants had higher total water content (TWC) and relative water content (RWC) but lower water deficit (LWD) except mutants No.4 for TWC and 8 for both RWC and LWD that showed a reverse trend. The best mutant for the highest' RWC and the lowest LWD was mutant NO.1. Transpiration rate was significantly reduced in most mutants except some mutants in M5 generation, and the lowest one was recorded by mutant No.7. Use of water by mutants for producing dry seeds and dry matter (WUE) was more efficient than that the untreated plants. mutants No.1 and 4 showed the best WUE. Mutants showed different trends in the number of flowers, the greatest one was achieved by mutants No.1, 2, 3, 4 and 7. Mutants exceeded over the untreated plants in pod set (%), sharply reduced in flower and pod shedding percentage, mutant No.1 (M5) and NO.7 (M6) were the best in this respect. Pod, seed and straw yield tended to increase in most mutants, mutants NO.1 and 4 had the highest pod and seed' yield while the highest straw yield was achieved by mutants NO.8 (M5) and 1 (M6). Mutants No.4, 5, 2 and 8 (M5) and No.1, 4 and 8 (M6), recorded the highest seed index. Shelling percentage was higher in all mutants except mutants NO.3 and 10. The chemical composition of faba bean mutants seeds in both M5 and M6 generations indicate that most mutants had higher nutritive value with some exceptions. It is worthy that mutants No.5, 4 and 7 recorded the highest protein conc. while mutants NO.6 and 9 contained the highest carbohydrate cone. comparable with the other mutants. | ||||
| Keywords | ||||
| Faba bean; mutation induction; growth; photosynthetic pigments; water relations; flowering and fruiting; yield attributes; seeds nutritive value | ||||
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