FREE PROLINE RELATION TO SALINITY TOLERANCE OF THREE SUGAR BEET VARIETIES | ||||
| Egyptian Journal of Agricultural Research | ||||
| Article 16, Volume 73, Issue 1, March 1995, Page 175-191 PDF (3.76 MB) | ||||
| Document Type: Original Article | ||||
| DOI: 10.21608/ejar.1995.433203 | ||||
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| Authors | ||||
| MOHAMED A. HIGAZY1; MONA M. SHEHATA2; ABDEL-WAHAB I. Al-ALLAM2 | ||||
| 1Faculty of Agricultural, Cairo University, Giza, Egypt | ||||
| 2Sugar Crops Research Institute, Agricultural Research Centre, Giza, Egypt | ||||
| Abstract | ||||
| Sugar beet varieties, Tribel, Maribo Marocpoly and Kawegiga Mono, differed in their osmoresponse under saline water irrigation in pot experiments during 1985/86 and 1986/87. Results revealed that Tribel is the most salt tolerant variety copmared with the other two varieties. Tribel can withstand 6000 ppm salt concentration of irrigation water without any significant reduction in fresh and dry weihts of its roots, as well as in the total soluble solids and sucrose percentage. Irrigation, generally, resulted in a very sharp decline in the amount of free proline in the leaves of the three sugar beet varieties. Increasing salt concentration of irrigation water caused a gradual and significant increase in the accumulation of praline in leaves of cv. Tribel over all salinity treatments (2000, 4000 and 6000 ppm), while insignificant differences in proline concentration were detected between the control (tap water) and 2000 ppm. For the other two varieties, the increase of proline concentration was significant under 4000 ppm treatment, while insignificant differences in proline concentration were detected between the control and 2000 ppm, as well as between 4000 ppm and 6000 ppm salinity levels. Gradual increase in the accumulation of praline in the Tribel variety provides evidence of the relationship between proline accumulation and salinity tolerance in sugar beet. | ||||
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