EFFECT OF FREEZING STRESS ON ELECTROLYTE LEAKAGE OF SUGAR BEET (BETA VULGARIS L.) GENOTYPES

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NEZAMI A.; KHAZAEE H.; POURAMIR F.; SAEIDNEJAD A.H.; MEHRABADI H.

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Journal: Crop Production Year:2015 | Volume:8 | Issue:3 Page(s): 63-76

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Title

EFFECT OF FREEZING STRESS ON ELECTROLYTE LEAKAGE OF SUGAR BEET (BETA VULGARIS L.) GENOTYPES

Author(s)

Keywords

COLD TOLERANCE

CYTOPLASMIC MEMBRANE

LT50EL

Abstract

Background and Objectives: Spring cultivation of sugar beet is prevalent, but nowadays because of water scarcity and also plants low water use efficiency in this time of cultivation, autumn cultivation is growing up. Several assessments also have showed that in compare with spring cultivation, autumn cultivation of sugar beet has other benefits including reducing the likelihood of plant disease and pests outbreaks as well as high radiation use efficiency and also other resources use efficiency. In contrast, in autumn cultivation several vital processes will be disturbed when sugar beet plants are exposed to chilling stress condition. Thus, it’s necessary to identify chilling tolerance of sugar beet genotypes for this purpose, but because of temporal and spatial variation in chilling stress occurrences in natural environmental condition, it might be lead to uncertain results. As well as, selection processes of sugar beet chilling tolerance genotypes in the natural conditions will take long time and more cost than controlled conditions.Materials and Methods: In order to evaluation of chilling tolerance in sugar beet (Beta vulgaris L.) genotypes (Jolge, Palma, Giada, Monatunno, SBSI1, Super Ma and PP8) which were candidate for autumn cultivation, an experiment was performed in the Faculty of Agriculture Ferdowsi University of Mashhad as a factorial experiment in completely randomized design with three replications in 2009. In this study, sugar beet genotypes were exposed to 10 freezing temperatures (including 0, -2, -4, -6, -8, -10, -12, -14, -16 and -18oC) at controlled conditions and then amount of electrolyte leakage was measured.Results: Results showed that the effects of freezing temperature and genotype on electrolyte leakage were significant. Jolge, PP8 and Super Ma genotypes with 38.7 %, 38.5 % and 37.7 % had the highest amount of electrolyte leakage, respectively and the Monatunno genotype with 26 % had the lowest amount. Interaction effect of genotype and temperature on LT50el was significant. Monatunno genotype with - 11.1 and Palma genotype with -9.6 degree centigrade had the highest and the lowest freezing tolerance, respectively. Based on correlation between electrolyte leakage and LT50el, sugar beet genotypes separated in two groups. Sensitive group including Jolge, PP8, Sbsi1 and Superma genotypes and resistant group including Monatunna, Giada and Palma genotypes. There was high significant correlation (r=0.98***) between electrolyte leakage and LT50el in the resistant group while it was low (r=0.64) in the sensitive group.Conclusion: Chilling stress is one of the major limiting factors for sugar beet cultivation in the region which have moderate weather. Therefore, identifying and selecting the genotypes that are able to resist under this conditions would have high priority. As well as, based on high correlation between electrolyte leakage and LT50el with plants resistance to chilling stress in several experiments, it seems that this trait could be used for assessment of high tolerant genotypes for autumn cultivation of sugar beet in the Iran.

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APA: Copy

NEZAMI, A., KHAZAEE, H., POURAMIR, F., SAEIDNEJAD, A.H., & MEHRABADI, H.. (). . , (), -. SID. https://sid.ir/paper/135157/en

Vancouver: Copy

NEZAMI A., KHAZAEE H., POURAMIR F., SAEIDNEJAD A.H., MEHRABADI H.. . [Internet]. ;():-. Available from: https://sid.ir/paper/135157/en

IEEE: Copy

A. NEZAMI, H. KHAZAEE, F. POURAMIR, A.H. SAEIDNEJAD, and H. MEHRABADI, “,” , vol. , no. , pp. –, , [Online]. Available: https://sid.ir/paper/135157/en

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