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Research Paper | January 1, 2014

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Effect of polyethylene glycol on the amount of chlorophyll a, chlorophyll b and total leaf of sugar beet genotypes

Mojtaba Ghasemi Fahim, Bahram Mirzamasoumzadeh, Babak Ahadzadeh

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J. Bio. Env. Sci.4(1), 233-237, January 2014


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Photosynthesis was one of important physiological processes in the plant. Water shortages would reduce its intensity. Photosynthesis persistency and maintaining leaf chlorophyll under stress conditions were physiological features of stress resistance. So, this research was performed on 2012 at greenhouse in order to investigate the effect of polyethylene glycol on chlorophyll a, b and Total on three sugar beet genotypes. Experiment was done as Two-factor factorial in form of randomized complete block design with three replications. Factor a (stress level: 1 normal irrigation, 2: Polyethylene glycol 6000 with 30% concentration) and factor b (genotypes) was performed. Results showed that the factors a and b were not significant in All traits. But interaction between factors level a × b showed significant differences at the 5% level the two characters of chlorophyll a and total chlorophyll. Bilateral comparison showed that the combination (normal × genotype 7233-P29) with an average of 6.36 had highest levels of chlorophyll a and combination (PEG 6000 × genotype- 7233-P29) with an average of 3.79 had lowest level. The composition of the total chlorophyll (PEG 6000 × genotype Jolge and normal × genotype 7233-P29), respectively, with a mean of 7.83 and 7.93 had highest Total chlorophyll and combination (PEG 6000 × genotype-7233-P29) with an average of 5.44 had lowest amount. Rate of chlorophyll a and b are increased with stress intensity, but this issue was not true about total chlorophyll and with increasing stress intensity, total chlorophyll was decreased.


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