CHARACTERIZATION OF RHIZOBIAL BACTERIA ISOLATED FROM ARSENICCONTAMINATED SITE IN SOUTH-EASTERN KURDISTAN PROVINCE AND THEIR INFLUENCE ON PLANT GROWTH

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SAADATI R.; BAHRAMNEJAD B.; HARIGHI B.

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Journal: Journal of Soil Biology Year:2017 | Volume:5 | Issue:1 Page(s): 15-27

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Title

CHARACTERIZATION OF RHIZOBIAL BACTERIA ISOLATED FROM ARSENICCONTAMINATED SITE IN SOUTH-EASTERN KURDISTAN PROVINCE AND THEIR INFLUENCE ON PLANT GROWTH

Author(s)

SAADATI R. | BAHRAMNEJAD B. | HARIGHI B. | Issue Writer Certificate

Keywords

ARSENIC RESISTANCEQ1

LEGUMESQ3

RHIZOBIAQ1

Abstract

Symbiotic bacteria associated with the root of legume plants were isolated from soil and the root nodules of alfalfa (Medicago sativa L.), chickpea (Cicer arietinumL.) and yellows alfalfa (Melilotus officinalis L.) grown in arseniccontaminated areas in south eastern part of Kurdistan province, Iran. According to physiological and biochemical properties, isolates were identified as the members ofRhizobium and Ensifer genus. The presence of arsenic resistant system known asars system was confirmed by amplification using primers corresponding toarsC gene. Growth rate of strains in different concentrations of arsenate was investigated in YEMB medium supplemented with 100-400 mM arsenate. Alfalfa, s isolates (AB1, AB3), chickpea, s isolates (PA2, PC2), yellow alfalfa, s isolate (YA1) and standard strain (Sinorhizobium meliloti SM117) were tolerant to 350 mM arsenate and (AB1, PA2 and YA1) isolates were moderately capable to grow at 400 mM arsenate. Among the identified strains, AB1 and PA2, were selected for greenhouse experiments. In order to evaluate the effect of arsenic contamination on legume-rhizobia symbiosis and biomass production of alfalfa and chickpea plants, an experiment was carried out based on a completely randomized design with a factorial arrangement in three replications. Experiment factors consisted of, three levels of RHIZOBIA inoculation (with and without inoculation of AB1 and PA2) and five levels of arsenic concentrations (0.10, 50, 75 and 100 mgkg-1 soil) under greenhouse conditions for 8 weeks. Results obtained in this study indicated that the fresh weight and dry weight of alfalfa and chickpea (shoot and root) were decreased as the arsenic concentration of the soil was increased. The results also showed that fresh and dry shoot and root weight of alfalfa and chickpea were significantly higher in RHIZOBIA-inoculated treatments compared to noninoculated plants.

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APA: Copy

SAADATI, R., BAHRAMNEJAD, B., & HARIGHI, B.. (2017). CHARACTERIZATION OF RHIZOBIAL BACTERIA ISOLATED FROM ARSENICCONTAMINATED SITE IN SOUTH-EASTERN KURDISTAN PROVINCE AND THEIR INFLUENCE ON PLANT GROWTH. JOURNAL OF SOIL BIOLOGY, 5(1 ), 15-27. SID. https://sid.ir/paper/241385/en

Vancouver: Copy

SAADATI R., BAHRAMNEJAD B., HARIGHI B.. CHARACTERIZATION OF RHIZOBIAL BACTERIA ISOLATED FROM ARSENICCONTAMINATED SITE IN SOUTH-EASTERN KURDISTAN PROVINCE AND THEIR INFLUENCE ON PLANT GROWTH. JOURNAL OF SOIL BIOLOGY[Internet]. 2017;5(1 ):15-27. Available from: https://sid.ir/paper/241385/en

IEEE: Copy

R. SAADATI, B. BAHRAMNEJAD, and B. HARIGHI, “CHARACTERIZATION OF RHIZOBIAL BACTERIA ISOLATED FROM ARSENICCONTAMINATED SITE IN SOUTH-EASTERN KURDISTAN PROVINCE AND THEIR INFLUENCE ON PLANT GROWTH,” JOURNAL OF SOIL BIOLOGY, vol. 5, no. 1 , pp. 15–27, 2017, [Online]. Available: https://sid.ir/paper/241385/en

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