EFFECT OF COMBINED INCUBATION OF TWO BACTERIA STRAINS AND AN ARBUSCULAR MYCORRHIZAL FUNGI ON DEHP DEGRADATION AND GROWTH OF MUNG BEAN IN RED SOIL
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    Abstract:

    A pot culture experiment was carried out to study effect of combined incubation of DEHP degrading bacteria and arbuscular mycorrhizal(AM)fungi on bioremediation of DEHP polluted soil and growth of mung bean. Two bacterial strains,i. e. Bacillus sp. DW1 and Gordona sp. DH3,and one strain of AM fungi,Acaulospora laevis 90034,were inoculated,alone or in combination,to the soil amended with 100 mg kg-1 DEHP. A treatment of uninoculated soil was set as control(CK). The plants were harvested 60 days after seedling emergence. Results of the experiment show that AMfungi colonized well in the roots of mung bean. Dry mass of the plant was increased and P nutrition improved by AMF inocula. But inoculation of just DW1 and DH3 did not show any significant effect on mycorrhizal colonization and plant growth. However,the three strains of inoculants, whether inoculated alone or in combination,could obviously promote degradation of DEHP in the soil,but the best synergistic effect on DEHP degradation was found when strains DW1,DH3 and AM fungi wer inoculated in combination. Besides,the inoculation of AMF decreased DEHP accumulation in the shoots of mung bean. The findings in the experiment may serve as scientific basis for bioremediation of DEHP-contaminated soils.

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Qin Hua, Lin Xiangui, Yin Rui, Zhang Huayong, Wang Junhua. EFFECT OF COMBINED INCUBATION OF TWO BACTERIA STRAINS AND AN ARBUSCULAR MYCORRHIZAL FUNGI ON DEHP DEGRADATION AND GROWTH OF MUNG BEAN IN RED SOIL[J]. Acta Pedologica Sinica,2008,45(1):143-149.

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History
  • Received:September 19,2006
  • Revised:December 20,2006
  • Adopted:
  • Online: May 10,2013
  • Published: