Mitigative Effect of Bacillus subtilis QM3 on Root Morphology and Resistance Enzyme Activity of Wheat Root under Lead StressReport as inadecuate




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Lead Pb is an environmental pollutant extremely toxic to plants andother living organisms including humans. In order to research the relieveeffect of Bacillus subtilis QM3on wheat roots Triticum aestivum L., after wheat seeds germination fortwo days, wheat root caused, the experimental materials were divided into fourlarge groups and each large group was placed in 6 petri dishes as six smallgroups, and then four large groups respectively cultivated with sterile waterCK, 108 CFU-ml B. subtilis QM3 B1, 107 CFU-ml B. subtilis QM3 B2 and 106 CFU-ml B.subtilis QM3 B3 for 2 days,after that stressed with lead nitrate, Pb NO2, Pb2+ concentrationcalculation at five concentrations 50, 250, 500, 1000, 2000 mg-L, sterilewater and different Pb2+ concentration liquid respectivelycultivated the 6 small groups in each large group measuring root morpholog andassaying changes of antioxidant enzyme activity. The results showed that: withthe increase of the Pb2+ concentration, root morphology index andthe activity of antioxidant enzyme increased first and then decreased. Rootmorphology index reached the maximum in 50 mg-L Pb2+ concentration. B.subtilis QM3 clearlypromoted the growth of the root and the antioxidant enzyme activity p



Author: Yang Hao, Haitao Wu, Yanfang Liu, Qingping Hu*

Source: http://www.scirp.org/



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