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Published online 17 July 2007
Published in J Environ Qual 36:1260-1265 (2007)
DOI: 10.2134/jeq2007.0008
© 2007 American Society of Agronomy, Crop Science Society of America, and Soil Science Society of America
677 S. Segoe Rd., Madison, WI 53711 USA
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Pyrene Mineralization by Mycobacterium sp. Strain KMS in a Barley Rhizosphere

R. Childa, C. D. Millera, Y. Liangb, R. C. Simsb and A. J. Andersona,*

a Dep. of Biology, Utah State University, Logan, UT, 84322
b Department of Biological Engineering and Irrigation, Utah State University, Logan, UT, 84322


Figure 1
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  		Fig. 1. Schematic of the microcosms used to examine mineralization by barley colonized with Mycobacterium isolate KMS.

 

Figure 2
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  		Fig. 2. Pyrene mineralization in microcosms containing barley, the Mycobacterium sp. strain KMS or barley with roots colonized by the mycobacterium cells. Data are the mean of three independent experiments for each microcosm ± SD.

 

Figure 3
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  		Fig. 3. 14C levels in sand, roots, and leaf tissues of barley from 10-d-old microcosms under continuous or discontinuous air flow conditions. Data are the mean of three independent experiments ± SD.

 

Figure 4
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  		Fig. 4. Total pyrene mineralization in microcosms containing sand, barley, the bacterial strain KMS, or barley grown with roots colonized by Mycobacterium sp. strain KMS. Data combine the 14CO2 trap data shown in Fig. 2 plus the 14C estimated to be incorporated into the plant tissues from fixation of evolved 14CO2. This estimated 14CO2 fixation by photosynthesis was obtained by subtracting 14C levels detected in plant tissues in a continuous-flow environment from 14C levels detected in discontinuous air flow microcosms. Data are the mean of three independent experiments ± SD.

 




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Copyright © 2007 by the American Society of Agronomy, Crop Science Society of America, and Soil Science Society of America.