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Overexpression of ATP Sulfurylase in Indian Mustard

Effects on Tolerance and Accumulation of Twelve Metals

^a Biology Department, Colorado State University, A/Z Building, Fort Collins, CO 80523
^b Department of Plant and Microbial Biology, 111 Koshland Hall, University of California, Berkeley, CA 94270

View larger version (32K): [in a new window]   Fig. 1. Tolerance of wild-type (WT) and APS (i.e., overexpression of ATP sulfurylase) transgenic Indian mustard seedlings to 12 metal(loid)s, supplied at concentrations as indicated in Table 1. Tolerance is expressed as the ratio of root length in the presence of metals relative to root length on control medium. Values shown are the mean and standard error of the mean of 36 seedlings each. Significant differences between APS and WT seedlings ( = 0.05) are indicated by asterisks.

View larger version (52K): [in a new window]   Fig. 2. Shoot metal concentrations in seedlings of wild-type (WT) and APS (i.e., overexpression of ATP sulfurylase) transgenic Indian mustard supplied with six metals, at concentrations as listed in Table 1. Values shown represent the mean and standard error of the mean of five samples consisting of six or seven seedlings each. All metals shown here were present at significantly different concentrations ( = 0.05) between WT and APS seedlings. Additional results from metals that were accumulated to a similar extent by both plant types are shown in Table 2.

View larger version (51K): [in a new window]   Fig. 3. Shoot metal concentrations in wild-type (WT) and APS (i.e., overexpression of ATP sulfurylase) transgenic Indian mustard plants supplied with six metals at the concentrations listed in Table 1. Values shown represent the mean and standard error of the mean of 10 plants, each sampled once. All metals shown here were present at significantly different concentrations ( = 0.05) between WT and APS plants. Additional results from metals that were accumulated to a similar extent by both plant types are shown in Table 3.