Nuclear Agriculture and Biotechnology Division, Bhabha Atomic Research Centre, Trombay, Mumbai 400085, India.
Bioresour Technol. 2010 Apr;101(8):2573-9. doi: 10.1016/j.biortech.2009.10.054. Epub 2009 Nov 24.
The uranium (U) accumulation potential and ensuing biochemical responses were studied in Hydrilla verticillata (L.f.) Royle upon exposure to U (0, 20 and 100 mg L(-1)). There was a concentration-duration dependent increase in U accumulation with the maximum being 78 mg g(-1) DW at 100 mg L(-1) U after 24 h. Plants experienced an initial phase of the maximum toxicity (within 30 min) followed by almost complete recovery after 24 h. The recovery was attributed to an integrated modulation in the level of both enzymatic and molecular antioxidants (viz., guaiacol peroxidase, ascorbate peroxidase, catalase, proline, total phenolics) and also the constituents of thiol metabolism (viz., cysteine and glutathione). Thus, plants were found to be able to accumulate significant amount of U in a short time and to tolerate it efficiently. Hence, they may find application in U phytoremediation considering there accumulation ability, fast growth due to weed-like habit and world-wide distribution.
研究了在暴露于铀（0、20 和 100mg/L）条件下，水鳖（L.f.）对铀的积累潜力和随之而来的生化反应。铀的积累与浓度-时间呈依赖性增加，在 24 小时时，100mg/L U 下的最大积累量为 78mg/g DW。植物经历了一个最大毒性的初始阶段（在 30 分钟内），然后在 24 小时后几乎完全恢复。这种恢复归因于酶和分子抗氧化剂（愈创木酚过氧化物酶、抗坏血酸过氧化物酶、过氧化氢酶、脯氨酸、总酚）以及硫醇代谢成分（半胱氨酸和谷胱甘肽）水平的综合调节。因此，植物被发现能够在短时间内积累大量的铀，并有效地耐受它。因此，考虑到它们的积累能力、由于杂草样习性和全球分布而快速生长，它们可能会在铀的植物修复中得到应用。
