Abstract
The cDNA of the metallothionein-like (MT-like) gene from Festuca rubra cv. Merlin was optimized with bias codon of Chlamydomonous reinhardtii chloroplast genome. The optimized MT-like gene was delivered into C. reinhardtii chloroplast and the transgenic strains expressing MT-like gene was obtained. PCR-Southern blot and RT-PCR-Southern blot analysis demonstrated that the MT-like gene was integrated into chloroplast genome of C. reinhardtii and expressed at the transcriptional level. The cadmium binding capacity of the transgenic C. reinhardtii was determined by hydride generation-atomic fluorescence spectrometry (HG-AFS) and the binding properties were analyzed. Results showed that the transgenic C. reinhardtii expressing the MT-like gene exhibited remarkably higher Cd2+ binding capacity and grew to higher densities at toxic Cd2+ concentrations (40–100 μmol/L) than the wild type strain, and that the IC50 of Cd2+ (3-d treating) to algal cell growth of transgenic strain was 55.43% higher than that of the wild type strain, indicating that the Cd2+ binding capacity and Cd2+ tolerance of C. reinhardtii was enhanced through the expression of the foreign MT-like gene in chloroplast.
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Supported by the Natural Science Foundation of Guangdong Province (Grant No. 5010492) and the Plan of Science and Technology of Shenzhen Municipality, China
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Han, S., Hu, Z. & Lei, A. Expression and function analysis of the metallothionein-like (MT-like) gene from Festuca rubra in Chlamydomonas reinhardtii chloroplast. SCI CHINA SER C 51, 1076–1081 (2008). https://doi.org/10.1007/s11427-008-0136-3
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DOI: https://doi.org/10.1007/s11427-008-0136-3