![]() Plant Cell Tiss Org Cult 107(1):69–77īhuiyan MSU, Min SR, Jeong WJ, Sultana S, Choi KS, Song WY, Lee Y, Lim YP, Liu JR (2011b) Overexpression of a yeast cadmium factor 1 (YCF1) enhances heavy metal tolerance and accumulation in Brassica juncea. Plant Physiol 151:590–602īhuiyan MSU, Min SR, Jeong WJ, Sultana S, Choi KS, Lee Y, Liu JR (2011a) Overexpression of AtATM3 in Brassica juncea confers enhanced heavy metal tolerance and accumulation. Trends Plant Sci 19:90–98īernard DG, Cheng Y, Zhao Y, Balk J (2009) An allelic mutant series of ATM3 reveals its key role in the biogenesis of cytosolic iron-sulfur proteins in Arabidopsis. This process is experimental and the keywords may be updated as the learning algorithm improves.īätz U, Martinoia E (2014) Root exudates: the hidden part of plant defense. These keywords were added by machine and not by the authors. The results show that overexpression of ABC proteins alone is not sufficient to produce plants that can efficiently decontaminate soils, but they indicate that this class of transporters, when combined with other transporters and enzymes involved in heavy metal transport and detoxification, may prove a good solution to produce plants that can stabilize, and in the long term clean up, soils contaminated with heavy metals. Several laboratories took advantage of the fact that ABC transporters are involved in heavy metal tolerance to generate transgenic plants suitable for phytoremediation. However, the final proof as to which substrate is transported by AtATM3 is still missing. The different studies indicate that this transporter is important for the production of cytosolic iron sulfur complexes and molybdenum cofactors, prosthetic groups required for several enzymes. A mitochondrial ABC transporter AtATM3 was shown to be required for plant growth and development. However, with the exception of STAR1, an UDP glucose exporter, which-by altering cell wall composition-confers aluminum tolerance, the substrates required to be transported to confer heavy metal resistance by these plasma membrane-localized ABC proteins are still not elucidated. Several plasma membrane transporters have also been shown to confer heavy metal resistance. But it was only recently that two ABCC-type transporters, AtABCC1 and AtABCC2, have been identified as major apo-phytochelatin and phytochelatin-heavy metal(oid) complex transporters. Biochemical studies have indicated that vacuolar ABC transporters should also play an important role in heavy metal detoxification in plants. The first evidence showing that ABC transporters are involved in heavy metal resistance in eukaryotic cells has been obtained from experiments in Schizosaccharomyces pombe and Saccharomyces cerevisae, where a half-size transporter of the ABCB subclass and an ABCC-type transporter, respectively, have been shown to confer heavy metal tolerance.
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