RNA Interference-mediated Silencing of Phytochelatin Synthase Gene Reduce Cadmium Accumulation in Rice Seeds Enhanced Cadmium Accumulation in Transgenic Tobacco Expressing the Phytochelatin Synthase Gene of Cynodon dactylon L. IMPROVING HEAVY METAL TOLERANCE OF YEAST BY TRANSFERRING A PHYTOCHELATIN SYNTHASE GENE FROM GARLIC Molecular Cloning and Expression Analysis of a Phytochelatin Synthase Gene,PcPCS1,from Pyrus calleryana Dcne. Molecular Cloning and Expression Analysis of a Phytochelatin Synthase Gene,PcPCS1,from Pyrus calleryana Dcne.