蜈蚣草砷超富集机制和其在砷污染修复中的应用.pdf

Plant Physiology JournalPlant Physiology Journal 2014, 50 (5): 591~5982014, 50 (5): 591~598doi: 10.13592/ki.ppj.2014.1004doi: 10.13592/ki.ppj.2014.1004 591 1,2 1 1,* , , 1 , , 100093; 2 , 100049 : , , ; , : ; ; ; ; Advance of the Mechanisms of Arsenic Hyperaccumulation in Pteris vittata L. and Applications for Arsenic-Remediation 1,2 1 1,* SHEN Hong-Ling , HE Zhen-Yan , MA Mi 1Key Laboratory of Plant Resources, Institute of Botany, Chinese Academy of Sciences, Beijing 100093, China; 2 College of Life Sciences, University of Chinese Academy of Sciences, Beijing 100049, China Abstract: The fern Pteris vittata can absorb arsenic from the soil, and most of arsenic is transported to the abo- veground tissues, stored in the vacuole of fronds. P. vittata has an effi cient antioxidant system which can reduce arsenic poisoning. Importantly, the arsenate reduction system and vacuole sequestration are critical for arsenic detoxifi cation and arsenic hyperaccumulation. In this review, the latest research progress about the physiologi- cal and molecular mechanisms of arsenic tolerance and accumulation in P. vittata was summarized, and the fu- ture applications of this fern for remediation of removal arsenic-contaminated soils or water were discussed as well. Key words: arsenic; Pteris vittata ; hyperaccumulation; phytoremediation; arsenic detoxifi cation (arsenic, As) , [arsenate, (Kra