[{"id":31,"title":"Does transpiration in hyperaccumulator Pteris vittata mediate asenic translocation from the roots to fronds via xylem?","sha":"3089ef1924d56ecfe40c378469d70bf4","user_id":79,"state":"published","body":"Since the first arsenic (As) hyperaccumulator _Pteris vittata_ was discovered by Ma et al.(2001), we have clarified somewhat in As detoxification in this fern. It is believed that _P. vittata_, as a “model fern” for As study, may take up arsenate (AsV) and arsenite (AsIII) via phosphate transporters (PHTs) and aquaglyceroporins (AQGPs) respectively similar to _Oryza sativa_ and _Arabidopsis thaliana_. Although Indriolo et al.(2010) reported that AsIII transporter PVACR3 mediates AsIII sequestration in the vacuoles of _P. vittata_ fronds, result from Chen et al.(2013) showed different alternative that AsIII is likely to be pumped into apoplasts. One interesting question is that how _P. vittata_ translocates AsIII from the roots to fronds, resulting in up to 2.3% As in _P. vittata_ fronds.\r\nBased on the fact that As promotes _P. vittata_ growth even though hundreds of ppm As is amended, without adverse effects, and pinnae accumulates a high content of As, I think whether As translocation in _P. vittata_ is mediated by transpiration via xylem. When _P. vittata_ was exposed to As, it grew better than that of the condition without As amendation, and it tolerated to drought condition. We thus should answer the potential roles of transpiration in arsenic translocation in _P. vittata_.","created_at":"2015-02-13T10:03:06.901Z","updated_at":"2015-02-20T04:34:56.778Z","zenodo_id":22160,"doi":"http://dx.doi.org/10.5281/zenodo.15095","subject":null,"tags":["biology","arsenic","hyperaccumulator","pteris","vittata"],"vote_count":1,"view_count":1,"score":1.1,"deleted":false,"muted":false,"tweeted":false,"attachment_file_name":null,"attachment_content_type":null,"attachment_file_size":null,"attachment_updated_at":null}]