モエジマシダ胞子の発芽における砒素耐性および前葉体の砒素吸収能力に関する実験的研究

概要

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The sporophyte of the fern Pteris vittata is known to be a hyperaccumulator of arsenic in its fronds to>2.3% of its dry weight. However, very little has been stated about hyperaccumulation of arsenic by gametophytes of P. vittata. Here we report that gametophytes of P. vittata from Beppu City and Okinawa Island in western Japan hyperaccumulate arsenic in a similar manner to that observed in the sporophyte. The gametophytes from the Beppu City are able to grow in medium containing 10mM arsenate and accumulate>1.8% of their dry weight as arsenic. The results suggest gametophytes of P. vittata also have a great potential to be used for phytoremediation and the relative ability of tolerance and accumulation show some local variation of their sources.
愛媛大学の論文