@article{oai:kpu.repo.nii.ac.jp:00005052,
 author = {山田, 秀和 and Yamada, Hidekazu},
 journal = {京都府立大學學術報告. 農學, The scientific reports of Kyoto Prefectural University. Agriculture},
 month = {Nov},
 note = {一般に植物のフッ素含有量は少なく数ppm程度であるのに対し, ツバキ科植物のチャ, ツバキ, サザンカなどの数種及びミツバウツギ科植物のゴンズイには数100&acd;数1000ppmのフッ素の蓄積が知られている。本研究はツバキ科植物を例に植物のフッ素吸収とその蓄積を, 土壌-植物系を移行するフッ素の化学形態の面から検討したものである。フッ素集積植物は同時にアルミニウム集積植物であること, 及びアルミニウムはフッ素と極めて親和性の強い元素であることから, 植物のフッ素及びアルミニウム含有量の関連性を調査し, フッ素集積植物のフッ素とアルミニウム含有量間には個体間, 個体内を通じて常に密接な関連性の成立することを明らかにした。そしてフッ素集積植物で認められるフッ素とアルミニウム含有量間の関連性を, 次の2つの仮説を導入すると総合的に理解できることを指摘した。仮説(1)土壌中の可溶性フッ素は, フッ素・アルミニウム錯体の形態で存在する。(2)フッ素集積植物は, フッ素・アルミニウム錯体の形態でフッ素及びアルミニウムを吸収する。仮説(1)を証明するため, 土壌の可溶性フッ素の溶出挙動を検討し, pH 5以下の酸性土壌中にAl^<3+>のほかAlF^<2+>, AlF_2^+のフッ素・アルミニウム錯体の存在することを明らかにした。またpH 5以上の土壌の可溶性フッ素は, 主としてヒドロキシフルオロアパタイトCa_<10>(PO_4)_6F_x(OH)_<2-x>(X<2)の形態で存在するものと推定した。次に仮説(2)を, チャ幼植物の水耕実験によって検討し, フッ素集積植物によるAlF^<2+>, AlF_2^+の吸収が可能であることを示した。すなわち, ツバキ科のフッ素集積植物は, フッ素及びアルミニウムを土壌中からAl^<3+>, AlF^<2+>, AlF_2^+のフッ素・アルミニウム錯体の形態で吸収, 蓄積しているものと結論した。, It is well known that some plants belonging to Theaceae, such as tea plants, selectively accumulate fluorine, whereas fluorine contents of the other plants is very low. But little is known about the accumulation mechanism of fluorine by Theaceae. Some plants belonging to Theaceae also are the accumulator plants of aluminium. For example, tea plants contain high levels of fluorine and aluminium in the leaves. (Leaves usually contain much more fluorine and aluminium than other parts of plants.) It is noticeable that same plants show high fluorine and aluminium contents. Judging from strong chemical reactivity between fluorine and aluminium, it is assumed that fluorine absorption by plants is closely related to aluminium absorption by plants. Therefore, the absorption of fluorine by Theaceae from soils and the chemical state of the absorbed fluorine were studied in relation to absorption of aluminium by the plants. The results are summarized as follows. It was found out that the plants enriched in fluorine always showed high aluminium contents, whereas the plants enriched in aluminium did not always show high fluorine contents. And the fluorine contents of the accumulator plants was always found significantly and positively correlated with the aluminium contents of the plants. The ratios of fluorine to aluminium contents of leaves (F/Al ratio) were about the same at different positions on the stem of the plants. And the F/Al ratio of leaves did not show difference among the varieties of the plants growing at the same site, but showed significantly difference among the growing site. Therefore, in order to explain the results mentioned above, the author proposed the following hypotheses. (a) Soluble fluorine of soils exist as fluoro-aluminium complexes, such as AlF^<2+> and AlF_2^+. (b) Accumulator plants of fluorine absorb fluorine and aluminium in the forms of AlF^<2+>, AlF_2+ and Al^<3+>. To prove the hypothesis (a), the amounts of soluble fluorine and aluminium of tea garden soils and fluoride and aluminium of tea garden soils and fluoride-polluted soils were determined with various extracting solutions. And it was estimated that soluble fluorine in the soils existed in the forms of fluoro-aluminium complexes or hydroxy-fluorapatite Ca_<10>(PO_4)_6F_x(OH)_<2-x>(x<2). When soil pH was high, most of the soluble fluorine existed as hydroxyfluorapatite, and with decreasing soil pH, hydroxyfluorapatite was dissolved by Al^<3+> forming fluoro-aluminium complexes. Subsequently, the absorption of fluoro-aluminium complexes by plants (hypothesis (b)) was confirmed by the water culture of tea plants. From the results described above, the author might conclude that soluble soil fluorine existed as fluoro-aluminium complexes, and the accumulator plants of fluorine absorbed fluorine and aluminium in the forms of Al^<3+>, AlF^<2+> and AlF_2^+ from soils.},
 pages = {138--170},
 title = {ツバキ科植物のフッ素吸収に関する生物地球化学的研究(農芸化学部門)},
 volume = {32},
 year = {1980},
 yomi = {ヤマダ, ヒデカズ}
}