昇汞および硝酸銀によるマツ種子の暗発芽促進2

The dark germination of Pinus densiflora seed is stimulated by the treatment of 0.1% mercuric chloride or silver nitrate for short periods of time ante-sowing. The treated seeds overcame the inhibition of far-red illumination to some degrees. This treatment was not effective for the decoated seed, but the efficiency was found in the rubbed seed, both tips of which was punctured by rubbing on sand paper. The toxicity, that silver nitrate of higher concentration showed, was released by coumarin or o-coumaric acid rather in the intact seed. In both intact and rubbed seeds, oxalic or citric acid, which was used for comparison with the phenolics, abated the toxicity. Oxygen uptake in the seeds, treated with mercuric chloride or silver nitrate, was suppressed before the germination. From these results, the mechanism of the heavy metal stimulation was discussed in relation to the removal of inhibitors in the seed coats.アカマツ種子の暗発芽は0.1％昇汞水または硝酸銀溶液の短時間前処理によって促進される。処理された種子は赤外線照射抑制にもある程度打ちかった。この処理法は剥皮種子には有効でないが，種子の両端を紙ヤスリですって穴をあけた種子に有効であった。濃度の高い硝酸銀が示す毒性は，もとのままの種子に，クマリンやo－クマール酸添加によってゆるめられ，シュウ酸やクエン酸はすった種子およびもとのままの種子両者にてその毒性を減少させた。昇汞や硝酸銀で処理した種子の酸素吸収は発芽前おさえられる。これらの結果をもとに，抑制物質の除去と関係して，これら重金属による発芽促進のメカニズムを論じた