57. エテホンとジベレリンの併用処理が水稲湛水直播栽培における幼植物の成長に及ぼす影響

概要

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Seedling establishment is one of the most important agronomic traits in direct seeding rice cultivations. We investigated the effects of two plant growth regulators (PGRs), like gibberellin (GA) and ethephon (ET) on the seedling growth under growth chamber and flooded soil conditions. Seedling growth was increased by the single treatment of GA or ET over that of the control. However, effects of the combined applications of GA and ET were more pronounced than that of GA or ET alone. The growth of different organs of rice seedling, such as coleoptiles, first leaves and second leaves were also increased by the PGRs treatment. In conclusion, high seedling establishment rate in the direct seeding cultivation will be possible by using the proper combinations of PGRs. Effects of PGRs on the nutrients uptake by rice seedling will be also assessed.
植物化学調節学会の論文
2003-10-10