水稲種子の水分含量を低下させることによる温湯消毒時の高温耐性の向上

日本作物学会紀事

岡崎 直人²  山田 哲也²  村田 和優¹  佐野 直人²  三田村 芳樹²  金勝 一樹² 

[1] 富山県農林水産総合技術センター農業研究所;東京農工大学農学部

关键词: Heat stress tolerance;    高温耐性;    Hot water disinfection;    温湯消毒;    Rice;    Seed disinfection;    種子消毒;    Seed water content;    種子の水分含量;   

DOI  :  10.1626/jcs.82.397

学科分类：农业科学（综合）

来源: Nihon Sakumotsu Gakkai / Crop Science Society of Japan

【 摘 要 】

Hot water disinfection of rice seeds is a clean farming technique that does not involve harmful chemical compounds. A higher temperature would have stronger disinfecting power, but would also lower seed germination ability. Thus it is important to increase the heat tolerance of the seeds of many cultivars. In the present report, we examined the effects of reducing the water content of seeds on their heat tolerances. The water content of rough rice of “Nipponbare” and “Koganemochi” was 14.7% and 15.0% respectively, and the germination rate of these seeds after immersion in hot water at 66°C for 10 minutes was less than 90%. However, when the water content of the seeds was reduced to 9-10% before the hot water treatment, more than 90% of the seeds germinated. Such an effect of seed drying before the hot water treatment was confirmed in “Hitomebore” and brewer’s rice “Tominokaori”. These results indicate that seed drying before hot water disinfection is effective for strengthening their tolerance to a high temperature.

【 授权许可】

Unknown