オオムギの褐色雪腐病抵抗性に及ぼす低温順化処理条件の影響

日本作物学会紀事

竹中 重仁¹  湯川 智行¹  三浦 重典¹  渡邊 好昭¹ 

[1]中央農業総合研究センター

关键词: Barley;    オオムギ;    Cold acclimation;    低温順化;    Light;    å…‰;    Resistance;    抵抗性;    Snow damage;    雪害;    Snow mold;    雪腐病;   

DOI  :  10.1626/jcs.76.273

学科分类：农业科学（综合）

来源: Nihon Sakumotsu Gakkai / Crop Science Society of Japan

【 摘 要 】

The effects of duration and light conditions of cold acclimation (2°C,12h photoperiod) and environmental condition after cold acclimation on the resistance to Pythium snow rot in barley were studied. The resistance to the spread of symptoms was measured by legion length extended from inoculation point inoculated with a Pythium snow rot pathogen, P. paddicum on the leaf blade. The duration of cold acclimation significantly affected the resistance to snow rot. The significant increase in the resistance was observed after 7 days of cold acclimation treatment. The resistance was further increased by 14 days of cold acclimation, but further prolongation of the cold acclimation period from 14 to 28 days had no effect. During 7-day cold acclimation period, light was necessary to increase the resistance, although light intensity and color had no influence. The resistance attained by the 7-day cold acclimation was nullified by a subsequent exposure to 15°C in darkness for 14 days or cold and dark condition (0.5°C, darkness for 28 days).

【 授权许可】

Unknown