Alleviation of Spikelet Sterility of Rice Caused by High Temperatures by Applying Auxin and Jasmonic Acid

日本作物学会紀事

Sachio Maruyama^2¹  Takahiro Mitsui^1² 

[1] Fac. of Life and Environ. Sci., Univ. of Tsukuba^2;Grad. Sch. of Life and Environ. Sci., Univ. of Tsukuba^1

关键词: Auxin;    High temperature;    Jasmonic acid;    Rice;    Spikelet sterility;   

DOI  :  10.1626/jcs.88.182

学科分类：农业科学（综合）

来源: Nihon Sakumotsu Gakkai / Crop Science Society of Japan

【 摘 要 】

Spikelet sterility is increased under high temperatures at the reproductive stage in rice (Oryza sativa L.). We thus investigated whether plant hormones, such as auxin and jasmonic acid, alleviate spikelet sterility caused by high temperatures at the booting stage. Rice cultivars, Akitakomachi, and Koshihikari, were grown in pots, and the plants were exposed to 39ºC day/25ºC night for 5 successive days at the booting stage. The entire shoots were sprayed with auxin (IAA) or jasmonic acid (JA) solution before and during the high-temperature (39ºC) treatment four times in total. Plants grown at 25ºC day/25ºC night were similarly sprayed with plant hormones to serve as controls. The panicles, headed 5 to 6 days after the treatment, were sampled at maturity and the percentage of sterility was determined. The application of 10–7 M IAA alleviated spikelet sterility caused by the high temperature in Akitakomachi, while JA had little alleviation effect. In contrast, the application of neither IAA nor JA had any significant alleviation effect on spikelet sterility caused by the high temperature in Koshihikari.

【 授权许可】

CC BY