Studies on the Effect of the Relative Humidity of the Atmosphere on the Growth and Physiology of Rice Plants : X. Effect of ambient humidity on the translocation of assimilated 13C in leaves

Japanese Journal of Crop Science

Naomichi TANAKA¹  Shiro TAKEUCHI¹  Hiroyoshi CHUJO¹  Osamu TANAKA¹  Toshikatsu OKUMURA¹  Gen-ichi HIRAI¹ 

关键词: ^<13>CO2 feeding study;    光合成産物;    Photosynthetic product;    重炭素トレーサー法;    Relative humidity;    水稲;    Rice;    大気湿度;    Translocation;    転流;   

DOI  :  10.1626/jcs.65.460

学科分类：农业科学（综合）

来源: Nihon Sakumotsu Gakkai / Crop Science Society of Japan

【 摘 要 】

^<13>C-labelled CO2 was fed to rice seedlings for 60 min in the light under low (60%) or high (90%) humidity. The amount of 13C assimilated by the leaves under high humidity was much greater than that by the plants under low humidity. The 13C-labelled CO2 was fed to the plants for 60 min at 75% humidity and then the plants were kept at 60 or 90% humidity under illumination. In 10 hours after the end of 13C feeding, the amount of 13C and 13C content increased in the roots of the plants kept under high humidity. On the other hand, they increased in the 6th leaf and the transfer of 13C to the roots was very low in the plants kept under low humidity. These results support our previous observations that dry matter production of the plants grown under high humidity was higher than that of the plants grown under low humidity, that the dry matter increase of roots in the plants grown under high humidity was higher than that of the plants grown under low humidity and that the stress caused by low humidity increased the partition of dry matter to the top of plants.

【 授权许可】

Unknown