Photosynthesis of Daughter-Tuber Leaves in Eddoe Population and Its Contribution to Canopy Photosynthesis and Tuber Yield

Japanese Journal of Crop Science

Hideki SUGIMOTO¹ 

关键词: Canopy photosynthesis;    塊茎収量;    Closed chamber system;    個体群光合成;    ^<13>CO2;    サトイモ;    Colocasia esculenta(L.) Schott;    Daughter tuber leaves;    子イモ葉身;    Eddoe;    閉鎖系同化箱;    Tuber yield;   

DOI  :  10.1626/jcs.70.92

学科分类：农业科学（综合）

来源: Nihon Sakumotsu Gakkai / Crop Science Society of Japan

【 摘 要 】

Three types or eddoe plants(Colocasia esculenta(L.) Schott), i.c., daughter-tuber type(cv. Uhan and Ishikawawase), mother-and daughter-tuber type(cv. Akame), and mother-tuber type(cv. Taiwan-imo), we recultivated in a drained paddy field. The daughter-tuber leaves of each cultivar were removed to estimate the role of the leaves. The rate of canopy photosynthesis of cv. Uhan was measured in mid-October using a closed chamber system, and then plant was fed with 13CO2 to estimate the contribution ratio of daughter-tuber leaves to total canopy photosynthesis. The rate of canopy photosynthesis in the plant with and without daughter-tuber leaves was 24.6 and 17.5μmol m-2S-1, respectively. The ccontribution ratio of the photosynthesis of the daughter-tuber leaves to total canopy photosynthecs is was 29.1%. Total tuber yield in control plants was 16% higher and the markctable tuber yield was 34% higher than those in the plants without daughter-tuber leaves. The photosynthate of daughter-tuber leaves greatly contributed to the enlargement of each tuber, and hence tuber weight per plant.

【 授权许可】

Unknown