イネの穂の乾物増加と穂への炭水化物の転流に関わる呼吸効率の品種間差異

日本作物学会紀事

中井 清裕²  平井 儀彦²  沼 健太郎¹  津田 誠² 

[1] 岡山大学農学部;岡山大学大学院自然科学研究科農学系

关键词: Carbohydrate mobilization;    転流;    Dark respiration;    暗呼吸速度;    Reserved carbohydrate;    貯蔵炭水化物;    Rice;    イネ;    Ripening period;    登熟期;    Varietal difference.;    品種間差異;   

DOI  :  10.1626/jcs.79.53

学科分类：农业科学（综合）

来源: Nihon Sakumotsu Gakkai / Crop Science Society of Japan

【 摘 要 】

The reduction of carbohydrate consumption by the dark respiration at the ripening stage may increase the yield of rice. To clarify the influence of the varietal difference in the ratio of the dry-matter decrease in stem and leaf sheath to the dry-matter increase in panicle (ΔS/ΔE), which is used as an index of the remobilization of carbohydrate, on the dark respiration in shoot, and to clarify the varietal difference in the cost of panicle growth, we examined the dark respiration in the shoot and panicle using four and two rice varieties with different ΔS/ΔE in 2000 and 2003, respectively. The ΔS/ΔE in Nanjing 11 at ripening periods was higher than that of Tainung 67 in both years. The relationship between the dark respiration in the shoot and mobilization of carbohydrate was regressed to a line in both years. On the other hand, the rate of dark respiration in panicle increased with panicle growth in all varieties, but the cost of the dark respiration for panicle growth was lower in Tainung 67 than in Nanjing 11. These results showed that the varietal difference in the remobilization of reserved carbohydrate did not affect the cost of dark respiration for remobilization in shoot, and that the varietal difference in the cost of panicle growth was large.

【 授权许可】

Unknown