ダイズ幼植物における茎基部からの出液速度に関与する要因

日本作物学会紀事

中野 淳一¹  山口 武視¹  田中 朋之¹  中田 昇¹  馬 啓林¹ 

[1] 鳥取大学

关键词: Bleeding rate;    出液速度;    Glycine max (L.) Merr;    ダイズ;    Respiration rate;    呼吸速度;    Root physiological activity;    根の生理活性;   

DOI  :  10.1626/jcs.73.431

学科分类：农业科学（综合）

来源: Nihon Sakumotsu Gakkai / Crop Science Society of Japan

【 摘 要 】

The bleeding rate from the stem cut end is considered to reflect the root physiological activity since the bleeding is caused by the active water absorption by root. We analyzed factors affecting the bleeding rate using soybean seedlings in order to elucidate the relationship between the root respiration and bleeding rate in soybean plants. The bleeding rate was (1) exponentially decreased when the soil moisture percentage (w/w) dropped from 40% to 30%, (2) higher around 10 a.m. than in the early morning and evening, (3) rapidly declined after stem cutting for 6 hours and was constant thereafter, (4) affected by soil temperature and showed a nearly constant rate at 25 to 30°C, and (5) varied with the plant growth period corresponding to the variation of the root respiration rate showing the maximum level around 45 days after emergence, which is the flower bud initiation stage. When the above variable factors were set constant, the bleeding rate closely correlated with the root respiration rate, which can be expressed as the product of whole root weight and the respiration rate per root weight. Even though the bleeding rate was correlated with the whole root weight more closely than with the respiration rate per root weight, we could demonstrate that a higher respiration rate per root weight resulted in higher bleeding rate when the whole root weight was the same.

【 授权许可】

Unknown