geotropism

Japanese: geotropism
geotropism

…Bending toward the stimulus is called positive tropism, while bending away from the stimulus is called negative tropism. Bending movement occurs due to the difference in growth between the side facing the stimulus and the opposite side, and depending on the type of stimulus, it is classified as phototropism, geotropism, thermotropism, etc. The existence of phototropism was already pointed out by C. Darwin in 1880 based on his observations of rice coleoptiles. …

*Some terminology explanations that mention "geotropism" are listed below.

Source | Heibonsha World Encyclopedia 2nd Edition | Information

Japanese:

…刺激方向への屈曲を正の屈性,刺激源から遠ざかろうとする屈曲を負の屈性とよぶ。屈曲運動は刺激源に面する側とその反対側での生長の差によっておこり,刺激の種類に応じて屈光性phototropism,屈地性geotropism,屈熱性thermotropismなどに分けられる。屈光性の存在は,すでに1880年にC.ダーウィンがイネの子葉鞘(しようしよう)での観察にもとづいて指摘している。…

※「geotropism」について言及している用語解説の一部を掲載しています。

出典|株式会社平凡社世界大百科事典 第2版について | 情報

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