noun
geotropism; gravitropism
Scientific term for a plant's directional growth response to gravity; roots show positive geotropism (growing downward), shoots show negative geotropism (growing upward).
根の向地性によって、根は重力の方向に伸びる。
Due to geotropism, roots grow in the direction of gravity.
向地性は植物の成長に不可欠な性質で
Geotropism is an essential property for plant growth.
走地性 refers to taxis (movement) toward or away from gravity in motile organisms, whereas 向地性 is tropism (growth) in plants.
Composed of 向 (toward), 地 (earth/ground), and 性 (nature/property), literally 'earthward tendency'. The term is a direct calque from Western scientific vocabulary for geotropism.