negative heliotropism
[NEG-uh-tiv hee-lee-uh-TROH-piz-um]
nounpl: negative heliotropisms
heliotropismo negativo
1. The tendency of an organism or plant part to move or grow away from light sources, demonstrating aversion to direct sunlight.
The roots of the plant exhibit negative heliotropism by growing downward away from the light above the soil.
As raízes da planta exibem heliotropismo negativo ao crescerem para baixo, afastando-se da luz acima do solo.
2. A phototropic response in which organisms orient themselves in the opposite direction to light stimuli.
Negative heliotropism is common in nocturnal insects that avoid bright environments.
O heliotropismo negativo é comum em insetos noturnos que evitam ambientes iluminados.
This is a specialized scientific term used primarily in botany, biology, and agricultural research contexts. It is part of the standard vocabulary in Portuguese-language scientific education and literature. The concept is fundamental to understanding plant and organism behavior in response to environmental light conditions, with applications in agriculture, horticulture, and ecological studies in both Brazil and Portugal.
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