apogeotropism

American  

[ap-uh-jee-o-truh-piz-uhm] / ˌæp ə dʒiˈɒ trəˌpɪz əm /

noun

Biology.

1. growth or orientation away from the earth; negative geotropism.

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apogeotropism British  

/ ˌæpəˌdʒɪəˈtrɒpɪk, ˌæpədʒɪˈɒtrəˌpɪzəm /

noun

1. negative geotropism, as shown by plant stems

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Other Word Forms

• apogeotropic adjective
• apogeotropically adverb

Etymology

Origin of apogeotropism

First recorded in 1875–80; apo- + geotropism

Example Sentences

As it could not have been strongly acted upon by apogeotropism in the above slightly inclined position, we expected that it would have circumnutated, or at least have moved in a zigzag course.

From The Power of Movement in Plants by Darwin, Charles

Besides geotropism and apogeotropism, there is, according to Frank, an allied form of movement, * 'Manual of the Botany of the Northern United States,' 1856, p.

From The Power of Movement in Plants by Darwin, Charles

Except when already standing vertically upwards, both legs of the arch are acted on from the earliest period by apogeotropism.

From The Power of Movement in Plants by Darwin, Charles

The sheath-like cotyledons of Phalaris Canariensis are extremely sensitive to apogeotropism.

From The Power of Movement in Plants by Darwin, Charles

When the pod is nearly ripe, the upper part straightens itself and becomes erect; and this is due to hyponasty or apogeotropism, or both combined, and not to heliotropism, for it occurred in darkness.

From The Power of Movement in Plants by Darwin, Charles