TERMIUM Plus^®

Record 1,  Textual support,  English

Record number: 1, Textual support number: 1 DEF

The tendency of an organism to turn or move toward light ...  1, record 1, English, - positive%20phototropism

Record 1,  Textual support,  French

Record number: 1, Textual support number: 1 DEF

Propriété que détiennent certaines cellules ou certains organismes de se déplacer en direction de la source lumineuse.  2, record 1, French, - phototropisme%20positif

Record number: 1, Textual support number: 1 OBS

Source MVISI-F : Le nouveau dictionnaire de la vision par Michel Millodot, Médiacom Vision Éditeur, 1997.  2, record 1, French, - phototropisme%20positif

Record 1,  Textual support,  Spanish

Record 2,  Textual support,  English

Record number: 2, Textual support number: 1 CONT

... plants can change their direction of growth (tropism). Plant roots grow away from the light (called "negative phototropism") but toward gravity (called "positive gravitropism"), whereas plant shoots grow toward light (called "positive phototropism") and away from gravity (called "negative gravitropism").  2, record 2, English, - positive%20phototropism

Record number: 2, Textual support number: 2 CONT

If, as is the most common response in stems, the growth is toward the light, it is known as "positive phototropism". ... and, since this is away from gravity, it is known as "negative gravitropism". Both responses are moderated by auxin. In the case of light, the auxin moves away from the side toward the light and the cells on that side elongate more, causing the stem to bend toward the light. In the case of gravity and the root, the cells respond to increased auxin by decreasing elongation resulting in the root growing down in response to increased auxin by decreasing elongation just opposite to that of stems.  3, record 2, English, - positive%20phototropism

Record 2,  Textual support,  French

Record number: 2, Textual support number: 1 CONT

La tige ralentit sa croissance du côté éclairé, ce qui a pour effet de diriger son sommet vers la lumière : c'est le phototropisme positif.  1, record 2, French, - phototropisme%20positif

Record 2,  Textual support,  Spanish