apheliotropism

[ uh-fee-lee-o-truh-piz-uhm, ap-hee-lee- ]

noun

1. apheliotropic tendency or type of growth.

Word History and Origins

Origin of apheliotropism¹

First recorded in 1875–80; apheliotrop(ic) + -ism

Example Sentences

But from observing the effects of placing plants in the dark, in which case several shoots became in two or three days upright or nearly upright, and when brought back into the light again became rectangularly curved, we believe that the bending is in part due to apheliotropism, apparently somewhat opposed by apogeotropism.

From Project Gutenberg

These internodes were either not old enough, or the light was not sufficiently bright, to induce apheliotropism, for both plants bent slowly towards, instead of from the window during four days.

From Project Gutenberg

As this latter movement occurred in complete darkness, and with peduncles arising from upright and from dependent branches, it cannot be due to apheliotropism or to epinasty, but must be attributed to geotropism.

From Project Gutenberg

Authors speak of positive and negative heliotropism,*—that is, the bending of an organ to or from the light; but it is much more convenient to confine the word heliotropism to bending towards the light, and to designate as apheliotropism bending from the light.

From Project Gutenberg

Apheliotropism.—We succeeded in observing only two cases of apheliotropism, for these are somewhat rare; and the movements are generally so slow that they would have been very troublesome to trace.

From Project Gutenberg