plants, sense-organs of. 1
Plate XI, Figs. 1 and 2 (cropped to square)
illustrating R. A. Robertson. “The Sense-Organs of Plants,” Communicated October 27, 1909. Transactions of the Edinburgh Field Naturalists’ and Microscopical Society 6 (1907-12) : 164-172
Smithsonian copy, scandate 20110719
Mustard-seeds are planted on a flower-pot saucer standing on its edge. The saucer is kept moist, covered with an inverted pot, and placed in the dark. After a few days the seeds have germinated, and appear as represented in Plate XI, fig. 1. The saucer may now be rotated through any angle, so that the roots lie horizontal, oblique, &c.
Plate XI, fig. 2, shows what happens when the saucer is turned through 180°, and illustrates the positive geotropism of the root and the apo-geotropism of the shoot...
Minta, ex Kristofor Minta and Herbert Pföstl, To Die No More (*, 2008)
tags: flower-pot saucers; geotropism; R. A. Robertson (1909); Kristofor Minta; Herbert Pföstl