Studies on Roots. II. Effects of Coumarin, Scopoletin and Other Substances on Growth

Anatomical responses of root tips to boron deficiency II. Effect of boron deficiency on the cellular growth and development in root tips

“…Abnormal enlargement of root tips by the swelling of cells had been observed in the root tips of Avena (17) and Mung bean (18) treated by coumarin. The external symptoms of these cases are very similar to boron deficiency symptoms and the accumulation of scopoletin glucoside (one of the coumarin derivatives) had been reported in boron-deficient tobacco leaves ( 19).…”

Studies on Roots. Iii. An Analysis of Root Growth in Phleum Pratense Using Photomicrographic Records

“…The cellular pattern was determined from cell length measurements on fixed material, and an attempt was made to establish the cell division pattern in the epidermis from mathematical calculations based upon the assumption that the cellular pattern along the root remains constant. The first part of the problem was worked out and reported in an earlier paper of this series (Pollock et al, 1954). The roots were marked with lamp black.…”

“…Our problem was, first, to perfect methods for culturing the roots under conditions favorable to rapid growth, which would permit microscopic examination and manipulation of the environment during the experiment, and second, to develop a technique for scanning the surface of the root with a series of overlapping photographs of adequate magnification. The first part of the problem was worked out and reported in an earlier paper of this series (Pollock et al, 1954).…”

Effects of Indoleacetic Acid and Kinetin on Scopoletin-Scopolin Levels in Relation to Growth of Tobacco Tissues in Vitro

“…The role of scopoletin as a natural growth regulator in roots has been studied by Goodwin and his students (16) and in tissue cultures as a substitute for IAA by Montaldi and Skoog (15). No determination of the effect of scopolin on growth has been reported, but it is of interest that the root-inhibiting properties of esculetin are not shared by its glucoside esculin.…”