In undertaking as a problem for research, the effects of different substances in solution upon the rate of cell enlargement, it was planned to study the development of root hairs in aqueous media, Brink has used pollen tubes in a similar way; and there are numerous studies of the rate of enlargement of multicellular tissues of the higher plants when the latter were supplied with various nutrient or toxic substances. Robbins has used detached roots for his investigations along this line. The root hairs present some advantages in that they are single cells so largely enveloped by external media that it is likely that they are much affected by it, and to a much less extent affected by the substances which come from the remainder of the plant. Furthermore the root hairs of most plants are ordinarily of uniform diameter, so that the increase in length is an index of the increase in cell volume. Finally the measurement of the length of root hairs can be readily and accurately made with the eyepiece micrometer, especially in view of the definite base line which the surface of the root affords.
Proceedings of the Iowa Academy of Science
©1925 Iowa Academy of Science, Inc.
Farr, Clifford H.
"The Formation of Root Hairs in Water,"
Proceedings of the Iowa Academy of Science, 32(1), 157-165.
Available at: https://scholarworks.uni.edu/pias/vol32/iss1/24