Home > Iowa Academy of Science > Journals & Newsletters > Proceedings of the Iowa Academy of Science > Volume 36 (1929) > Annual Issue
Document Type
Research
Abstract
Diurnal fluctuations in the acidity of tissue fluids in six to ten week old wheat plants were followed by potentiometric pH measurements of sap freshly expressed from plants at various hours of the day. A daily average fluctuation of 1.5 pH was observed in young plants. The range of pH variation was appreciably extended by increased illumination, maximum acidity occurring dur- ing the early hours of daylight and thereafter falling steadily until the minimum was attained several hours after dark. This degree of pH fluctuation is correlated with variations in the osmotic pressure of expressed sap and thus important in modifying the solubility of nutrients.
Publication Date
1929
Journal Title
Proceedings of the Iowa Academy of Science
Volume
36
Issue
1
First Page
242
Last Page
242
Copyright
©1929 Iowa Academy of Science, Inc.
Language
en
File Format
application/pdf
Recommended Citation
Loehwing, Walter F.
(1929)
"Studies of the Diurnal Fluctuations of Sap Hydrion Concentration in Young Wheat Plants,"
Proceedings of the Iowa Academy of Science, 36(1), 242-242.
Available at:
https://scholarworks.uni.edu/pias/vol36/iss1/38