The report deals with the far-reaching and critical shifts in water and salt content which occur during the flowering phase of development in such annuals as hemp, beans, corn and wheat. This phase is marked by a sudden increase in transpirational water loss and the coincident diminution in the rate of water and salt absorption by the roots. Though the progressive tissue dehydration results in the increase of the osmotic solutes in the cell sap, the resultant rise in osmotic pressure does not serve to prevent continued water loss. This stage is also marked by appreciable hydrolysis of the insoluble carbohydrates and proteins in the leaves, as well as by a profound redistribution of mineral elements within the entire plant. The data suggest that some of these changes are concerned with the inception of flower primordia and to some extent determine the number of flowers developed and fruits which set. The flowering phase, though of brief duration, is the most significant in determining the subsequent development of the entire plant. The nutritional physiology of the flowering phase is distinctly different from that of the preceding vegetative and the subsequent fruiting physiology.
Proceedings of the Iowa Academy of Science
© Copyright 1941 by the Iowa Academy of Science, Inc.
Loehwing, Walter F.
"Water and Salt Balance in the Growth of Annual Plants (Abstract),"
Proceedings of the Iowa Academy of Science: Vol. 48:
, Article 27.
Available at: https://scholarworks.uni.edu/pias/vol48/iss1/27