Field Studies of Internal Moisture Relations of the Corn Plant1

The results of this study agree with the hypothesis that the electrical conductivity of corn stem tissue is primarily related to hydration of the cell wall. Plant stem resistance measurements taken before 8:00 a.m. show a carry‐over effect of moisture stress experienced by the plant during the preceding 24‐hour period or longer. Relative turgidity measurements of corn leaves taken at the same time did not show a marked carry‐over effect of internal moisture stress.