RESPONSES OF PLANT CELLS TO HERBICIDES

Abstract

The visible effects of 2,4-dichlorophenoxyacetic acid, 4,6-dinitro-2-sec.-butylphenol, pentachlorophenol, and O-isopro-pyl N-phenyl carbamate on several types of tissues are descr. The attempt is made to group the responses under the headings of (a) stimulation, (b) retardation (reversible injury), and (c) premortal (irreversible injury). Observation of vacuolar contraction, vacuolation, granulation, plasmolytic behavior and other phenomena indicate increasing cytoplasmic hydration during phase (a), declining toward the end of phase (b), and a marked decrease in (c).