TITLE:
Phytotoxic Effects of 4-Chlorophenol and 2,4-Dichlorophenol in the Germination of Seeds of Phaseolus vulgaris and Zea mayz
AUTHORS:
Irasema Pérez-Portuondo, Manuel Serrat-Díaz, Rosa M. Pérez-Silva, Arelis Ábalos-Rodríguez
KEYWORDS:
Chlorophenol, Bean, Maize, Phytotoxicity, Seed Germination
JOURNAL NAME:
American Journal of Plant Sciences,
Vol.12 No.4,
April
25,
2021
ABSTRACT: Soil contaminated with pesticides may reduce plant
development due to their toxicity. The aim of this study was to evaluate the
influence on the germination of Zea mayz and Phaseolus vulgaris of the two
main intermediates of the 2,4-D degradation, which are 4-chlorophenol (4-CP)
and 2,4-dichlorophenol (2,4-DCP). Maize and bean seeds were treated with distilled
water (control treatment) and increased concentrations of 4-CP and 2,4-DCP
(0.006, 0.1, 1.0, 1.5 g·L-1). It was assessed seed
germination and calculated various parameters. The parameter most affected by
chlorophenols was the index of germination rate, being the P. vulgaris seeds most affected. 2,4-DCP was the compound most
toxic for both plants. The germination index was dependent doses for both plant models tested. The results
indicate that 4-CP and 2,4-DCP affected the index of germination rate
but not influenced in other parameters of germination of Zea mayz and Phaseolus
vulgaris. Maize was most tolerance to
both chlorophenols in the assessed concentrations. 2,4-DCP was the most
toxic of chlorophenols tested.