Does competition between soybeans and Wild Poinsettia with low-level resistance or susceptibility to glyphosate affect physiology and secondary metabolism?

Authors

  • André da Rosa Ulguim Instituto Rio Grandense do Arroz
  • Dirceu Agostinetto Universidade Federal de Pelotas
  • Claudia de Oliveira Universidade Federal de Pelotas
  • Queli Ruchel Universidade Federal de Pelotas
  • Jessica Dias Gomes da Silva Universidade Federal de Pelotas
  • Leandro Vargas Empresa Brasileira de Pesquisa Agropecuária
  • Luis Antonio Avila Universidade Federal de Pelotas

DOI:

https://doi.org/10.5433/1679-0359.2017v38n3p1133

Keywords:

Photosynthesis, Stomatal conductance, Chlorophyll, Carotenoids, Euphorbia heterophylla L.

Abstract

The Wild Poinsettia (Euphorbia heterophylla L.) has elevated potential to reduce the soybean yield and is a difficult to control plant due to herbicide resistance. The objectives of this study were to determine the changes in the photosynthetic physiological parameters, secondary metabolite levels, cellular damage, and antioxidant system activity in soybean plants and Wild Poinsettia biotypes with a low level of resistance or susceptibility to glyphosate in competition with soybeans. Two replacement series experiments were conducted in a greenhouse under competition between soybeans and the low-level resistant biotype (experiment I) or susceptible biotype (experiment II). The treatments consisted of different proportions of soybean plants and Wild Poinsettia [100:0 (pure stand of soybean), 50:50, and 0:100 (pure stand of Wild Poinsettia)] and different evaluation periods (the 2013/14 and 2014/15 growing seasons). The following parameters were analyzed: the chlorophyll, carotenoid (CRT), total phenol, hydrogen peroxide (H2O2), and lipid peroxidation levels and the catalase (CAT), ascorbate peroxidase (APX), and superoxide dismutase (SOD) enzyme activity. Generally, competition between the soybeans and the Wild Poinsettia biotypes did not alter the photosynthetic parameters or the photosynthetic pigment levels of the crop. For the weed biotypes, competition with the soybeans negatively affected photosynthesis. Greater losses of chlorophylls and CRTs were observed for the susceptible biotype when in competition with soybeans, whereas the opposite trend was observed for the biotype with a low level of resistance. No cellular damage or alterations in antioxidant system enzyme activity was observed, which indicated a lack of oxidative stress.

Downloads

Download data is not yet available.

Author Biographies

André da Rosa Ulguim, Instituto Rio Grandense do Arroz

Engº Agrº, Dr., Instituto Rio Grandense do Arroz, IRGA, Cachoeirinha, RS, Brasil.

Dirceu Agostinetto, Universidade Federal de Pelotas

Engº Agrº, Prof. Dr., Faculdade de Agronomia Eliseu Maciel, Universidade Federal de Pelotas, UFPel, Pelotas, RS, Brasil.

Claudia de Oliveira, Universidade Federal de Pelotas

Engª Agrª, M.e, Discente, Programa de Pós-Graduação em Fitossanidade, UFPel, Pelotas, RS, Brasil.

Queli Ruchel, Universidade Federal de Pelotas

Engº Agrº, M.e, Discente, Programa de Pós-Graduação em Fitossanidade, UFPel, Pelotas, RS, Brasil.

Jessica Dias Gomes da Silva, Universidade Federal de Pelotas

Discente de Graduação, Faculdade de Agronomia Eliseu Maciel, UFPel, Pelotas, RS, Brasil.

Leandro Vargas, Empresa Brasileira de Pesquisa Agropecuária

Engº Agrº, Dr., Embrapa Trigo, Passo Fundo, RS, Brasil.

Luis Antonio Avila, Universidade Federal de Pelotas

Engº Agrº, Prof. Dr., Faculdade de Agronomia Eliseu Maciel, Universidade Federal de Pelotas, UFPel, Pelotas, RS, Brasil.

Downloads

Published

2017-06-13

How to Cite

Ulguim, A. da R., Agostinetto, D., Oliveira, C. de, Ruchel, Q., Silva, J. D. G. da, Vargas, L., & Avila, L. A. (2017). Does competition between soybeans and Wild Poinsettia with low-level resistance or susceptibility to glyphosate affect physiology and secondary metabolism?. Semina: Ciências Agrárias, 38(3), 1133–1144. https://doi.org/10.5433/1679-0359.2017v38n3p1133

Issue

Section

Articles

Most read articles by the same author(s)

Similar Articles

You may also start an advanced similarity search for this article.