Environmental and physiological factors that affect the efficacy of herbicides that inhibit the enzyme protoporphyrinogen oxidase: a literature review

Matzenbacher, F.O.; Vidal, Ribas Antônio; Merotto, Aldo; Trezzi, Michelangelo Müzell

doi:10.1590/s0100-83582014000200024

Cited by 36 publications

(24 citation statements)

References 29 publications

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“…Rice plants treated with PROTOX inhibitors of several chemical groups (Acifluorfen, oxyfluorfen, carfentrazone-ethyl and oxadiazon) showed an increase of SOD, CAT and APX activity (60, 17 and 68%, respectively) compared to nontreated plants (Jung et al, 2008). However, the impact of the antioxidant system in the effectiveness of the herbicides inhibitors of PROTOX is still complex (Matzenbacher et al, 2014).…”

Section: Resultsmentioning

confidence: 99%

Biochemical and Physiological Changes in Rice Plants Due to the Application of Herbicides1

et al. 2016

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-The application of herbicides, even if selective, can cause biochemical and physiological changes, resulting in oxidative stress. This stress comes from the accumulation of reactive oxygen species produced due to exposure to the herbicide. However, plants have developed defense strategies, which can be enzymatic or non-enzymatic. The objective of this study was to evaluate the morphological and metabolic changes such as photosynthetic parameters, oxidative damage and antioxidant enzyme activity of rice plants after applying herbicides. For this, a study was conducted in a greenhouse and laboratory and the treatments consisted of application of imazapic + imazapyr, quinclorac, bentazon, cyhalofop-butyl, penoxsulan, bispyribac-sodium and carfentrazone-ethyl, in addition to control without herbicide. The phytotoxicity in plants was strong and there was a reduction in photosynthesis, stomatal conductance and efficiency of water use in plants treated with carfentrazone-ethyl. Furthermore, the application of carfentrazone-ethyl resulted in lower chlorophylls and carotenoids and increased lipid peroxidation and proline accumulation. Changes in the activity of enzymes belonging to the antioxidant system were inspected by applying herbicides. The application of herbicide alters the physiology of rice plants, triggering responses to oxidative stress, which are more pronounced when used carfentrazone-ethyl. Keywords:Oryza sativa, oxidative stress, lipid peroxidation, selectivity. RESUMO -

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Section: Resultsmentioning

confidence: 99%

Biochemical and Physiological Changes in Rice Plants Due to the Application of Herbicides1

et al. 2016

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“…As a result, weeds might need to evolve a stronger mutation or multiple mechanisms to gain robust resistance. On the other hand, because the efficacy of PPO inhibitors is dependent on plant size (Dayan et al 2017;Wuerffel et al 2015aWuerffel et al , 2015b) and can be affected by different environmental and physiological conditions (Matzenbacher et al 2014), it is also possible that bigger plants with known PPX2 mutations could still survive saflufenacil. Therefore, it is strongly recommended that farmers always spray weeds at smaller sizes to avoid reduced activities and potential risk of resistance development.…”

Section: Three Known Ppx2 Mutations Do Not Always Lead To Resistancementioning

confidence: 99%

Differences in efficacy, resistance mechanism and target protein interaction between two PPO inhibitors in Palmer amaranth (Amaranthus palmeri)

Goldsmith

Pawlak

et al. 2020

Weed Sci

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A weed survey was conducted on 134 Palmer amaranth (Amaranthus palmeri S. Watson) populations from Mississippi and Arkansas in 2017 to investigate the spread of resistance to protoporphyrinogen oxidase (PPO) inhibitors using fomesafen as a proxy. Fomesafen resistance was found in 42% of the A. palmeri populations. To investigate the resistance basis of different PPO inhibitors, we further characterized 10 representative populations by in planta bioassay in a controlled environment and molecular characterizations (DNA sequencing and TaqMan® gene expression assay). A total of 160 plants were sprayed with a labeled field rate (1X) of fomesafen or salfufenacil and screened for the presence of three known resistance-endowing mutations in the mitochondrial PPX2 gene (ΔGly-210, Arg-128-Gly, Gly-399-Ala). To compare the potencies of fomesafen and saflufenacil, dose–response studies were conducted on two highly resistant and one sensitive populations. The interaction of the two herbicides with the target protein harboring known PPX2 mutations was also analyzed. Our results showed that: (1) 90% of the fomesafen- or saflufenacil-resistant plants have at least one of the three known PPX2 mutations, with ΔGly-210 being the most prevalent; (2) saflufenacil is more potent than fomesafen, with five to nine times lower resistance/susceptible (R/S) ratios; (3) fomesafen selects for more diverse mutations, and computational inhibitor/target modeling of fomesafen suggest a weaker binding affinity in addition to a smaller interaction volume and volume overlap with the substrate protoporphyrinogen IX than saflufenacil. As a result, saflufenacil shows reduced sensitivity to PPX2 target-site mutations. Results from current study can help pave the way for designing weed management strategies to delay resistance development and maintain the efficacy of PPO inhibitors.

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“…observada ao fomesafen pode ser devido ao mecanismo de detoxificação desses herbicidas inibidores da Protox pela atividade das enzimas antioxidantes como superóxido dismutases (SOD), catalase (CAT), peroxidases (POD), peroxidase de ascorbato (APX), glutationa peroxidase (GPX) e glutationa redutase (GR) (GULLNER; DODGE, 2000;GEOFFROY et al, 2002, SUGIYAMA;SEKIYA, 2005;JUNG et al, 2008;MATZENBACHER et al, 2014). Essas enzimas minimizam o efeito de inibidores da Protox por reverter o estresse oxidativo causado pelo herbicida devido à alta produção de espécies reativas de oxigênio.…”

Section: Pré-plantiounclassified

Seletividade De Herbicidas Aplicados Em Pré E Pós-Transplantio De Abóbora Japonesa

Carneiro

Fonseca²,

Sousa³

et al. 2020

RBHerbicidas

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O lento crescimento inicial e o baixo porte da abóbora favorecem o estabelecimento de plantas daninhas nas áreas de cultivo, sendo necessário o manejo adequado para não haver redução da produtividade. Entretanto, atualmente não há herbicidas registrados para a cultura da abóbora. Dessa forma, objetivou-se verificar a seletividade de herbicidas em pré e pós-plantio de mudas de abóbora japonesa. Os experimentos foram conduzidos em delineamento de blocos casualizados com quatro repetições. Para as aplicações em pré-plantio e pósplantio, os tratamentos foram compostos pelos herbicidas: flumioxazin (30 g i.a. ha-1), oxyfluorfen (240 g i.a. ha-1), clomazone (600 g i.a. ha-1), fomesafen (250 g i.a. ha-1), fluzifop-p-butílico (125 g i.a. ha-1) e o controle. Além disso, em pré-plantio foi testado um tratamento com o paraquat (400 g i.a. ha-1). Avaliou-se a intoxicação visual 7, 14 e 21 dias após a aplicação dos herbicidas (DAA). Aos 21 DAA foi avaliado a altura de planta, diâmetro de caule, número de folhas e matéria seca de parte aérea, raiz e total. Os herbicidas oxyfluorfen (240 g i.a. ha-1), fomesafen (250 g i.a. ha-1), fluzifop-p-butílico (125 g i.a. ha-1) e paraquat (400 g i.a. ha-1) apresentaram alta seletividade em pré-plantio de mudas de abóbora japonesa, com baixa intoxicação (entre 0 e 4%), menores perdas de matéria seca e menor variação dos parâmetros de crescimento das plantas. Em pós-plantio, o flumioxazin (30 g i.a. ha-1) não apresentou redução significativa de matéria seca e das variáveis de crescimento, mas causou intoxicação superior a (24%). O fluzifop -p-butílico (125 g i.a. ha-1) e o fomesafen (250 g i.a. ha-1) mostraram maior seletividade (intoxicação entre 0 e 4%) em pós-plantio quando comparado ao controle e aos demais tratamentos herbicidas avaliados.

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Environmental and physiological factors that affect the efficacy of herbicides that inhibit the enzyme protoporphyrinogen oxidase: a literature review

Cited by 36 publications

References 29 publications

Biochemical and Physiological Changes in Rice Plants Due to the Application of Herbicides1

Biochemical and Physiological Changes in Rice Plants Due to the Application of Herbicides1

Differences in efficacy, resistance mechanism and target protein interaction between two PPO inhibitors in Palmer amaranth (Amaranthus palmeri)

Seletividade De Herbicidas Aplicados Em Pré E Pós-Transplantio De Abóbora Japonesa

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