Pouteria torta is a remarkable native plant for biomonitoring the glyphosate effects on Cerrado vegetation

Rezende-Silva, Sueisla Lopes; Costa, Alan Carlos; Dyszy, Fábio Henrique; Batista, Priscila Ferreira; Filho, Ailton José Crispim; Nascimento, Kelly Juliane Telles; Silva, Adinan Alves da

doi:10.1016/j.ecolind.2019.03.003

Cited by 23 publications

(8 citation statements)

References 61 publications

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“…En relación a la aplicación de herbicidas, en áreas donde se realiza control químico para el manejo de malezas es muy común el daño a organismos fuera del objetivo de la aplicación (Strandberg et al, 2017). Los efectos negativos de la deriva de herbicidas en especies arbóreas, como malformaciones foliares, alteraciones en la fisiología, disminución del crecimiento y muerte de la planta, han sido reportados en varios estudios (Santos et al, 2007;Ferreira et al, 2017;Rezende-Silva et al, 2019;Meloni et al, 2019) y el incremento en el uso de agroquímicos es uno de los principales factores de degradación en el contexto agrícola-ganadero (Barral et al, 2015). En este sentido, consideramos necesario evaluar el desempeño de más especies leñosas nativas con fines de restauración del Espinal, abarcando un numero mayor de sitios y de tiempo de monitoreo.…”

Section: Discussionunclassified

Reforestar en áreas agrícola-ganaderas: un estudio de caso evaluando el desempeño de dos especies nativas del Espinal

Cappri

Torres

Estrabou

2020

Bol. Soc. Argent. Bot.

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Introducción y objetivos: La restauración de bosques es un tema de interés creciente, especialmente en zonas agrícola-ganaderas donde los parches remanentes de bosque nativo son escasos. Evaluamos el desempeño de plantines de dos especies arbóreas nativas del Espinal. Nos propusimos (1) comparar la supervivencia y el crecimiento de plantines de Prosopis alba (algarrobo blanco) y Celtis ehrenbergiana (tala) plantados en un sitio al borde del bosque y en un sitio abierto, (2) comparar la incidencia de herbívoros entre especies y sitios, (3) describir otros factores ambientales que pudieran afectar el desempeño de los plantines en el contexto agrícola-ganadero. M&M: Plantamos 200 plantines por especie, distribuidos en los dos sitios y evaluamos mensualmente la supervivencia, altura e incidencia de herbívoros. Resultados: A los 11 meses, la supervivencia de algarrobo y tala fue de 32% y 17%, respectivamente (P<0,0001). El algarrobo tuvo mayor supervivencia en el borde del bosque mientras el tala tuvo mayor supervivencia en el sitio abierto (interacción sitio x especie, P<0,0001). La altura final fue menor que al momento de la plantación, sin diferencias entre especies ni sitios (P>0,05). Los herbívoros vertebrados afectaron al 28% de los plantines de ambas especies, mientras que los invertebrados afectaron en promedio un 5% de los plantines. Durante el experimento la plantación fue afectada por la deriva de herbicidas. Conclusiones: Recomendamos la plantación de algarrobo para extender parches de bosque remanentes y de tala para la creación de nuevos parches en sitios abiertos o incrementar conexión entre parches aislados, con exclusión ganadera y en sitios que estén protegidos de la deriva de herbicidas.

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Section: Discussionunclassified

Reforestar en áreas agrícola-ganaderas: un estudio de caso evaluando el desempeño de dos especies nativas del Espinal

Cappri

Torres

Estrabou

2020

Bol. Soc. Argent. Bot.

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“…19 Once absorbed, glyphosate is translocated to organs of higher metabolic activity, 19 following the flow of photoassimilates. 20,21 When applied during the initial stage of plant development, low doses of glyphosate lead to an increase in biomass, photosynthetic activity, protein content and amino acids and consequently, greater resistance to pests. 6,9,11,22 The stimulus dose varies for each species according to the plant's sensitivity to glyphosate, requiring individual studies to determine the dose.…”

Section: Introductionmentioning

confidence: 99%

“…Although poorly understood, it is believed that the primary cause of the hormetic effect is associated with the site of action of glyphosate 19 . Once absorbed, glyphosate is translocated to organs of higher metabolic activity, 19 following the flow of photoassimilates 20,21 . When applied during the initial stage of plant development, low doses of glyphosate lead to an increase in biomass, photosynthetic activity, protein content and amino acids and consequently, greater resistance to pests 6,9,11,22 …”

Section: Introductionmentioning

confidence: 99%

Glyphosate hormesis mitigates the effect of water deficit in safflower (Carthamus tinctorius L.)

Santos

Silva

Amorim

et al. 2021

Pest Management Science

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BACKGROUND The current climate change scenario may affect water availability in the soil, impacting the agricultural sector. Planting of safflower (Carthamus tinctorius L.) has increased because of its potential for cultivation under drought conditions during the off‐season in Brazil and its high potential for use in biofuel production. There are several reports about the potential of low doses of glyphosate to promote plant growth and development (hormesis). Despite the concept of glyphosate hormesis being well established, little is known about any mitigating effect on plants under water deficit conditions. The hypothesis raised is that low doses of glyphosate promote water stress tolerance during the growth and reproductive phases of C. tinctorius exposed to different water regimes. RESULTS In regimes with and without water deficiency, growth of plants treated with low doses of glyphosate increased, reaching a maximum stimulus amplitude of ~ 131% of control. However, plants under water deficit required lower doses to achieve maximum growth and development. They maintained photosynthetic rates at the level of well‐watered plants because they had reduced stomatal conductance and transpiration. Gains in plant height and leaf area were the same as for controls. CONCLUSIONS Low doses of glyphosate can act as mitigators of water deficit in C. tinctorius, allowing plants to maintain their metabolism, reaching levels close to those of plants without water stress, as observed for plant height and leaf area. Our findings indicate that there are even greater implications for understanding glyphosate hormesis in plants under drought conditions, given the current climate change scenario. © 2020 Society of Chemical Industry

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“…Nevertheless, the effects of the large number of commercially available pesticides on native plants still remain practically unknown. Effects of underdoses of herbicides such as diuron (Lima et al., 2017), glyphosate (Batista et al., 2018; Rezende‐Silva et al., 2019) and nicosulfuron (Silva et al., 2020) were observed in native Cerrado plants. Therefore, evaluation of the impact of atrazine on nontarget plants is important for both the subsequent cultivation (Sun et al., 2020) and for the biomonitoring and restoration of areas underlying the crops.…”

Section: Introductionmentioning

confidence: 99%

Atrazine toxicity to Handroanthus heptaphyllus, a nontarget species from a Brazilian biome threatened by agriculture

Silva

Costa

Megguer

et al. 2021

Environmental Quality Mgmt

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The economic basis of the Brazilian midwest is agriculture, concentrating most of the grain production in the country. With the purpose of increasing yield, farmers have intensified land use and the use of atrazine among other pesticides, which can supposedly compromise human health and photosynthetic metabolism of plant species from Cerrado, such as Handroanthus heptaphyllus. The aim of this study was to determine experimentally the sensitivity level of H. heptaphyllus to atrazine, by measuring gas exchange, chlorophyll a fluorescence, chloroplastidic pigments, and membrane permeability. The experiment was conducted in a factorial scheme. Nine‐month‐old H. heptaphyllus plants were treated with six realistic doses of atrazine: 0, 25, 50, 100, 200, and 400 g a.i. ha–1 (corresponding to 10, 20, 40, 80, and 100% of the commercial dose recommended for corn crops, respectively), with five replications. Evaluations were performed at 12, 36, 84, 180, and 276 h after treatment application. Photosynthesis, the effective quantum yield of photosystem II, and electron transport rate were gradually reduced by the action of atrazine. On the other hand, the nonphotochemical quenching increased gradually, which indicates that this mechanism was not sufficient to avoid oxidative stress and cellular damage in H. heptaphyllus treated plants. Based on these results, we concluded that the action of the herbicide in the photosynthetic reduction occurs by the electron transport rate limitation. Therefore, H. heptaphyllus trees are at risk in Cerrado areas next to agricultural lands.

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Pouteria torta is a remarkable native plant for biomonitoring the glyphosate effects on Cerrado vegetation

Cited by 23 publications

References 61 publications

Reforestar en áreas agrícola-ganaderas: un estudio de caso evaluando el desempeño de dos especies nativas del Espinal

Reforestar en áreas agrícola-ganaderas: un estudio de caso evaluando el desempeño de dos especies nativas del Espinal

Glyphosate hormesis mitigates the effect of water deficit in safflower (Carthamus tinctorius L.)

Atrazine toxicity to Handroanthus heptaphyllus, a nontarget species from a Brazilian biome threatened by agriculture

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