Glyphosate effects on diseases of plants

Johal, Gurmukh S.; Huber, D. M.

doi:10.1016/j.eja.2009.04.004

Cited by 198 publications

(171 citation statements)

References 34 publications

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“…This is due mainly to the widespread use of glyphoresistant seeds [2], which inhibits the growth of competitive weeds in combination with glyphosate [3][4] allowing crops to be very productive and efficient at low cost [5] [6]. Glyphoresistant seeds are genetically modified organisms, mainly soya, corn, canola, wheat, sugar beet, and cotton [7].…”

Section: Introductionmentioning

confidence: 99%

“…In the environment, it has a half-life between 7 and 174 days [8] [9] and metabolizes into AMPA, methylamine, ammonia, and carbon dioxide [10]. Extensive and recurrent uses, as well as an inappropriate product application, cause its presence in unwanted areas and glyphosate can be found in soil [11], water [12] [13], crops [14], plants [2], animals [15], and human inhabited areas [16], with a significant toxicological and environmental potential damage [17].…”

Section: Introductionmentioning

confidence: 99%

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Glyphosate detection with ammonium nitrate and humic acids as potential interfering substances by pulsed voltammetry technique

Gil

Laguarda-Miró

Camino

et al. 2013

Talanta

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ElsevierMartínez Gil, P.; Laguarda Miró, N.; Soto Camino, J.; Masot Peris, R. (2013) AbstractPulsed voltammetry has been used to detect and quantify glyphosate on buffered water in presence of ammonium nitrate and humic substances. Glyphosate is the most widely used herbicide active ingredient in the world. It is a non-selective broad spectrum herbicide but some of its health and environmental effects are still being discussed. Nowadays, glyphosate pollution in water is being monitored but quantification techniques are slow and expensive. Glyphosate wastes are often detected in countryside water bodies where organic substances and fertilizers (commonly based on ammonium nitrate) may also be present. glyphosate also forms complexes with humic acids so these compounds have also been taken into consideration. The objective of this research is to study the interference of these common pollutants in glyphosate measurements by pulsed voltammetry. The statistical treatment of the voltammetric data obtained lets us discriminate glyphosate from the other studied compounds and a mathematical model has been built to quantify glyphosate concentrations in a buffer despite the presence of humic substances and ammonium nitrate. In this model, the coefficient of determination (R 2 ) is 0.977 and the RMSEP value is 2.96x10 -5 so the model is considered statistically valid.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Glyphosate detection with ammonium nitrate and humic acids as potential interfering substances by pulsed voltammetry technique

Gil

Laguarda-Miró

Camino

et al. 2013

Talanta

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“…Em algumas parcelas as plantas de arroz apresentavam sintomas visuais de deficiência de Cu. Ademais, Johal & Huber (2009) constataram que o glifosato causou decréscimo na população de organismos redutores e aumento na de oxidantes de Mn na rizosfera. A maior população de organismos oxidantes favoreceu a transformação do Mn 2+ , forma ativa, absorvível pelas plantas, em Mn 4+ , forma inativa, não absorvível pelas plantas.…”

Section: Resultsunclassified

Correlação entre produtividade do arroz no sistema semeadura direta e atributos do solo

Godoy¹,

Stone

Ferreira

et al. 2015

Rev. bras. eng. agríc. ambient.

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Objetivou-se, com este trabalho, identificar um conjunto de atributos do solo correlacionados com a produtividade do arroz de terras altas visando estabelecer as condições de solo mais adequadas ao cultivo deste cereal em semeadura direta. Em Santo Antônio de Goiás, GO, em áreas cultivadas, respectivamente por um, dois e três anos com arroz em semeadura direta, foi determinada a produtividade do arroz e retiradas amostras de solo na camada de 0,00-0,10 m de um Latossolo Vermelho ácrico, para determinação de atributos físicos, químicos e biológicos. A produtividade apresentou correlação positiva com os teores de nitrogênio total, cobre, ferro, manganês, carbono e nitrogênio da biomassa microbiana (NBM), atividade enzimática total e da fosfatase ácida, quociente microbiano e relação NBM:N total e negativa com a microporosidade e quociente metabólico. Pela análise de regressão linear múltipla os atributos do solo que melhor explicaram, de maneira conjunta, a produtividade, foram os teores de cobre, ferro e nitrogênio da biomassa microbiana e a atividade da fosfatase ácida.

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“…The decreased chlorophyll content of plant cells exposed to glufosinate was partly explained by its strong inhibitory effect on synthesis of the chlorophyll precursor, 5-aminolevulinic acid [11]. When green microalgae were exposed to micromolar concentrations of the herbicide, their chlorophyll content (mainly the chlorophyll-b concentration) exhibited a significant increase, because impairment of photochemical reactions of photosynthesis on the acceptor side of photosystem II resulted in an enhancement of the light-harvesting capacity, as algae tried to compensate energy deficiency by increasing the number of light-absorbing molecules [3], [16].…”

Section: Resultsmentioning

confidence: 99%

Comparative study on growth and photosynthetic pigment dynamics of two microalgae under the influence of water pollution with the herbicide glufosinate

Plugaru¹,

Fodorpataki²,

Orban³

et al. 2017

Studia UBB Chemia

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ABSTRACT. The aim of the study is to compare biochemical and physiological reactions of two related species of green microalgae (Scenedesmus acuminatus and Scenedesmus opoliensis), both considered suitable for bioindication and remediation of aquatic environments polluted with herbicides. Monoalgal axenic cultures were treated for 10 days under controlled conditions with different concentrations (from 0.1 μM to 100 µM) of glufosinate (a nonselective contact herbicide that inhibits glutamine synthase activity, thus disturbing photorespiration, inhibiting photosynthetic carbon assimilation, and generating ammonium excess in plant cells). S. opoliensis was found to be a better indicator of adverse effects of glufosinate than S. acuminatus. Changes in the ground chlorophyll fluorescence (reflecting light energy harvesting capacity), in cell division rate and in chlorophyll-a content may be early, costeffective and sensitive markers of herbicide impact on microalgal communities inhabiting polluted water. Our results bring new data concerning the need of selection among related test organisms based on differentiated tolerance, as well as concerning biochemical parameters suitable for evaluation of water pollution impact when organic xenobiotics accumulate in aquatic environments. Thus, the presented results may be applied in optimizing bioindication of water quality using microalgae, and in treatment of wastewater polluted due to agricultural practices.

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Glyphosate effects on diseases of plants

Cited by 198 publications

References 34 publications

Glyphosate detection with ammonium nitrate and humic acids as potential interfering substances by pulsed voltammetry technique

Glyphosate detection with ammonium nitrate and humic acids as potential interfering substances by pulsed voltammetry technique

Correlação entre produtividade do arroz no sistema semeadura direta e atributos do solo

Comparative study on growth and photosynthetic pigment dynamics of two microalgae under the influence of water pollution with the herbicide glufosinate

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