Baixas doses de glyphosate e seus efeitos no crescimento de

Meschede, Dana Kátia; Velini, Edivaldo Domingues; Carbonari, Caio Antônio

doi:10.7824/rbh.v7i2.61

Cited by 10 publications

(11 citation statements)

References 4 publications

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“…Leaves dry mass production of common bean Xodo genotype increased linearly with the rise of glyphosate reduced doses ( Figure 1A), reaching the maximum value around 34.14% of increase in leaves dry mass acumulation for the glyphosate subdose of 12.96 g ha -1 . Similar result was found by Mechede et al (2008) when authors observed growth stimulus in leaves of Commelina benghalensis, with greater length and leaf area for all reduced doses used.…”

Section: Resultssupporting

confidence: 87%

Crescimento e absorção de fósforo do feijoeiro comum ‘Xodó’ sob efeito de subdoses de glyphosate

Rabello

Monnerat²,

Campanharo³

et al. 2012

RBHerbicidas

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It was evaluated the effect of glyphosate reduced rates on growth and phosphorus (P) uptake of 'Xodó' common bean (Phaseolus vulgaris L.) genotype. The experiment was conducted in factorial scheme 4 x 2, in randomized blocks design with four replications, with the first factor constituted by reduced doses of 0, 4.32, 8.64 and 12.96 g ha-1 equivalent acid (e.a.) of glyphosate and the second factor consisted of soil P rates (50 and 250 mg dm-3). Evaluations were conducted 30 days after glyphosate application (DAA). The reduced dose of 12.96 g ha-1 stimulated common bean cv. Xodó growth as well as increased P concentration in stem and P content in shoot dry mass plants.

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Section: Resultssupporting

confidence: 87%

Crescimento e absorção de fósforo do feijoeiro comum ‘Xodó’ sob efeito de subdoses de glyphosate

Rabello

Monnerat²,

Campanharo³

et al. 2012

RBHerbicidas

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“…These stimulatory effects have been observed in several species, such as Stellaria media (common chickweed), Tripleurospermum inodorum (scentless mayweed), Commelina benghalensis (tropical spiderwort), Hordeum vulgare (barley), Zea mays (maize), Glycine max (soybean), Eucalyptus grandis (eucalyptus), Pinus caribea (pine), Saccharum spp. (sugarcane), Coffea arabica L. (coffee), and Lactuca sativa (lettuce) …”

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confidence: 99%

Hormetic effect of glyphosate persists during the entire growth period and increases sugarcane yield

Pincelli-Souza

Bortolheiro

Carbonari

et al. 2020

Pest Management Science

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BACKGROUND: Stimulation of plant growth by low doses of a toxic compound is defined as a hormetic effect. Exposure of plants to low doses of glyphosate can cause stimulatory effects on growth or other variables. Sugarcane is the major biofuel and sugarproduction crop cultivated in Brazil, but its expansion to new areas is limited; therefore, there is a demand for new technologies to improve sugarcane production per unit area. The use of pesticides to stimulate growth through the hormetic effect might be a suitable strategy to increase sugarcane yields. The purpose of this research was to investigate the effect of a low dose of glyphosate on metabolic compound accumulation, leaf phosphorus (P) concentration, and morphological variables across a one-year sugarcane cycle, as well as to determine whether the glyphosate effect was sustained and effective in improving the yield and technological quality of the sugarcane at harvest. RESULTS:The application of a low dose of glyphosate led to higher concentrations of shikimic acid and quinic acid, higher leaf P concentrations, and improved plant growth, yield, and technological quality of the sugarcane, by increasing the Brix% juice, pol% cane, total recoverable sugar, tons of culms per hectare, and tons of pol per hectare, relative to the results for an untreated control.CONCLUSIONS: The increased growth stimuli, observed through several variables, promoted an improvement in sugarcane yield. Therefore, the application of a low dose of glyphosate to sugarcane is a promising practice for crop management.

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“…Estudos realizados com a aplicação de subdoses de glifosato em espécies como milho, soja, eucalipto, aveia, e em diferentes condições, apontaram, respectivamente, diversas reações, como estímulo de crescimento (Meschede et al, 2008;Velini et al, 2008;Silva et al, 2009;Gitti et al, 2011;Silva et al, 2012), aumento na área foliar, na altura das plantas e na produção vegetal , incremento na massa seca de plantas, no teor de tirosina e caroteno, e aumento na absorção de fósforo (Godoy, 2007;Meschede et al, 2011).…”

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Subdoses De Glyphosate No Processo Germinativo E Desenvolvimento De Plântulas De Milho

Barbosa

Zucareli

Freiria

et al. 2017

RBMS

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RESUMO -O presente trabalho objetivou avaliar o efeito de subdoses de glifosato sobre o processo germinativo e o desenvolvimento de plântulas de cultivares convencionais de milho em condições de laboratório. O delineamento experimental utilizado foi o inteiramente casualizado, em esquema fatorial 2 x 6, com quatro repetições. Os tratamentos consistiram da interação de dois genótipos convencionais de milho (Sintético UEL e AG 9010 PRO) submetidos a seis subdoses de glifosato (0; 3,5; 7,0; 10,5; 14,0 e 17,5 g e.a. ha -1 ). As avaliações consistiram da germinação de sementes (plântulas normais, anormais e sementes mortas), comprimento e massa seca de plântulas (parte aérea, raiz e total). O desempenho germinativo e o crescimento inicial das plântulas de milho são alterados pelas subdoses de glifosato. Existe efeito de hormese para germinação e massa seca de parte aérea nas subdoses de 0,084 e 7 g e.a. ha -1 respectivamente para o genótipo AG9010 e para massa seca da parte aérea na subdose de 8,16 g e.a. ha -1 para o genótipo Sintético UEL.O incremento das subdoses de glifosato favorece a anormalidade de plântulas e a mortalidade de sementes, além de diminuir o comprimento e a massa seca das radículas e de plântulas.Palavras-chave: hormese, germinação, Zea mays. LOW RATES OF GLYPHOSATE ON THE PROCESS GERMINATION AND CORN SEEDLING DEVELOPMENTABSTRACT -This work aimed to evaluate, in the laboratory, the effect of low rates of glyphosate on the germination and seedling development of conventional corn cultivars. The experimental design was completely randomized in a factorial 2 x 6, with four replications. The treatments consisted of the interaction of two conventional corn genotypes (Synthetic UEL and AG 9010 PRO) submitted to six low rates of glyphosate (0, 3.5, 7.0, 10.5, 14.0 and 17.5 g a.e. ha -1 ).Evaluations consisted of seed germination (normal seedlings, abnormal and dead seeds), seedling length (shoot, root and total) and seedling dry weight (shoot, root and total). Low rates of glyphosate change germination performance and early growth of corn seedlings . There hormesis effect for the germination and dry mass of shoots in rates of 0.084 and 7 g e.a. ha -1 respectively for the AG9010 genotype and dry weight of shoot in doses of 8.16 g e.a. ha -1 for Synthetic UEL genotype. The increase of the low rates of glyphosate promotes abnormal seedlings and seed mortality, and reduce the length and dry mass of radicles and seedlings.

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Baixas doses de glyphosate e seus efeitos no crescimento de

Cited by 10 publications

References 4 publications

Crescimento e absorção de fósforo do feijoeiro comum ‘Xodó’ sob efeito de subdoses de glyphosate

Crescimento e absorção de fósforo do feijoeiro comum ‘Xodó’ sob efeito de subdoses de glyphosate

Hormetic effect of glyphosate persists during the entire growth period and increases sugarcane yield

Subdoses De Glyphosate No Processo Germinativo E Desenvolvimento De Plântulas De Milho

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