Growth, morphological, metabolic and photosynthetic responses of clones of eucalyptus to glyphosate

Cerveira, Wilson Roberto; Costa, Yanna Karoline Santos da; Carbonari, Caio Antônio; Duke, Stephen O.; Alves, Pedro Luís da Costa Aguiar; Carvalho, Leonardo Bianco de

doi:10.1016/j.foreco.2020.118218

Cited by 14 publications

(8 citation statements)

References 43 publications

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“…50 Low doses of glyphosate alter biochemical reactions. The efficiency of A increases, 12,19 generated by the concentration of C i that reaches the chloroplast stroma. This results in higher CE by ribulose-1,5-bisphosphate carboxylase-oxygenase (RuBisCo), maintaining levels of A, and consequently greater efficiency in WUE rates due to a reduction in E.…”

Section: Discussionmentioning

confidence: 98%

“…[4][5][6] The stimulatory effect of treatment with low doses of chemicals on the growth of various plant species has been the focus of several studies. [5][6][7][8][9][10][11][12][13][14] In this context, the term hormesis refers to an adaptive/protective response caused by chemical stressors when used in low doses in plants. 15 The most widely used herbicide in the world, glyphosate, causes hormesis, 1,3,9,16,17 and studies are ongoing to elucidate the ability of low doses of glyphosate to stimulate plant growth 13 and improve agricultural sustainability by reducing environmental impacts.…”

Section: Introductionmentioning

confidence: 99%

“…The stimulatory effect of treatment with low doses of chemicals on the growth of various plant species has been the focus of several studies 5‐14 . In this context, the term hormesis refers to an adaptive/protective response caused by chemical stressors when used in low doses in plants 15 .…”

Section: Introductionmentioning

confidence: 99%

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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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Section: Discussionmentioning

confidence: 98%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

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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“…EPSPS is present in microorganisms and all plants but not in animals and is the sole target of glyphosate in plants. 13 , 14 Conventional eucalyptus is highly sensitive to glyphosate, 15 , 16 such that during application, herbicide drift between planted rows can cause 15–100% damage to young plantlets, significantly reducing yield and harvesting efficiency. 3…”

Section: Introductionmentioning

confidence: 99%

Safety Assessment of the CP4 EPSPS and NPTII Proteins in Eucalyptus

Avisar,

Azulay,

Bombonato

et al. 2023

GM Crops & Food

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Glyphosate herbicide treatment is essential to sustainable Eucalyptus plantation management in Brazil. Eucalyptus is highly sensitive to glyphosate, and Suzano/FuturaGene has genetically modified eucalyptus to tolerate glyphosate, with the aim of both protecting eucalyptus trees from glyphosate application damage and improving weed management. This study presents the biosafety results of the glyphosate-tolerant eucalyptus event 751K032, which expresses the selection marker neomycin phosphotransferase II (NPTII) enzyme and CP4-EPSPS, a glyphosate-tolerant variant of plant 5-enolpyruvyl-shikimate−3-phosphate synthase enzyme. The transgenic genetically modified (GM) event 751K032 behaved in the plantations like conventional non-transgenic eucalyptus clone, FGN-K, and had no effects on arthropods and soil microorganisms. The engineered NPTII and CP4 EPSPS proteins were heat-labile, readily digestible, and according to the bioinformatics analyses, unlikely to cause an allergenic or toxic reaction in humans or animals. This assessment of the biosafety of the glyphosate-tolerant eucalyptus event 751K032 concludes that it is safe to be used for wood production.

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“…Eucalyptus is the most planted forest species in Brazil, [6]. Within this genus, Eucalyptus urophylla and its hybrids are the most frequently used in commercial plantations and are obtained via vegetative propagation in clonal mini-gardens that produce commercially named clones [7,8].…”

Section: Introductionmentioning

confidence: 99%

Clonal propagation of Eucalyptus urophylla under effect of Cyperus rotundus extract and indole-3-acetic acid

et al. 2021

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Cyperus rotondus tubers possess substances with allelopathic qualities. Some of these substances can act as synergists of plant hormones and be used for root induction in cuttings. This study aimed to shed light on the development and rooting of Eucalyptus urophylla cuttings treated with C. rotondus (nutgrass) tuber extract and IAA (indole-3-acetic acid). The experiments were conducted using a completely randomized design (0; 25; 50; 75 and 100% nutgrass extract and 0; 50; 250; 500; 750 and 1000 mg L-1 of IAA), with four repetitions per treatment and four cuttings per plot. Plantlet height, stem width and root length were measured. The greatest width and height values were recorded for the control (0% nutgrass extract and 0 mg L-1 of IAA), indicating that these substances did not contribute to the development of these variables. However, treatments of nutgrass extract up to 50% were associated with greater root length. C. rotundus extract concentrations of 53% can be used to improve root development in E. urophylla cuttings, and contribute to the production of higher quality plantlets.

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Growth, morphological, metabolic and photosynthetic responses of clones of eucalyptus to glyphosate

Cited by 14 publications

References 43 publications

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

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

Safety Assessment of the CP4 EPSPS and NPTII Proteins in Eucalyptus

Clonal propagation of Eucalyptus urophylla under effect of Cyperus rotundus extract and indole-3-acetic acid

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