Glufosinate Effects on Nitrogen Nutrition, Growth, Yield, and Seed Composition in Glufosinate-Resistant and Glufosinate-Sensitive Soybean

Reddy, Krishna N.; Zablotowicz, Robert M.; Bellaloui, Nacer; Ding, Wei

doi:10.1155/2011/109280

Cited by 12 publications

(8 citation statements)

References 28 publications

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“…PPT caused a decrease in chlorophyll content in non-transgenic soybean plants three days after treatment [49]. In non-transgenic birch saplings, three days after treatment with the 0.5% PPT solution, the chlorophyll A and carotenoids content significantly decreased, after the 1% solution the total of chlorophyll A and B also decreased, and after treatment with the 2% solution the same happened to chlorophyll B.…”

Section: Discussionmentioning

confidence: 88%

Effect of Phosphinothricin on Transgenic Downy Birch (Betula pubescens Ehrh.) Containing bar or GS1 Genes

Lebedev

Krutovsky

Shestibratov

2019

Forests

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Weeds are a big problem in agriculture and forestry, and herbicides are the main tools to control them. Phosphinotricin (ammonium glufosinate, PPT) is one of the most effective non-selective herbicides, to which weeds hardly gain resistance, but the reasons for its effect and toxicity to plants are still unclear, and especially, it is little studied in trees, including transgenic ones. We studied the physiological responses of downy birch (Betula pubescens Ehrh.) containing the herbicide resistance bar gene or the cytosol glutamine synthetase GS1 gene (the target enzyme of the herbicide) to PPT-based Basta herbicide treatment in various doses under open-air conditions during two years. Birch saplings with the bar gene were resistant to a double field dose (10 L/ha), but the expression of the GS1 gene only slightly increased resistance compared to the control. Herbicide treatment increased the ammonium level in leaf tissue by 3–8 times, but this, apparently, was not the main cause of plant death. Among leaf pigments, chlorophyll B was the most resistant to PPT, and carotenoids were the most sensitive. Responses of birch trees with the GS1 gene (accumulation of ammonium, pigment content, and dehydration) during treatment with a low dose of herbicide were less pronounced than in control plants. One-year-old control and transgenic plants with the GS gene died after 2.5 L/ha treatment, and two-year-old plants lost foliage after such treatment but remained alive and developed buds four weeks after treatment. Herbicide treatment of plants with the bar gene did not cause significant deviations in height (first year) or the accumulation of aboveground biomass (second year). The obtained results improve our understanding of the effect of PPT on woody plants and can be used both to clarify mechanisms of herbicide action and in plantation forestry.

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Section: Discussionmentioning

confidence: 88%

Effect of Phosphinothricin on Transgenic Downy Birch (Betula pubescens Ehrh.) Containing bar or GS1 Genes

Lebedev

Krutovsky

Shestibratov

2019

Forests

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“…On the other hand, other studies do not even report injury symptoms for the application of glufosinate (Barnes et al 2017;Chahal and Jhala 2015;Jhala et al 2017;Landry et al 2016). Reddy et al (2011) observed changes in the composition of LL soybean seeds under two applications of glufosinate (450 and 450 g ha −1 at the V3 and V6 stages, respectively). Glufosinate increased the protein concentration and decreased the oil concentration compared with the treatment without application.…”

Section: Glufosinate Rates In Two Ll Soybean Cultivars (With the Pat mentioning

confidence: 85%

Metabolic changes, agronomic performance, and quality of seeds in soybean with the pat gene after application of glufosinate

et al. 2020

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The transgenic Liberty Link® (LL) soybean is tolerant to glufosinate, conferred by the enzyme phosphinothricin acetyltransferase (PAT), which is encoded by the pat gene from Streptomyces viridochromogenes. Since in some situations symptoms of injury can be observed in soybean [Glycine max (L.) Merr.] plants, this study evaluated the effects of rates of glufosinate on agronomic performance, quality of LL soybean seeds and the ammonia, glufosinate and N-acetyl-L-glufosinate concentration (NAG) in soybeans with and without the pat gene after application of glufosinate rates. Field and greenhouse experiments were conducted; the first evaluated the selectivity of glufosinate in LL soybeans, and the second, the metabolic changes in soybeans with (LL) and without (RR2) the pat gene, after application of glufosinate. For field work, application of glufosinate, in rates up to four times the maximum recommended, caused initial injury symptoms (up to 38.5%) in LL soybean plants. However, no negative effect was found on seed quality and agronomic performance of LL plants, including yield. This shows the selectivity of glufosinate promoted by pat gene insertion, for application in POST (V4), in LL soybean. For the greenhouse experiment, it was concluded that the LL soybean plants presented high glufosinate metabolism, lower ammonia concentration, and no reduction in dry matter, in comparison with RR2 soybean, after application of high rates of glufosinate.

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“…In glufosinate-tolerant rice, the strength and germination of the seeds submitted to the glufosinate application did not decrease (Webster et al, 2003). Moreover, in glufosinate-tolerant soybean, applications of the herbicide increased the protein content and diminished the oil and linoleic acid content of the seeds (Reddy et al, 2011).…”

Section: Resultsmentioning

confidence: 87%

Post-emergent applications of isolated and combined herbicides on corn culture with cp4-epsps and pat genes

et al. 2018

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Nomenclature: glufosinate-ammonium atrazine glyphosate corn Zea mays LKeywords: Association herbicides Liberty link Roundup ready A B S T R A C TFor optimum yield, it is necessary to incorporate a good weed control into the system. This study aimed to determine the effects of a post-emergent application of different herbicides (individually and combined) on corn presenting cp4-epsps and pat genes. Field studies were conducted on the corn hybrid 2B810 with the cp4-epsps and pat genes in the agricultural years 2012/13 and 2013/14 and included 8 treatments with isolated and combined application of glyphosate, glufosinate-ammonium, and atrazine. The variables evaluated were chlorophyll type a and b, total chlorophyll index, stem diameter, height of the cob insertion, prolificacy index, first height, second height, yield, and volume of 100 grains. The combination of all three herbicides hindered the yield of corn cultures. This practice therefore requires caution when applied to weed management. The combination of two herbicides did not affect the final height or yield and may be a useful method of weed management in future.

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Glufosinate Effects on Nitrogen Nutrition, Growth, Yield, and Seed Composition in Glufosinate-Resistant and Glufosinate-Sensitive Soybean

Cited by 12 publications

References 28 publications

Effect of Phosphinothricin on Transgenic Downy Birch (Betula pubescens Ehrh.) Containing bar or GS1 Genes

Effect of Phosphinothricin on Transgenic Downy Birch (Betula pubescens Ehrh.) Containing bar or GS1 Genes

Metabolic changes, agronomic performance, and quality of seeds in soybean with the pat gene after application of glufosinate

Post-emergent applications of isolated and combined herbicides on corn culture with cp4-epsps and pat genes

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