Effects of Glyphosate on Metabolism of Phenolic Compounds: VI. Effects of Glyphosine and Glyphosate Metabolites on Phenylalanine Ammonia-Lyase Activity, Growth, and Protein, Chlorophyll, and Anthocyanin Levels in Soybean (<i>Glycine max</i>) Seedlings

Hoagland, Robert E.

doi:10.1017/s0043174500055545

Cited by 83 publications

(62 citation statements)

References 42 publications

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“…39,40 Although seldom looked for, some plants may also metabolize glyphosate to sarcosine and inorganic phosphate. 39 AMPA is a very weakly phytotoxic compound, 41 and glyoxylate is a natural plant metabolite. Therefore, enhanced degradation of glyphosate to AMPA should not pose problem for a weed.…”

Section: Enhanced Metabolismmentioning

confidence: 99%

Overview of glyphosate‐resistant weeds worldwide

Heap¹,

Duke

2017

Pest Management Science

374

287

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Glyphosate is the most widely used and successful herbicide discovered to date, but its utility is now threatened by the occurrence of several glyphosate-resistant weed species. Glyphosate resistance first appeared in Lolium rigidum in an apple orchard in Australia in 1996, ironically the year that the first glyphosate-resistant crop (soybean) was introduced in the USA. Thirty-eight weed species have now evolved resistance to glyphosate, distributed across 37 countries and in 34 different crops and six non-crop situations. Although glyphosate-resistant weeds have been identified in orchards, vineyards, plantations, cereals, fallow and non-crop situations, it is the glyphosate-resistant weeds in glyphosate-resistant crop systems that dominate the area infested and growing economic impact. Glyphosate-resistant weeds present the greatest threat to sustained weed control in major agronomic crops because this herbicide is used to control weeds with resistance to herbicides with other sites of action, and no new herbicide sites of action have been introduced for over 30 years. Industry has responded by developing herbicide resistance traits in major crops that allow existing herbicides to be used in a new way. However, over reliance on these traits will result in multiple-resistance in weeds. Weed control in major crops is at a precarious point, where we must maintain the utility of the herbicides we have until we can transition to new weed management technologies. © 2017 Society of Chemical Industry.

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Section: Enhanced Metabolismmentioning

confidence: 99%

Overview of glyphosate‐resistant weeds worldwide

Heap¹,

Duke

2017

Pest Management Science

374

287

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“…In susceptible soybean, chlorophyll content in hypocotyls decreased when grown in liquid culture containing 0.5 mM glyphosate (Hoagland 1980). However, in glyphosate-resistant soybean, glyphosate at 1.12 or 2.24 kg/ha had no effect on leaf chlorophyll content (Hoagland et al 1999).…”

Section: Effect Of Single and Sequential Application Of Glyphosate Onmentioning

confidence: 99%

“…But the physiological effects associated with injury caused by glyphosate application to glyphosate-resistant soybean are not fully understood. Glyphosate at 0.5 mM decreased chlorophyll content in hypocotyls of soybean grown in liquid culture (Hoagland 1980). Glyphosate applications can reduce plant growth, and concomitantly reduce nodulation, in glyphosate-resistant soybean (King and Purcell 1998).…”

Section: Introductionmentioning

confidence: 99%

Effect of Glyphosate on Growth, Chlorophyll, and Nodulation in Glyphosate-Resistant and Susceptible Soybean (Glycine max) Varieties

Reddy

Hoagland

Zablotowicz

2000

Journal of New Seeds

Self Cite

103

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Greenhouse and growth chamber experiments were conducted to examine glyphosate [isopropylamine salt of N-(phosphonomethyl) glycine] effects on growth, chlorophyll content, nodulation, and nodule leghemoglobin content of glyphosate-resistant and susceptible soybean (Glycine max [L.] Merr.) varieties. In susceptible soybean, a single application of 0.28 kg/ha reduced chlorophyll content (49%), and shoot and root dry weight (50 and 57%, respectively) at 2 wk after treatment. In glyphosate-resistant soybean, there were no significant effects on these parameters by single application up to 1.12 kg/ha, but 2.24 kg/ha reduced shoot and root dry weight by 25 to 30%. Application of glyphosate 1.12 kg/ha, followed by sequential applications at 0.56 or 1.12 kg/ha, did not affect plant growth and chlorophyll content, but application of 2.24 kg/ha followed by sequential application of 2.24 kg/ha reduced root growth. In glyphosate-resistant soybean, an application of 1.12 kg/ha 3 wk after planting did not affect nodule number or Krishna N. Reddy is Plant Physiologist, Robert E. Hoagland is Research Chemist, and Robert M. Zablotowicz is Soil Microbiologist, Southern

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“…seedlings (Duke et al, 1979;Hoagland, 1980). Glyphosate has been reported to negatively impact hydroxyphenolic compound and anthocyanin levels in soybean [Glycine max (L.) Merr.]…”

Section: Canned Bean Quality and Colormentioning

confidence: 99%

Preharvest Herbicide Treatments Affect Black Bean Desiccation, Yield, and Canned Bean Color

et al. 2016

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To facilitate direct harvest, preharvest herbicide applications are used to desiccate weeds and to accelerate and promote uniform dry bean (Phaseolus vulgaris L.) maturation. Field trials were conducted near Richville, MI, in 2013 and 2014 to evaluate the effects of preharvest herbicide treatments on desiccation, yield, and canned black bean quality and color. Three black bean cultivars, Zorro, Eclipse, and Zenith, were planted on two different dates in each of 2 yr. Three preharvest herbicide treatments, paraquat, glyphosate, and saflufenacil, were applied at a standard (pods = 80% yellow) and an early (pods = 50% yellow) application timing. A nontreated control was established for each cultivar. Differences in black bean desiccation were greatest 3 d after treatment (DAT), with paraquat and saflufenacil showing the quickest desiccation at the early application timing. By 7 DAT, desiccation for most preharvest treatments was >95%. Saflufenacil applied at the early timing reduced yield by as much as 55% compared with the nontreated control. Yield was generally not affected when preharvest herbicide treatments were applied at the standard application timing. Black bean cultivar influenced canned bean color retention (Zenith > Zorro > Eclipse). Preharvest herbicide treatments reduced color retention when applied at the early application timing; glyphosate reduced color retention by as much as 24%. Because of variability in bean maturation rate within a field, preharvest herbicide treatments need to be applied as close to physiological maturity as possible to minimize yield losses and maintain color retention of canned black bean.

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Effects of Glyphosate on Metabolism of Phenolic Compounds: VI. Effects of Glyphosine and Glyphosate Metabolites on Phenylalanine Ammonia-Lyase Activity, Growth, and Protein, Chlorophyll, and Anthocyanin Levels in Soybean (Glycine max) Seedlings

Cited by 83 publications

References 42 publications

Overview of glyphosate‐resistant weeds worldwide

Overview of glyphosate‐resistant weeds worldwide

Effect of Glyphosate on Growth, Chlorophyll, and Nodulation in Glyphosate-Resistant and Susceptible Soybean (Glycine max) Varieties

Preharvest Herbicide Treatments Affect Black Bean Desiccation, Yield, and Canned Bean Color

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