Glyphosate Effect on Shikimate, Nitrate Reductase Activity, Yield, and Seed Composition in Corn

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

doi:10.1021/jf904121y

Cited by 41 publications

(44 citation statements)

References 30 publications

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“…Corn kernels from each pot were analyzed for protein, oil, starch and fiber percentage using a near infrared (NIR) reflectance diode array feed analyzer (Petren, Springfield, IL) [20] [21]. Calibration equations were developed by Perten using Thermo Galactic Grams PLS IQ.…”

Section: Seed Composition Analysismentioning

confidence: 99%

Corn Yield Response to Reduced Water Use at Different Growth Stages

Kebede¹,

Sui²,

Fisher³

et al. 2014

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To develop an efficient water use strategy for crop irrigation, we need to know how much water can be reduced without decreasing yield. A study was designed to determine corn growth stages at which water could be reduced without affecting grain yield, and at what soil moisture level water deficit stress begins in the plants in a silt loam soil. An experiment was conducted in a randomized complete block with a 3 × 4 factorial design in four replications, where treatments consisted of three soil moisture levels [100%, 75%, and 50% of field capacity (FC) of a silt loam soil by weight] and four growth stages [fourteen leaf stage (V14), silking (R1), milk (R3), and dent (R5) stages] in a greenhouse. Growth stages at the reproductive and grain fill stages of corn were selected because this study was intended for the Mississippi Delta, where there is frequent drought during these growth stages making irrigation necessary for corn production, whereas there is usually adequate rainfall during the vegetative growth stages. Results from this study showed that reducing soil moisture from 100% FC (fully irrigated) to 75% FC of a silt loam soil starting at the R1 growth stage in corn did not reduce yield significantly compared to yield from the 100% FC, while saving a significant amount of water. Physiological investigations at the three soil moisture treatments showed that a mild moisture deficit stress might have started at the 75% FC treatment. With further investigation, if savings in water at 75% FC result in a significant reduction in energy cost, it may be profitable to reduce soil moisture to 75% FC in a silt loam soil.

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Section: Seed Composition Analysismentioning

confidence: 99%

Corn Yield Response to Reduced Water Use at Different Growth Stages

Kebede¹,

Sui²,

Fisher³

et al. 2014

Self Cite

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“…Nitrate stimulates nitrate reductase activity, whereas ammonium and nitrogen compounds accumulated in plants' tissues may repress nitrate assimilation. Reddy et al (2010) examined the influence of glyphosate simulated drift effect on non-glyphosate-resistant corn. They indicated that glyphosate drift significantly reduced both leaf nitrogen and nitrate reductase activity.…”

Section: Discussionmentioning

confidence: 99%

Laboratory Study to Investigate the Response of Cucumis sativus L. to Roundup and Basta Applied to the Rooting Medium

Sacała¹,

Demczuk²,

Grzys³

2011

Herbicides - Mechanisms and Mode of Action

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“…ha -1 (Vieira Jr. et al, 2015) and when evaluating production components, nitrogen content, protein and oil in the grains, and shikimate levels in the plant, at doses up to 1296 g a.i. ha -1 (Reddy et al, 2010). Some studies reported that glyphosate can cause problems for development for RR2 corn.…”

Section: Experiments Performed In Palotina -Pr (2015)mentioning

confidence: 99%

Assessment of Roundup Ready 2 (RR2) corn subjected to application of isolated and associated herbicides

Albrecht¹,

Albrecht²,

Krenchinski³

et al. 2017

Aust J Crop Sci

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One of the first transgenic traits that has been inserted into commercial crops and being widely used is tolerance to glyphosate herbicide. This technology has provided significant benefits and conveniences to farmers due to the efficacy of glyphosate. However, for a better weed control and prevention of weed resistant biotypes the use of two or more mechanisms is recommended practice. The combination of herbicides is the subject of several studies especially evaluating weed control, aside which the selectivity of the culture is equally important. In this context, this study aimed to evaluate the responses of transgenic corn (RR2) subjected to the application of different herbicides. For this purpose, an experiment was conducted with eight treatments using glyphosate, atrazine and nicosulfuron, sole or in combination along with a control treatment (without herbicide). The experiment was performed twice (first in Piracicaba -SP then Palotina -PR) in greenhouse with different corn hybrids. Several variables related to the performance were analysed such as height measurements, stem diameter, chlorophyll index, fresh and dry shoot, root dry mass. The results showed that nicosulfuron should be positioned cautiously in new RR2 corn hybrids, as it may damage the development of the plant.

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Glyphosate Effect on Shikimate, Nitrate Reductase Activity, Yield, and Seed Composition in Corn

Cited by 41 publications

References 30 publications

Corn Yield Response to Reduced Water Use at Different Growth Stages

Corn Yield Response to Reduced Water Use at Different Growth Stages

Laboratory Study to Investigate the Response of Cucumis sativus L. to Roundup and Basta Applied to the Rooting Medium

Assessment of Roundup Ready 2 (RR2) corn subjected to application of isolated and associated herbicides

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