Glyphosate effects on gas exchange and chlorophyll fluorescence responses of two Lolium perenne L. biotypes with differential herbicide sensitivity

Yanniccari, Marcos; Tambussi, Eduardo Alberto; Istilart, Carolina María; Castro, Ana María

doi:10.1016/j.plaphy.2012.05.027

Cited by 56 publications

(34 citation statements)

References 31 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…Several studies report that glyphosate harms the FSII (Yanniccari et al 2012). The same was observed in quantum yield data of PSII (ΔF/F m ') and the apparent ETR, indicating that there was a reduction in the amount of energy used by the plant to perform photochemical processes such CO 2 fixation and reduction of NADPH.…”

Section: Resultsmentioning

confidence: 58%

Physiological changes and in the carbohydrate content of sunflower plants submitted to sub-doses of glyphosate and trinexapac-ethyl

et al. 2017

View full text Add to dashboard Cite

12.50; 25, and 75 g a.i.•ha −1 . The growth regulator trinexapac-ethyl did not change the photosynthetic metabolism of plants. However, glyphosate caused damage to the photosynthetic apparatus and a reduction in the carbohydrate concentration and chloroplastid pigments, with casual damage to cell membranes; these effect were more intense at increased doses. The effects of glyphosate were evidenced by the increased concentration of shikimic acid, derived from its mechanism of action. Concludes that, the photosynthetic metabolism of sunflower plants is not affected by the growth regulator trinexapac-ethyl, unlike to the evident effects after application of glyphosate.

show abstract

Section: Resultsmentioning

confidence: 58%

Physiological changes and in the carbohydrate content of sunflower plants submitted to sub-doses of glyphosate and trinexapac-ethyl

et al. 2017

View full text Add to dashboard Cite

show abstract

“…Their effects on the fluorescence kinetics will only be apparent after a much longer exposure time than in the case of PSII-type inhibitor herbicides (Popovic et al 2003). Olesen and Cedergreen (2010) and Yanniccari et al (2012) have argued that the inhibition of CO 2 assimilation is a better and more direct probe for glyphosate effects than Chl a fluorescence. This is true for OJIP transients, but it can be pointed out that a full Kautsky curve measured till the steady state is reached would also give information on the inhibition of CO 2 assimilation.…”

Section: Question 28: Can Toxicity Induced By Different Herbicides Bementioning

confidence: 99%

Frequently asked questions about chlorophyll fluorescence, the sequel

Schansker²,

et al. 2016

Self Cite

View full text Add to dashboard Cite

Using chlorophyll (Chl) a fluorescence many aspects of the photosynthetic apparatus can be studied, both in vitro and, noninvasively, in vivo. Complementary techniques can help to interpret changes in the Chl a fluorescence kinetics. Kalaji et al. (Photosynth Res 122:121–158, 2014a) addressed several questions about instruments, methods and applications based on Chl a fluorescence. Here, additional Chl a fluorescence-related topics are discussed again in a question and answer format. Examples are the effect of connectivity on photochemical quenching, the correction of F V/F M values for PSI fluorescence, the energy partitioning concept, the interpretation of the complementary area, probing the donor side of PSII, the assignment of bands of 77 K fluorescence emission spectra to fluorescence emitters, the relationship between prompt and delayed fluorescence, potential problems when sampling tree canopies, the use of fluorescence parameters in QTL studies, the use of Chl a fluorescence in biosensor applications and the application of neural network approaches for the analysis of fluorescence measurements. The answers draw on knowledge from different Chl a fluorescence analysis domains, yielding in several cases new insights.

show abstract

“…However, at 3 DAA there was a significant reduction both for the susceptible population as for the resistant one, extending up to 7 DAA. Yanniccari et al (2012a) have observed greater reduction in the stomatal conductance in biotypes of L. rigidum susceptible to glyphosate in relation to the resistant ones at 7 DAA. When the plant is under stress, it tends to close the stomata as a defense mechanism against water loss, thus increasing resistance, which reduces stomatal conductance (Taiz and Zeiger, 2013), a phenomenon that can be observed after the application of herbicides.…”

Section: Cs Cr Cs Crmentioning

confidence: 65%

“…Hypotheses such as the depletion of protein stocks and carbon drainage from other pathways can be questioned (Duke and Powles, 2008). Some studies have shown a reduction in the photosynthetic rate of weed species after the application of the herbicide glyphosate (Mateos-Naranjo et al, 2009;Yanniccari et al, 2012a).…”

Section: Introductionmentioning

confidence: 99%

Influence of Glyphosate on Susceptible and Resistant Ryegrass Populations to Herbicide

et al. 2017

View full text Add to dashboard Cite

-In Brazil, ryegrass (Lolium multiflorum) has been identified as resistant to glyphosate, becoming a major problem, especially in crops cultivated in the winter season. This herbicide can indirectly affect photosynthesis by inhibiting biosynthesis of many compounds. Thus, the aim of this study was to investigate the influence of glyphosate on the physiological profile of susceptible and resistant ryegrass populations to the herbicide. The experimental design was completely randomized with two treatments (720 and 1,080 g e.a. ha ) and four replications plus control with no treatment. Two ryegrass populations were sown, one susceptible and another one resistant to glyphosate. After the treatments, evaluations were carried out at 1, 3, 7 and 28 days after application (DAA). Variables analyzed were: CO 2 net assimilation rate, stomatal conductance, CO 2 internal concentration, transpiration, water use efficiency and instantaneous carboxylation efficiency. The glyphosate herbicide caused irreversible damage in a susceptible population which at 28 DAA in all variables analyzed this population was already dead and it was impossible to analyze it, but it was shown that the effects of this herbicide were intensified from the third day after application. In the case of the resistant population, at 3 DAA in all variables, it suffered significant effects comparing to the control, showing that even with a high level of resistance the herbicide can affect its metabolism. Keywords

show abstract

Glyphosate effects on gas exchange and chlorophyll fluorescence responses of two Lolium perenne L. biotypes with differential herbicide sensitivity

Cited by 56 publications

References 31 publications

Physiological changes and in the carbohydrate content of sunflower plants submitted to sub-doses of glyphosate and trinexapac-ethyl

Physiological changes and in the carbohydrate content of sunflower plants submitted to sub-doses of glyphosate and trinexapac-ethyl

Frequently asked questions about chlorophyll fluorescence, the sequel

Influence of Glyphosate on Susceptible and Resistant Ryegrass Populations to Herbicide

Contact Info

Product

Resources

About