Pollen viability, physiology, and production of maize plants exposed to pyraclostrobin + epoxiconazole

Junqueira, Verônica Barbosa; Costa, Alan Carlos; Boff, Tatiana; Müller, Caroline; Mendonça, Maria Andréia Corrěa; Batista, Priscila Ferreira

doi:10.1016/j.pestbp.2016.09.007

Cited by 11 publications

(6 citation statements)

References 39 publications

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“…Additionally, in a finding, Parween et al 39 described that Vigna radiata L. under the influence of pesticide displayed a decline in the growth attributes with increasing concentration, showing a reduction in the number and area of the leaf, which might be due to hinderance in the translocation of the photosynthetic rate and the reduction in chlorophyll content. The investigation of numerous photosynthetic pigments and fluorescence parameters of plants raised in fungicides-stressed environments 40 validated that the light reactions of photosynthesis are also very sensitive to the exposure of these chemicals.…”

Section: Resultsmentioning

confidence: 95%

Toxicity of fungicides toPisum sativum: a study of oxidative damage, growth suppression, cellular death and morpho-anatomical changes

et al. 2018

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Section: Resultsmentioning

confidence: 95%

Toxicity of fungicides toPisum sativum: a study of oxidative damage, growth suppression, cellular death and morpho-anatomical changes

et al. 2018

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“…The A, E, iCE and iWUE and POD activity increased in Z. mays plants whose seeds were soaked with in Thiabendazol ® . This can be explained by the fact that Thiabendazol ® is a systemic fungicide of the benzmidazol group (Jalil et al, 2014) that interfere with the photosynthetic system in corn and soybean plants (Junqueira et al, 2017;Junqueira et al, 2021). Thus, some fungicides can positively influence photosynthesis, as they increase the electron transport rate, photosystem II quantum efficiency, resulting in high photosynthetic activity (Rios et al, 2017;Mohamed et al, 2018).…”

Section: Discussionmentioning

confidence: 99%

Eliciators increase gas exchanges and induce the Zea mays antioxidant system

et al. 2022

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The plant elicitors use as an agricultural input is limited and few studies show their influence on physiological responses. However, its use can induce broad-spectrum and long-lasting resistance in plants by inducing defense systems, primary and secondary metabolism. The the aim of this study was to evaluate the gas exchange (gs, A, E, Ci, WUE, iWUE and iCE) and enzymatic antioxidant system (POD, PPO and PAL) of Z. mays under elicitors application. The experiment was carried out in a completely randomized design with seven treatments: control (sterilized distilled water); Rocksil® (3 g L-1); Poagrim® (3 g L-1); Bion® (0.4 g L-1); Agrosilicon Plus® (3 g L-1); Ecolife® (3 mL L-1); Thiabendazol® (1 g L-1), with four repetitions and three plants per repetition. Gas exchange (net photosynthesis [A], stomatal conductance [gs], internal carbon concentration [Ci], transpiration rate [E], instantaneous water use efficiency [WUE= A/E], intrinsic water use efficiency [iWUE= A/gs], instantaneous carboxylation efficiency [iCE= A/Ci], and enzymatic activity (peroxidase [POX], polyphenol oxidase [PPO], phenylalanine ammonia-lyase [PAL]) were evaluated at 40 and 45 days after sowing. Gs, A, WUE, iCE and peroxidase activity increased in plants whose seeds were soaked with Rocksil® and Thiabendazol®. The phenylalanine ammonia-lyase activity was reduced in plants from seeds soaked in Ecolife®. The elicitors increased the gas exchange and antioxidant system of Zea mays L.

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“…In both varieties, the use of the preparation increased respiration rates, although the increase in respiration in the ‘Ambrosini’ plants was observed to be much higher. In similar experiments, the application of pyraclostrobin + epoxiconazole fungicides in maize did not cause changes in stomatal conductance, although the authors suggested that the plants were not under stress [59]. Furthermore, the authors indicated that using pyraclostrobin + epoxiconazole at the recommended dose did not cause toxic effects [59].…”

Section: Discussionmentioning

confidence: 99%

Can pyraclostrobin and epoxiconazole protect conventional and stay-green maize varieties grown under drought stress?

et al. 2019

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Risks associated with drought are increasing and are a global problem. Therefore, there is a need for new solutions for the safe production of food, while maintaining respect for the environment. Fungicides are designed to protect maize plants against disease, but some of the active substances used in preparations can also promote plant growth, which is known as the ‘physiological effect’. However, there is a paucity of information as to how some of the ‘new generation’ fungicides act in stimulating grain yield in plants under abiotic stress, especially drought. Therefore, the effects of these products on conventional and stay-green maize varieties need to be better understood in order to reduce losses caused by droughts and to maximize production. In this study, the effect of a pyraclostrobin + epoxiconazole fungicide preparation on maize plants was evaluated at different times after spraying; during induced drought conditions and again during the regeneration process of the plants. The preparation was applied to ‘KWS 1325’ (conventional) and ‘Ambrosini’ (stay-green) varieties at the recommended dose, three times in greenhouse conditions. Plant gas exchange, plant water use efficiency, chlorophyll fluorescence and fresh and dry plant biomass were evaluated. The pyraclostrobin + epoxiconazole preparation increased stomatal conductance and photosynthesis intensity in the ‘Ambrosini’ plants. When maintained under a high light intensity, the variety used increased efficiency and exchanged excessive energy in the form of thermal energy to protect the maize leaf from light-induced damage under drought stress. Plant photosynthetic efficiency (ETR and Yield parameters) during drought stress and after regeneration was significantly higher in treated plants than in the controls. Thus, the beneficial effects on the physiology of the maize varieties grown under drought stress from the fungicide application are significant for farmers and growers.

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Pollen viability, physiology, and production of maize plants exposed to pyraclostrobin + epoxiconazole

Cited by 11 publications

References 39 publications

Toxicity of fungicides toPisum sativum: a study of oxidative damage, growth suppression, cellular death and morpho-anatomical changes

Toxicity of fungicides toPisum sativum: a study of oxidative damage, growth suppression, cellular death and morpho-anatomical changes

Eliciators increase gas exchanges and induce the Zea mays antioxidant system

Can pyraclostrobin and epoxiconazole protect conventional and stay-green maize varieties grown under drought stress?

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