Secondary Effects of Fungicides in Tomato Seedlings Production

Factor, Thiago Leandro; Júnior, Silva; Purquerio, Luís Felipe Villani; Calori, Alex Humberto

doi:10.17660/actahortic.2011.923.40

Cited by 7 publications

(4 citation statements)

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“…Pyr not only shows fungicidal activity but also displays benefits for plant growth, including increasing net photosynthesis, improving the efficiency of water utilization, activating nitrate reductase, strengthening stress tolerance, and delaying senescence ( Amaro et al., 2019 ). However, Pyr is more likely to improve plant biomass than grain yield due to the compensatory efforts of plants in adjusting yield components ( Swoboda and Pedersen, 2009 ; Factor et al., 2010 ). Albeit with the beneficial regulatory functions, Pyr also exerts adverse effects on plants; for example, Pyr can partially inhibit electron transport in the cytochrome bc1 complex of mitochondria, which leads to reduced ATP production in plants ( Nason et al., 2007 ; Pedersen et al., 2017 ).…”

Section: Introductionmentioning

confidence: 99%

The combined formulation of brassinolide and pyraclostrobin increases biomass and seed yield by improving photosynthetic capacity in Arabidopsis thaliana

Qin

et al. 2023

Front. Plant Sci.

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In the context of global food crisis, applying the phytohormone-brassinosteroids (BRs) in combination with the fungicide-pyraclostrobin (Pyr) was beneficial for plant quality and productivity in several field trials. However, in addition to the benefits of disease control due to the innate fungicidal activity of Pyr, it remains to be understood whether the coapplication of BL+ Pyr exerts additional growth-promoting effects. For this purpose, the effects of BL treatment, Pyr treatment, and BL+ Pyr treatment in Arabidopsis thaliana were compared. The results showed that the yield increased at a rate of 25.6% in the BL+Pyr group and 9.7% in the BL group, but no significant change was observed in the Pyr group. Furthermore, the BL+Pyr treatment increased the fresh weight of both the leaves and the inflorescences. In contrast, the Pyr and BL treatments only increased the fresh weight of leaves and inflorescences, respectively. Additionally, the BL + Pyr treatment increased the Pn, Gs, Tr, Vc, max, Jmax, VTPU, ETR, Fv’/Fm’, ΦPSII, Rd, AYE and Rubisco enzyme activity by 26%, 38%, 40%, 16%, 19%, 15%, 9%, 10%, 17%, 179%, 18% and 32%, respectively. While, these paraments did not change significantly by the BL or Pyr treatments. Treatment with BL + Pyr and Pyr, rather than BL, improved the chlorophyll a and chlorophyll b contents by upregulating genes related to chlorophyll biosynthesis and downregulating genes related to chlorophyll degradation. Additionally, according to transcriptomic and metabolomic analysis, the BL+ Pyr treatment outperformed the individual BL or Pyr treatments in activating the transcription of genes involved in photosynthesis and increasing sugar accumulation. Our results first validated that the combined usage of BL and Pyr exerted striking synergistic effects on enhancing plant biomass and yield by increasing photosynthetic efficiency. These results might provide new understanding for the agricultural effects by the co-application of BL and Pyr, and it might stimulate the efforts to develop new environment-friendly replacement for Pyr to minimize the ecotoxicology of Pyr.

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Section: Introductionmentioning

confidence: 99%

The combined formulation of brassinolide and pyraclostrobin increases biomass and seed yield by improving photosynthetic capacity in Arabidopsis thaliana

Qin

et al. 2023

Front. Plant Sci.

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“…However, no differences were observed in height, total dry mass and leaf area between treatments at 14 DAG. Factor et al (2011) observed contrary results in tomato seedlings treated with pyraclostrobin solution in the substrate, in which after sowing they observed greater shoot growth, number of leaves and root system.…”

Section: Discussionmentioning

confidence: 76%

Fungicides with physiological effects on the formation of grafted tomato seedlings

Amaro¹,

Báron²,

Ramos³

et al. 2018

Aust J Crop Sci

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In tomato, grafting is being used as a preventive measurement of diseases control. During the grafting process, plants tend to overproduce reactive oxygen species in response to injury, controlling oxidative stress. It may be an important factor in achieving success in grafting. The present work aimed to evaluate if the before and after grafting application of pyraclostrobin and boscalid improves the activity of antioxidant enzymes and photosynthetic pigments, resulting in growth improvement of grafted tomato plants during graft union formation. The experimental design was in randomized blocks, with 7 treatments such as: control; pyraclostrobin 0.15 g L-1

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“…Treating plants with biologically active substances affects the action of photosynthetic plant apparatus (tomatoes in particular) and their ability to photosynthesis. Application of the fungicides benomyl (Calatayud & Barreno, 2001), pyraclostrobin, (Factor, Júnior, Purquerio, & Calori, 2011), and 2-chloro-6-(3-methoxyphenyl) aminopurine (inhibitor of cytokinin degradation) (Aremu et al, 2014) was tested in tomatoes.…”

Section: Introductionmentioning

confidence: 99%

The influence of the structure of various isoxazole derivatives on photosynthetic apparatus of tomato plants grown in the field and greenhouse. Effect of various stages of plant growth in different seasons

et al. 2018

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The aim of this study was to determine how various derivatives of isoxazole affect photosynthetic apparatus of different tomato species grown in a greenhouse and under field conditions. Measurements of chlorophyll fluorescence of photosystem II (PSII) were used as an indicator of the stress induced by isoxazoles on photosynthetic energy conversion. Chlorophyll fluorescence yield provides quantitative information not only on steady‐state photosynthesis, but also on various mechanisms of protection against stress‐induced damage and the extent to which performance of photosynthesis is limited by photochemical and non‐photochemical processes. Measurements were made on tomato plants in various stages of growth (from the 3rd to 15th leaf), in different seasons of the year. The data show that the age of plants does not have a significant influence on Fv/Fm values and it seems that younger plants are more sensitive to the used isoxazole derivatives. Selected isoxazoles did not affect the plant photosynthesis. Practical applications The isoxazole derivatives show inhibitory activity against growth of the fungus pathogens. The objective of this work was to test the ability of the chlorophyll fluorescence measurements as an indicator of the changes induced by isoxazole compounds on photosynthetic energy conversion of tomato plants. Regarding importance of tomato as a very popular and widely consumed all over the world vegetable, the effect of different isoxazole derivatives with different fungicidal activity on tomato plant was examined. The use of some of the tested isoxazolines due to their lack of toxicity for the plants is very promising.

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Secondary Effects of Fungicides in Tomato Seedlings Production

Cited by 7 publications

References 0 publications

The combined formulation of brassinolide and pyraclostrobin increases biomass and seed yield by improving photosynthetic capacity in Arabidopsis thaliana

The combined formulation of brassinolide and pyraclostrobin increases biomass and seed yield by improving photosynthetic capacity in Arabidopsis thaliana

Fungicides with physiological effects on the formation of grafted tomato seedlings

The influence of the structure of various isoxazole derivatives on photosynthetic apparatus of tomato plants grown in the field and greenhouse. Effect of various stages of plant growth in different seasons

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