Physiological changes in tomato leaves arising from Xanthomonas gardneri infection

Silveira, Patrícia Ricardino; Nascimento, Kelly Juliane Telles; Andrade, Camila Cristina Lage de; Bispo, Wilka Messner Silva; Oliveira, José Rogério de; Rodrigues, Fabrício Ávila

doi:10.1016/j.pmpp.2015.10.001

Cited by 24 publications

(27 citation statements)

References 44 publications

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“…Most of the parameters of Chl a fluorescence began to show alterations of their values in the infected leaves at 10 dai although the changes in their images occurred from 5 dai. This finding confirms the potential of using the Chl a fluorescence imaging as a tool for providing information regarding changes in physiological processes related to photosynthetic performance of plants before the occurrence of clear disease symptoms ( Silveira et al 2015, Tatagiba et al 2015, Bermúdez-Cardona et al 2015a. For many host-pathogen interactions, a decrease in A is linked with low gs and high ci (Lopes and Berger 2001, Tatagiba et al 2015, Bermúdez-Cardona et al 2015a.…”

Section: Discussionsupporting

confidence: 71%

“…Chlorophyll a fluorescence imaging: The images and fluorescence parameters of Chl a, maximum quantum yield of photosystem (PS) II (Fv/Fm), effective quantum yield of PS II (Fv'/Fm'), quantum yield of regulated energy dissipation (NPQ), and quantum yield of nonregulated energy dissipation Y(NO) were obtained at 5, 10, 15, and 20 dai using an IMAGING-PAM fluorometer (a Maxi version) and the Imaging Win software (Heinz Walz, Effeltrich, Germany). In order to obtain images at a resolution of 640 × 480 pixels, the fourth leaf was used to obtain the images of Chl a fluorescence following the procedures previously described (Debona et al 2014, Silveira et al 2015, Bermúdez-Cardona et al 2015b, Tatagiba et al 2015, Bispo et al 2016, Rios et al 2017, Rios et al 2018.…”

Section: Leaf Gas Exchange Parametersmentioning

confidence: 99%

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Changes in leaf gas exchange, chlorophyll a fluorescence, and antioxidantsin maize leaves infected by Exserohilum turcicum

Silveira¹,

Milagres²,

Corrêa³

et al. 2019

Biol. plant.

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Considering the importance of northern leaf blight, caused by Exserohilum turcicum, to decrease maize yield, this study evaluated electrolyte leakage, content of H2O2, malondialdehyde (MDA), chlorophyll (Chl) a, Chl b, and carotenoids (CAR), and activities of superoxide dismutase, catalase, ascorbate peroxidase, peroxidase, glutathione reductase, glutathione-S-transferase, and glutathione peroxidase, as well as expressions of superoxide dismutase (sod), catalase (cat 1), ascorbate peroxidase (apx 2), peroxidase (pox), glutathione reductase (gr 1), and glutathione-S-transferase (gst 23) genes, and leaf gas exchange and Chl a fluorescence parameters in maize leaves infected with E. turcicum. The content of H2O2 and MDA was high at 15 and 20 d after inoculation (dai) and electrolyte leakage was high from 10 dai onward in infected leaves. Net assimilation rate, stomatal conductance to water vapour, transpiration rate, internal CO2 concentration, maximum quantum yield of photosystem (PS) II, and effective quantum yield of PS II significantly decreased as the disease developed. Quantum yield of regulated energy dissipation significantly increased at 10 and 15 dai but decreased at 20 dai whereas the quantum yield of non-regulated energy dissipation significantly increased at 15 and 20 dai. The content of Chl a, Chl b, and CAR decreased in infected leaves. The activities of the enzymes increased, and the relative expressions of the genes sod, cat 1, apx 2, pox, gr 1, and gst 23 were higher in infected leaves compared to non-infected ones mainly from 10 dai onward. In conclusion, photosynthesis in infected leaves was dramatically affected and a late involvement of the antioxidant metabolism was not sufficiently helpful to counteract the deleterious effects of fungal infection.

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Section: Discussionsupporting

confidence: 71%

Section: Leaf Gas Exchange Parametersmentioning

confidence: 99%

Changes in leaf gas exchange, chlorophyll a fluorescence, and antioxidantsin maize leaves infected by Exserohilum turcicum

Silveira¹,

Milagres²,

Corrêa³

et al. 2019

Biol. plant.

Self Cite

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“…Increased activities of the antioxidant enzymes APX, POX and SOD were noticed only for the isolate Xcc 10. SOD represents the first line of defence against pathogen‐induced oxidative stress by converting

O_{2}^{-}

into H 2 O 2 , which is removed by APX and POX (Fagundes‐Nacarath et al, ; Silveira et al, ). APX is able to reduce H 2 O 2 to H 2 O and is important on the removal of H 2 O 2 from chloroplasts, peroxisomes and mitochondria (Chandrashekar & Umesha, ).…”

Section: Discussionmentioning

confidence: 99%

Biochemical insights into basal and induced resistance in cabbage to black rot

Amaral

Debona

Costa

et al. 2019

Journal of Phytopathology

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Black rot, caused by Xanthomonas campestris pv. campestris (Xcc), is the most devastating disease of brassica, but the mechanisms of basal or induced resistance in cabbage remain largely unknown. Here, we performed three experiments to investigate biochemical features associated with cabbage resistance to black rot. In the first experiment, biochemical changes were assessed in plants that were inoculated with a highly (UFPR 5) or a moderately (Xcc 10) aggressive Xcc isolate. In the second experiment, we examined the biochemical responses in two cultivars (Chato de Quintal [CQ] and Louco de Verão [LV], susceptible and moderately resistant to Xcc, respectively). Finally, we examined whether acibenzolar‐S‐methyl (ASM) could induce cabbage resistance to Xcc. Plants inoculated with the Xcc 10 isolate displayed higher activities of superoxide dismutase (SOD), peroxidase (POX) and ascorbate peroxidase (APX), whereas activities of chitinase (CHI), β‐1,3‐glucanase (GLU) and polyphenol oxidase (PPO) as well as the concentrations of hydrogen peroxide (H2O2) and malondialdehyde (MDA) were lower compared to plants inoculated with the UFPR 5 isolate. The resistance of the cultivar LV to Xcc was linked to increases in the activities of CHI, GLU, and PPO and decreases in the activities of SOD, POX and APX as well as in the concentrations of H2O2 and MDA relative to the cultivar CQ. In general, ASM‐sprayed plants displayed higher activities for the enzymes studied, which was associated with decreased disease symptoms and oxidative stress. Taken together, our results demonstrated that high activities of both defence and antioxidant enzymes played a major role in both basal and induced resistance of cabbage to black rot.

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“…The ELISA data highlight that the effect of T22 was particularly clear when it was applied after CMV inoculation (PF). Counteracting the spread of symptoms, T22 prevents a reduction in green photosynthetic tissues and the degradation of pigments, which has been observed in plants infected by CMV (PC) and in other pathosystems ( Silveira et al, 2015 ).…”

Section: Discussionmentioning

confidence: 99%

Trichoderma harzianum T-22 Induces Systemic Resistance in Tomato Infected by Cucumber mosaic virus

et al. 2016

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Understanding the induction of plant defenses against viruses using biocontrol agents is essential for developing new strategies against these pathogens, given the ineffectiveness of chemical treatments. The ability of Trichoderma harzianum, strain T-22 (T22) to control Cucumber mosaic virus (CMV) in Solanum lycopersicum var. cerasiforme plants and the changes in the physiology of tomato treated/infected with T22/CMV were examined. Plant growth-promoting effects, photosynthetic performance, reactive oxygen species scavenging enzymes, and phytohormones were investigated. T22 improved tomato growth in terms of plant height and improved photosynthesis, total chlorophyll content and plant gas exchange. In contrast, CMV induced a negative effect on dry matter accumulation and inhibited the photosynthetic capacity. The analysis of plant hormones demonstrated that treating with T22 before or simultaneously to CMV infection, led to a systemic resistance by jasmonic acid/ethylene and salicylic acid signaling pathways. Conversely, systemic resistance was abscissic acid-dependent when T22 treatment was administered after the CMV infection. In conclusion, the data reported here indicate that the T22-based strategy may be the most effective measure against CMV.

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Physiological changes in tomato leaves arising from Xanthomonas gardneri infection

Cited by 24 publications

References 44 publications

Changes in leaf gas exchange, chlorophyll a fluorescence, and antioxidantsin maize leaves infected by Exserohilum turcicum

Changes in leaf gas exchange, chlorophyll a fluorescence, and antioxidantsin maize leaves infected by Exserohilum turcicum

Biochemical insights into basal and induced resistance in cabbage to black rot

Trichoderma harzianum T-22 Induces Systemic Resistance in Tomato Infected by Cucumber mosaic virus

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