Effect of phytotoxic secondary metabolites and semisynthetic compounds from endophytic fungus Xylaria feejeensis strain SM3e-1b on spinach chloroplast photosynthesis

Macías-Rubalcava, Martha Lydia; García-Méndez, Marbella Claudia; King-Dı́az, Beatriz; Macı́as-Ruvalcaba, Norma A.

doi:10.1016/j.jphotobiol.2016.11.002

Cited by 15 publications

(11 citation statements)

References 46 publications

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“…The basal electron flow was increased at low concentrations (around 15 μM), but electron flow at concentrations higher than 25 μM was decreased, inhibiting electron flow by 20% at 100 μM, which means that ( 1 ) binds to the CF 1 CF 0 -ATP ase complex, suggesting inhibitory activity on ATP synthesis. The results found, with regard to electron-transport reaction, a increment of the step as well as a decrease in the phosphorylating and uncoupled steps, indicating that ( 1 ) exhibited a dual effect by inhibiting both energy transfer and electron transport [ 17 ].…”

Section: Resultsmentioning

confidence: 99%

“…When there is a significant increase on the basal electron-transport step, as observed for Compounds 1 , 4 , and 6 – 8 , this is an indication that the compounds are acting on the ATP–synthase complex [ 17 ]. Cyclic electron transport is happening normally, as can be observed in the basal reaction, due the behavior of the chloroplasts in the reaction medium.…”

Section: Resultsmentioning

confidence: 99%

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Evaluation of Alkaloids Isolated from Ruta graveolens as Photosynthesis Inhibitors

et al. 2018

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Eight alkaloids (1–8) were isolated from Ruta graveolens, and their herbicide activities were evaluated through in vitro, semivivo, and in vivo assays. The most relevant results were observed for Compounds 5 and 6–8 at 150 μM, which decreased dry biomass by 20% and 23%, respectively. These are significant results since they presented similar values with the positive control, commercial herbicide 3-(3,4-dichlorophenyl)-1,1-dimethylurea (DCMU). Based on the performed assays, Compound 5 (graveoline) is classified as an electron-transport inhibitor during the light phase of photosynthesis, as well as a plant-growth regulator. On the other hand, Compounds 6–8 inhibited electron and energy transfers, and are also plant-growth inhibitors. These phytotoxic behaviors based on acridone and quinolone alkaloids may serve as a valuable tool in the further development of a new class of herbicides since natural products represent an interesting alternative to replace commercial herbicides, potentially due their low toxicity.

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Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

Evaluation of Alkaloids Isolated from Ruta graveolens as Photosynthesis Inhibitors

et al. 2018

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“…The arbuscular mycorrhizal interaction in alfalfa also significantly reduces the negative effects of the herbicide atrazine, a PSII electron transport inhibitor, on chloroplast structure and PSII performance, but does not mitigate the negative effects on chloroplast pigment accumulation [58]. In contrast, secondary metabolites, such as coriloxine or quinone derivatives from the endophytic fungus Xylaria feejeensis, have negative effects on ATP synthesis of spinach thylakoid preparations, and these compounds can further be chemically modified to show even greater effects against photosynthetic functions [59].…”

Section: Positive Influences Of Fungi On Chloroplast Functionmentioning

confidence: 99%

Chloroplasts and Plant Immunity: Where Are the Fungal Effectors?

et al. 2019

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Chloroplasts play a central role in plant immunity through the synthesis of secondary metabolites and defense compounds, as well as phytohormones, such as jasmonic acid and salicylic acid. Additionally, chloroplast metabolism results in the production of reactive oxygen species and nitric oxide as defense molecules. The impact of viral and bacterial infections on plastids and chloroplasts has been well documented. In particular, bacterial pathogens are known to introduce effectors specifically into chloroplasts, and many viral proteins interact with chloroplast proteins to influence viral replication and movement, and plant defense. By contrast, clear examples are just now emerging for chloroplast-targeted effectors from fungal and oomycete pathogens. In this review, we first present a brief overview of chloroplast contributions to plant defense and then discuss examples of connections between fungal interactions with plants and chloroplast function. We then briefly consider well-characterized bacterial effectors that target chloroplasts as a prelude to discussing the evidence for fungal effectors that impact chloroplast activities.

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“…Of all the compounds, only 17a and 17d inhibited ATP synthesis, basal and uncoupled electron transport, and enhanced the phosphorylating electron transport and Mg 2+ -ATPase enzymatic activity when tested in a series of photosynthetic light reactions in freshly lysed spinach chloroplasts. Overall, these results indicated that 17a acted as an uncoupler and a weak Hillʼs reaction inhibitor, whereas 17d acted as a Hillʼs reaction inhibitor at the photosystem II [84]. Thus, coriloxine derivatives represented new leads for the development of novel herbicides.…”

Section: Endophytes From Plants Collected In Sierra De Huautla Biosphmentioning

confidence: 90%

Insights in Fungal Bioprospecting in Mexico

et al. 2018

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Fungi have consistently been one of the richest sources of natural products, with unprecedented chemical scaffolds and potent biological activities. During the last 20 years, pharmacognosy researchers in Mexico, in collaboration with mycologists, have discovered many novel bioactive fungi natural products and new fungal species. To date, more than 100 bioactive secondary metabolites from 20 fungi from different ecosystems throughout Mexico have been documented in peer-reviewed literature according to Scopus and SciFinder databases. These include compounds from different biosynthetic origins and structural cores with the potential for the development of anticancer, antidiabetic, and/or pesticide agents.

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Effect of phytotoxic secondary metabolites and semisynthetic compounds from endophytic fungus Xylaria feejeensis strain SM3e-1b on spinach chloroplast photosynthesis

Cited by 15 publications

References 46 publications

Evaluation of Alkaloids Isolated from Ruta graveolens as Photosynthesis Inhibitors

Evaluation of Alkaloids Isolated from Ruta graveolens as Photosynthesis Inhibitors

Chloroplasts and Plant Immunity: Where Are the Fungal Effectors?

Insights in Fungal Bioprospecting in Mexico

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