Disease Alterations in Permeability and Membranes

Wheeler, Harry

doi:10.1016/b978-0-12-356403-0.50023-3

Cited by 14 publications

(4 citation statements)

References 61 publications

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“…This time lag in protoplast response following treatment suggests that the SGF inflicted protoplast damage probably does not involve a direct effect of SGFs on the cell membrane and therefore is a secondary biochemical lesion. Wheeler (1978) has suggested that the pathogen toxin induced cell membrane damage could be the indirect effect of toxin induced mitochondrial dysfunction causing disruption of energy supply for the maintenance and repair of the membrane. Recently, Uehara et al (1997), while studying the effect of SGFs of rice infecting strain of M. grisea on leaves of the host (rice cv.…”

Section: Resultsmentioning

confidence: 99%

Host Species‐Specific Protoplast Damaging Activity of Spore Germination Fluids of Blast Pathogen Magnaporthe grisea

Rathour

Singh

Plaha

2002

Journal of Phytopathology

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The effect of spore germination fluids (SGFs) of rice and ragi (Eleusine coracana) limited forms of Magnaporthe grisea was studied on the protoplasts of host and non‐host species to determine their host specificity. The concentrated SGFs of rice strain of M. grisea exhibited strong disruptive activity against the protoplasts of two rice cultivars, Fukunishiki and Caloro, but had little effect on the protoplasts of ragi cv. VL 17 and Podophyllum hexandrum. However, the SGFs of ragi strain of M. grisea showed a high tendency to disrupt ragi protoplasts but inflicted less damage on protoplasts of the two rice cultivars and P. hexandrum. These results suggest that SGFs of M. grisea contain some factor(s) which exhibit host species‐specific activity and may be the determinants of basic compatibility.

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Section: Resultsmentioning

confidence: 99%

Host Species‐Specific Protoplast Damaging Activity of Spore Germination Fluids of Blast Pathogen Magnaporthe grisea

Rathour

Singh

Plaha

2002

Journal of Phytopathology

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“…When plant pathogens attack host cells, the enzymes or phytotoxins produced by the pathogen adversely affect the host tissue cell wall and/or membrane (Wheeler, 1978). A high, negative and linear correlation (r=-0.985, p=0.05) was found between these two variants.…”

Section: Discussionmentioning

confidence: 95%

Quantitative assessment of the interaction between the antagonistic fungus Talaromyces flavus and the wilt pathogen Verticillium dahliae on eggplant roots

Fahima

Henis

1995

Plant Soil

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Quantitative aspects of the interaction between the antagonist Talaromycesflavus, the pathogen Verticillium dahliae and eggplant roots, were studied. When eggplant roots were inoculated with T. flavus, prior to the infection with the pathogen, the population density of T.flavus on V. dahliae-infected roots was at least 3 times higher than on healthy uninfected roots, and the proliferation of T. flavus on diseased eggplant roots was related to the severity of wilt symptoms, in the two levels of application of T. flavus studied. However, in all classes of disease severity tested (disease index, 0-3), the population density of T. Flavus on eggplant roots treated with 106 ascospores g-1 rooting mixture was significantly (p=0.05) higher than with 105 ascospores g-l. In roots treated with 105 and 106 T. flavus ascospores g-l rooting mixture, the population density of V. dahliae was reduced by 51% and 69%, respectively. When testing the relationships between the population density of V. dahliae in the roots and disease severity, no significant (p=0.05) difference was found between disease indexes 2 and 3. However, the density of V. dahliae on roots of plants with disease index 1 was significantly (p=0.05) lower than disease indexes 2 and 3. The positive relationship between the inoculum concentration of V. dahliae and the population d e n n y of T. flavus developed on eggplant roots was significant (p=0.001), linear, and highly correlated (r=0.945) on a logarithmic scale. In addition, the analysis of these data revealed a significant (p=0.05), high, negative and linear correlation (r=-0.985) between the log concentration of V. dahliae inoculum and the disease reduction achieved by T. flavus.

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“…The lipid asymmetry is interrupted reducing the hydrophobicity of the inner layer of lipid membrane causing depolarization [ 50 ]. As a result, membrane integrity may be lost [ 51 ]. Regardless of the above, lipid peroxidation products are chemically reactive molecules due to their carbon-carbon double bond structure and electrophilic characteristics, which reacts with the cell’s nucleophilic components, including DNA, lipids, peptides, and proteins, leading to disturbances in cell metabolism.…”

Section: Discussionmentioning

confidence: 99%

Evaluation of Chemical Composition, Radical Scavenging and Antitumor Activities of Satureja hortensis L. Herb Extracts

Bimbiraitė-Survilienė

Stankevičius

Šuštauskaitė

et al. 2021

Antioxidants

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Satureja hortensis L. is an annual herbaceous plant of the Lamiaceae Lindl. family. S. hortensis L., related to thyme and rosemary, is used as spice and traditional medicinal herb in Europe. Mainly due to the polyphenols contained in S. hortensis L., this plant exhibits multiple biological effects. However, therapeutic effects on cells, including skin tumors, have not yet been studied. Therefore, the aim of this study was to compare the composition and the resulting antioxidant as well as biological properties [on melanocytes and melanoma cells] of summer, savory growing in botanical garden of Vytautas Magnus University in middle Lithuania climatic conditions, collected during various phases of vegetation. It has been shown that the budding phase alcohol extract of this plant contains the largest amounts of polyphenols, including rutin and rosemary acid, which promote the radical scavenging activity and antioxidant properties. In contrast, the extract from the massive flowering phase already at a concentration of 12.5 µg/mL reduces the survival of melanoma cells to 60% with 90% melanocytes survival. In addition, extracts from beginning of flowering and end of flowering at a concentration of 25 µg/mL, containing significantly less rutin and rosmarinic acid, in combination with irradiation of cells with UVB, significantly increased the lipid peroxidation process, particularly in melanoma cells. These data indicate the possibility of using extracts from S. hortensis L. to modulate/differentiate the metabolism of normal and tumor skin cells.

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Disease Alterations in Permeability and Membranes

Cited by 14 publications

References 61 publications

Host Species‐Specific Protoplast Damaging Activity of Spore Germination Fluids of Blast Pathogen Magnaporthe grisea

Host Species‐Specific Protoplast Damaging Activity of Spore Germination Fluids of Blast Pathogen Magnaporthe grisea

Quantitative assessment of the interaction between the antagonistic fungus Talaromyces flavus and the wilt pathogen Verticillium dahliae on eggplant roots

Evaluation of Chemical Composition, Radical Scavenging and Antitumor Activities of Satureja hortensis L. Herb Extracts

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