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Polyphenols from Roots Inhibit Growth of Fungal and Oomycete Phytopathogens and Induce Plant Disease Resistance.

08:00 EDT 16th May 2019 | BioPortfolio

Summary of "Polyphenols from Roots Inhibit Growth of Fungal and Oomycete Phytopathogens and Induce Plant Disease Resistance."

A growing world population requires an increase in the quality and quantity of food production. However, field losses due to biotic stresses are currently estimated to be between 10 and 20% worldwide. The risk of resistance and strict pesticide legislation necessitate innovative agronomical practices to adequately protect crops in the future, such as the identification of new substances with novel modes of action. In the present study, liquid chromatography mass spectrometry was used to characterize root extracts that were primarily composed of the stilbenes rhaponticin, desoxyrhaponticin, and resveratrol. Minor components were the flavonoids catechin, epicatechin gallate, and procyanidin B1. Specific polyphenolic mixtures inhibited mycelial growth of several phytopathogenic fungi and oomycetes. Foliar spray applications with fractions containing stilbenes and flavonoids inhibited spore germination of powdery mildew in with indications of synergistic interactions. Formulated extracts led to a significant reduction in the incidence of brown rust in under field conditions. mutant and quantitative reverse-transcription polymerase chain reaction studies suggested that the stilbenes induce salicylic acid-mediated resistance. Thus, the identified substances of roots represent an excellent source of antifungal agents that can be used in horticulture and agriculture.

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This article was published in the following journal.

Name: Plant disease
ISSN: 0191-2917
Pages: PDIS07181168RE

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Medical and Biotech [MESH] Definitions

Endogenous or exogenous substances which inhibit the normal growth of human and animal cells or micro-organisms, as distinguished from those affecting plant growth (= PLANT GROWTH REGULATORS).

A 6-kDa polypeptide growth factor initially discovered in mouse submaxillary glands. Human epidermal growth factor was originally isolated from urine based on its ability to inhibit gastric secretion and called urogastrone. EPIDERMAL GROWTH FACTOR exerts a wide variety of biological effects including the promotion of proliferation and differentiation of mesenchymal and epithelial cells.

Root-like underground horizontal stem of plants that produces shoots above and roots below. Distinguished from true roots which don't have buds and nodes. Similar to true roots in being underground and thickened by storage deposits.

A species of Bacillus that occurs in soil, especially around the roots of some plants where it has anti-fungal and anti-nematode activities. It can also produce enzymes for industrial applications.

A non-pathogenic species of Pseudomonas that occurs in soil, especially in the RHIZOSPHERE surrounding plant roots, as well as on the leaves of plants. It has anti-fungal and anti-nematode activities and is used in agriculture as a biocontrol agent.

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