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Open AccessArticle

Peptide Extracts from Seven Medicinal Plants Discovered to Inhibit Oomycete Phytophthora infestans, a Causative Agent of Potato Late Blight Disease

1
Shemyakin and Ovchinnikov Institite of Bioorganic Chemistry Russian Academy of Sciences, 117997 Moscow, Russia
2
Gause Institute of New Antibiotics, 119021 Moscow, Russia
3
All-Russian Institute of Plant Protection, 196608 St.-Petersburg-Pushkin, Russia
4
Institute of Biological and Agricultural Biology (X-Bio) Tyumen State University, Russian Federation, 625003 Tyumen, Russia
5
Timiryazev Russian State Agrarian University, 127550 Moscow, Russia
*
Author to whom correspondence should be addressed.
Deceased on 6 October 2014.
Plants 2020, 9(10), 1294; https://doi.org/10.3390/plants9101294
Received: 13 September 2020 / Revised: 22 September 2020 / Accepted: 24 September 2020 / Published: 30 September 2020
(This article belongs to the Section Plant Protection and Biotic Interactions)
We report the inhibitory effect of peptide extracts obtained from seven medicinal plants against a causative agent of late blight disease Phytophthora infestans. We find that all the extracts possess inhibitory activity toward the zoospores output, zoosporangium germination, and the development of P. infestans on potato disc tubers at different quantitative levels. Based on the biological effects detected, an extract of common horsetail (Equisetum arvense) biomass is recognized as the most effective and is selected for further structural analysis. We perform a combination of amino acid analysis and MALDI-TOF mass spectrometry, which reveal the presence of Asn/Asp- and Gln/Glu-rich short peptides with molecular masses in the range of 500–900 Da and not exceeding 1500 Da as the maximum. Analytical anion-exchange HPLC is successfully applied for separation of the peptide extract from common horsetail (E. arvense). We collect nine dominant components that are combined in two groups with differences in retention times. The N-terminal amino acid sequence of the prevalent compounds after analytical ion-exchange HPLC allows us to identify them as peptide fragments of functionally active proteins associated with photosynthesis, aquatic transport, and chitin binding. The anti-oomycete effects may be associated with the conversion of ribulose-1,5-bisphosphate carboxylase/oxygenase to produce a number of biologically active anionic peptides with possible regulatory functions. These data inform our knowledge regarding biologically active peptide fragments; they are the components of programmed or induced proteolysis of plant proteins and can realize secondary antimicrobial functions. View Full-Text
Keywords: medicinal plants; amino acid composition; liquid chromatography; anti-oomycete activity; Phytophthora infestans; peptide fragments; protein hydrolysis medicinal plants; amino acid composition; liquid chromatography; anti-oomycete activity; Phytophthora infestans; peptide fragments; protein hydrolysis
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MDPI and ACS Style

Rogozhin, E.A.; Vasilchenko, A.S.; Barashkova, A.S.; Smirnov, A.N.; Zavriev, S.K.; Demushkin, V.P. Peptide Extracts from Seven Medicinal Plants Discovered to Inhibit Oomycete Phytophthora infestans, a Causative Agent of Potato Late Blight Disease. Plants 2020, 9, 1294.

AMA Style

Rogozhin EA, Vasilchenko AS, Barashkova AS, Smirnov AN, Zavriev SK, Demushkin VP. Peptide Extracts from Seven Medicinal Plants Discovered to Inhibit Oomycete Phytophthora infestans, a Causative Agent of Potato Late Blight Disease. Plants. 2020; 9(10):1294.

Chicago/Turabian Style

Rogozhin, Eugene A.; Vasilchenko, Alexey S.; Barashkova, Anna S.; Smirnov, Alexey N.; Zavriev, Sergey K.; Demushkin, Vladimir P. 2020. "Peptide Extracts from Seven Medicinal Plants Discovered to Inhibit Oomycete Phytophthora infestans, a Causative Agent of Potato Late Blight Disease" Plants 9, no. 10: 1294.

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