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Formation and germination of Phytophthora infestans oospores in different regions of Russia.
Commun Agric Appl Biol Sci. 2008; 73(2):109-18.CA

Abstract

On occurrence of oospores (sexual stage), 88 Phytophthora infestans populations were investigated. The populations were collected in 14 regions of Russia. In total, 3677 samples have been checked: 2888--from potato leaflets (55 populations), 344--from tomato leaflets (16 populations), 445--from tomato fruits (17 populations). The oospores have been detected both in potato and tomato leaflets and in fruits with different occurrence--4.4%, 11.9%, and 28.8%. Occurrence of oospores per sample was also maximal in tomato fruits. After overwintering a majority of oospores (50-90%) kept their viability. Sometimes, loss of viability of some oospores was caused by the external negative influence. About 25% of oospores formed at crossing between current Russian P. infestans strains were capable to germinate. Treatment with negative temperature (-12 degrees C) or Trichoderma suspension increased percentage of germinated oospores. In some field trials, the oospores caused affection of quite many of potato plants. However, in other trials only particular plants or no plants were affected. Tomato germlings were affected only under unfavourable conditions.

Authors+Show Affiliations

Russian State Agrarian University - Moscow Timiryazev Agricultural Academy Department of Phytopathology, Timyryazevskaya 45, Moscow 127550 Russia. alsmir1@rambler.ruNo affiliation info availableNo affiliation info availableNo affiliation info available

Pub Type(s)

Journal Article
Research Support, Non-U.S. Gov't

Language

eng

PubMed ID

19226748

Citation

Smirnov, A N., et al. "Formation and Germination of Phytophthora Infestans Oospores in Different Regions of Russia." Communications in Agricultural and Applied Biological Sciences, vol. 73, no. 2, 2008, pp. 109-18.
Smirnov AN, Kuznetsov SA, Kvasnyuk NY, et al. Formation and germination of Phytophthora infestans oospores in different regions of Russia. Commun Agric Appl Biol Sci. 2008;73(2):109-18.
Smirnov, A. N., Kuznetsov, S. A., Kvasnyuk, N. Y., & Deahl, K. L. (2008). Formation and germination of Phytophthora infestans oospores in different regions of Russia. Communications in Agricultural and Applied Biological Sciences, 73(2), 109-18.
Smirnov AN, et al. Formation and Germination of Phytophthora Infestans Oospores in Different Regions of Russia. Commun Agric Appl Biol Sci. 2008;73(2):109-18. PubMed PMID: 19226748.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Formation and germination of Phytophthora infestans oospores in different regions of Russia. AU - Smirnov,A N, AU - Kuznetsov,S A, AU - Kvasnyuk,N Ya, AU - Deahl,K L, PY - 2009/2/21/entrez PY - 2009/2/21/pubmed PY - 2009/4/15/medline SP - 109 EP - 18 JF - Communications in agricultural and applied biological sciences JO - Commun. Agric. Appl. Biol. Sci. VL - 73 IS - 2 N2 - On occurrence of oospores (sexual stage), 88 Phytophthora infestans populations were investigated. The populations were collected in 14 regions of Russia. In total, 3677 samples have been checked: 2888--from potato leaflets (55 populations), 344--from tomato leaflets (16 populations), 445--from tomato fruits (17 populations). The oospores have been detected both in potato and tomato leaflets and in fruits with different occurrence--4.4%, 11.9%, and 28.8%. Occurrence of oospores per sample was also maximal in tomato fruits. After overwintering a majority of oospores (50-90%) kept their viability. Sometimes, loss of viability of some oospores was caused by the external negative influence. About 25% of oospores formed at crossing between current Russian P. infestans strains were capable to germinate. Treatment with negative temperature (-12 degrees C) or Trichoderma suspension increased percentage of germinated oospores. In some field trials, the oospores caused affection of quite many of potato plants. However, in other trials only particular plants or no plants were affected. Tomato germlings were affected only under unfavourable conditions. SN - 1379-1176 UR - https://www.unboundmedicine.com/medline/citation/19226748/Formation_and_germination_of_Phytophthora_infestans_oospores_in_different_regions_of_Russia_ DB - PRIME DP - Unbound Medicine ER -