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Web URL(s): | http://apsjournals.apsnet.org/doi/pdfplus/10.1094/PHYTO.2001.91.7.687 Last checked: 08/25/2010 Requires: PDF Reader |
Publication Type:
| Refereed |
Author(s): | Sharon, E.;
Bar-Eyal, M.;
Chet, I.;
Herrera-Estrella, A.;
Kleifeld, O.;
Spiegel, Y. |
Author Affiliation: | Sharon, Bar-Eyal and Spiegel: Department of Nematology, Agricultural Research Organization, The Volcani Center, Bet-Dagan, Israel; Chet: Otto Warburg Center for Agricultural Biotechnology, Faculty of Agricultural, Food and Environmental Quality Sciences, The Hebrew University of Jerusalem, Rehovot, Israel; Herrera-Estrella: Centro de Investigación y Estudios Avanzados, Plant Biotechnology and Genetic Engineering Unit, Irapuato, Gto., Mexico; Kleifeld: Mycontrol Ltd., Alon-Hagalil, Israel |
Title: | Biological control of the root-knot nematode Meloidogyne javanica by Trichoderma harzianum |
Section: | Biological control Other records with the "Biological control" Section
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Source: | Phytopathology. Vol. 91, No. 7, July 2001, p. 687-693. |
Publishing Information: | St. Paul, MN: American Phytopathological Society |
# of Pages: | 7 |
Keywords: | TIC Keywords: Biological control; Meloidogyne; Meloidogyne javanica; Trichoderma harzianum; Fungi
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Abstract/Contents: | "The fungal biocontrol agent, Trichoderma harzianum, was evaluated for its potential to control the root-knot nematode Meloidogyne javanica. In greenhouse experiments, root galling was reduced and top fresh weight increased in nematode-infected tomatoes following soil pretreatment with Trichoderma peat-bran preparations. The use of a proteinase Prb1-transformed line (P-2) that contains multiple copies of this gene improved biocontrol activity in the greenhouse experiments compared with the nontransformed wild-type strain (WT). All the Trichoderma strains showed the ability to colonize M. javanica-separated eggs and second-stage juveniles (J2) in sterile in vitro assays, whereas P-2 also penetrated the egg masses. This protease-transformed line presented the same nematicidal and overall proteolytic activity as the WT in in vitro tests in which concentrated soil extracts from Trichoderma-treated soils immobilized the infective J2. However, the J2 immobilization and proteolytic activities of both P-2 and WT were higher than those obtained with strain T-203. Characterization of the activity of all Trichoderma strains soil extracts on J2 showed that it was heat resistant and restricted to the low-molecular-weight fraction (less than 3 kDa). It is suggested that improved proteolytic activity of the antagonist may be important for the biological control of nematodes." |
Language: | English |
References: | 32 |
Note: | Pictures, b/w Tables Graphs |
| ASA/CSSA/SSSA Citation (Crop Science-Like - may be incomplete): Sharon, E., M. Bar-Eyal, I. Chet, A. Herrera-Estrella, O. Kleifeld, and Y. Spiegel. 2001. Biological control of the root-knot nematode Meloidogyne javanica by Trichoderma harzianum. Phytopathology. 91(7):p. 687-693. |
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| Web URL(s): http://apsjournals.apsnet.org/doi/pdfplus/10.1094/PHYTO.2001.91.7.687 Last checked: 08/25/2010 Requires: PDF Reader |
| MSU catalog number: SB 599 .P48 |
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