אסיף מאגר המחקר החקלאי

Root exudate of pmi tomato mutant M161 reduces AM fungal proliferation in vitro

Year:

2003

Source of publication :

Authors :

Volume :

223

Co-Authors:

Gadkar, V., Dept. of Agronomy/Natural Resources, ARO, Volcani Center, PO Box 6, Bet Dagan 50 250, Israel
David-Schwartz, R., Dept. of Agronomy/Natural Resources, ARO, Volcani Center, PO Box 6, Bet Dagan 50 250, Israel
Nagahashi, G., USDA-ARS, Eastern Regional Research Center, 600 East Mermaid Lane, Pennsylvania, PA 19038, United States
Douds Jr., D.D., USDA-ARS, Eastern Regional Research Center, 600 East Mermaid Lane, Pennsylvania, PA 19038, United States
Wininger, S., Dept. of Agronomy/Natural Resources, ARO, Volcani Center, PO Box 6, Bet Dagan 50 250, Israel
Kapulnik, Y., Dept. of Agronomy/Natural Resources, ARO, Volcani Center, PO Box 6, Bet Dagan 50 250, Israel

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Abstract:

Soluble factors released from roots of the pre-mycorrhizal infection (pmi) myc- tomato mutant M161 were analyzed and compared with normal wild-type released factors. Aseptic whole exudates from the M161 mutant retarded the proliferation of Glomus intraradices in vitro. When the whole exudate was further fractionated on a C18 SEPAK cartridge, the 50/70% methanol fraction showed an activity against hyphal tip growth of Gigaspora gigantea and Gl. intraradices. Preliminary characterization of the exudate suggests that the inhibitory moieties are heat labile, bind to PVPP (polyvinyl polypyrrolidone), and are not volatile. This is the first reported instance of the inhibition by a myc- plant being ascribed to inhibitory component(s) released in root exudate. © 2003 Federation of European Microbiological Societies. Published by Elsevier Science B.V. All rights reserved.

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