Journal
JOURNAL OF PHYTOPATHOLOGY
Volume 157, Issue 4, Pages 256-261Publisher
WILEY
DOI: 10.1111/j.1439-0434.2008.01468.x
Keywords
nematodes; phloem; plant parasites; plasmodesmata; sugar supply
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Funding
- Austrian Science Fund [P16897-B06]
- Austrian Science Fund (FWF) [P16897] Funding Source: Austrian Science Fund (FWF)
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The plant parasitic nematode Meloidogyne incognita is as an obligate parasite entirely dependent on the plants solute supply. Therefore, the nematodes induce the formation of several giant cells which are embedded into root galls. At present only little information is available about the solute transfer mechanisms of the plants to supply the induced galls and giant cells and consequently the nematodes. In the present work we could show by phloem-loading experiments that giant cells in the roots of Arabidopsis thaliana are not symplasmically connected to the phloem elements, thus differing considerably form the comparable plant-nematode interaction of Arabidopsis and Heterodera schachtii. Consequently the gene expression of the sucrose transporter AtSUC4 (AtSUT4) was studied during nematode development, and its functionality was shown using RNAi gene silencing lines.
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