Words similar to plant-parasitic
Example sentences for: plant-parasitic
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We have demonstrated that a high-throughput bioinformatics approach based on EST sequences is an efficient and effective way to identify possible HGT candidates in plant-parasitic nematodes.
Sixty-four ESTs had significant homology to the putative fatty-acid-binding protein Sec-2, confirming the abundant expression of this gene reported in L2 cDNA libraries from M. incognita [ 29 ] and the cyst nematodes G. rostochiensis and G. pallida cDNA [ 30 ] . Sec-2 is secreted by plant-parasitic nematodes at relatively high levels [ 34 ] . Several abundantly expressed genes are also horizontal gene transfer candidates (see below).
The results from this second filter were examined and any sequence with a significant match to a metazoan other than a closely related plant-parasitic nematode was removed from further analysis.
The literature reports seven genes postulated to have been horizontally acquired by M. incognita, M. hapla or M. javanica during evolution of plant-parasitic nematodes [ 17 18 19 20 21 ] ; our search algorithm revealed six of these genes.
The pectate lyase gene (MI00592) was identified in G. rostochiensis and H. glycines [ 17 ] and the exo-polygalacturonase (MI00252) was identified in our M. incognita data [ 21 22 ] . Because of the obvious role of nematode genes that allow endogenous production of cell-wall degrading enzymes in attacking a plant host, it has been hypothesized that their acquisition by HGT may have been key steps in the evolution of plant-parasitic nematodes from ancestral free-living forms [ 3 ] . In that model, an intermediate, symbiotic association of a soil-dwelling (but free-living) nematode with a soil bacterium possessing these enzymes is postulated before the HGT event.
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