Words similar to plant-parasitic
Example sentences for: plant-parasitic
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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 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.
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.
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.
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.
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