Cyst nematodes are plant-parasitic roundworms that are of significance in many cropping systems around the world. Cyst nematode infection is facilitated by effector proteins secreted from the nematode into the plant host. The cDNAs of the 25A01-like effector family are novel sequences that were isolated from the oesophageal gland cells of the soybean cyst nematode (Heterodera glycines). To aid ...

1. Cyst walls of the beet cyst-nematode (Heterodera schachtii Schmidt) were obtained by sieving a suspension of crushed cysts; about 15mg of dried cyst walls was obtained from 1000 cysts. 2. The cyst walls contained 68% protein calculated from nitrogen content. Glutamic acid, glycine, proline and hydroxyproline made up about 54% by weight of the amino acids obtained on acid hydrolysis. 3. Minor...

Cyst nematodes are sedentary plant parasites that cause dramatic cellular changes in the plant root to form feeding cells, so-called syncytia. 10A06 is a cyst nematode secretory protein that is most likely secreted as an effector into the developing syncytia during early plant parasitism. A homolog of the uncharacterized soybean cyst nematode (Heterodera glycines), 10A06 gene was cloned from th...

The goal of this study was to identify bacteria involved in soil suppressiveness against the plant-parasitic nematode Heterodera schachtii. Since H. schachtii cysts isolated from the suppressive soil can transfer this beneficial property to nonsuppressive soils, analysis of the cyst-associated microorganisms should lead to the identification of the causal organisms. Our experimental approach wa...

the entomopathogenic fungus, verticillium epiphytum was isolated from the infected specimens of thrips tabaci collected in mashhad in april 2011. the fungus has been previously reported from rusts and sugar beet cyst nematode heterodera schachtii. this is the first record of v. epiphytum on t. tabaci in the world.

Because rapeseed, especially canola, has the potential to be grown in rotation with sugarbeet in the north-central region of the United States, this study was initiated to assess its susceptibility to infection by Heterodera schachtii and to develop a screening method for Brassica germplasm. Existing methodology was adapted for growing Brassica juncea, B. napus, B. rapa, Brassica hybrids, and s...

Plant-parasitic cyst nematodes synthesize and secrete effector proteins that are essential for parasitism. One such protein is the 10A07 effector from the sugar beet cyst nematode, Heterodera schachtii, which is exclusively expressed in the nematode dorsal gland cell during all nematode parasitic stages. Overexpression of H. schachtii 10A07 in Arabidopsis thaliana produced a hypersusceptible ph...

Vulval cones of four closely related Heterodera species - H. glycines (races 1-5), H. lespedezae, H. schachtii, and H. trifolii - were examined using scanning electron microscopy. Numbers of dorsal and ventral radial ridges, total radial ridges, perineal ridges, and preanal ridges were useful in differentiating the five races of H. glycines and the other three species. Most of the populations d...

In central Washington, Heterodera schachtii Schmidt (the sugarbeet cyst nematode) is associated with sugarbeets (Beta vulgaris L.) growing in fine-textured soils, and Meloidogyne hapla Chitwood (the nor thern root-knot nematode) is associated with sugarbeets growing in coarse-textured soils. T h e opt imum soil temperature for reproduct ion on sugarbeets is between 21 and 30 C for H. schachtii ...