Host Parasite Relationships of the Clover Cyst Nematode Heterodera Trifolii Gof
Host Parasite Relationships of the Clover Cyst Nematode Heterodera Trifolii Gof
Reinhold Mankau
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The tubes were usually 50 to 70 microns long and about 2 microns wide through- out their length, and had circular cross sections. They were rarely if ever straight, but curved gently and sometimes were distinctly coiled. Generally a syncytium contained several tubes distributed so as to suggest that they had formed successively at the stylet, became dis- lodged, and had been carried away by movement of the cytoplasm. 1960] HOST-PARASITE RELATIONSHIPS OF THE CLOVER CYST NEMATODE 25 X Longitudina...l section of a Ladino clover root, processed 37 days after entry of the nematode, showing the anterior end of a mature female, above center, and part of a syncytium with sparse cytoplasm below. Two tubular filaments (arrow) lay in the syncytium near the head of the nematode, both of them having one end in contact with the cell wall through which the nematode fed. The distal end of the longer tube was in contact with a faintly visible nucleus. X720. (Fig. 10) These tubes were observed as early as 6 days after a nematode had entered the root and at almost all stages after that.
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