Summary
Pear vein yellows affectedPyrus communis L. leaves were examined with light and electron microscopes. Virus-like flexuous rods were observed in leaf dip preparations. Some rods were 20 nm in diameter and 700–800 nm long. Other longer rods of like diameter apparently resulted from end to end aggregation. In cells, the rods occurred as aggregates or in inclusion bodies. Vein-yellows-affected leaf mesophyll cells had fewer and smaller chloroplasts than healthy leaf mesophyll cells. Neither the flexuous rods nor the inclusion bodies were found in healthy pear leaves.
This is a preview of subscription content, log in via an institution to check access.
Similar content being viewed by others
References
Brandes, J., andR. Bercks: Gross morphology and aerology as a basis for classification of elongated plant viruses. Advanc. Virus Res.11, 1–24 (1965).
Canova, A. (Compiler): Symptoms of various virus and virus-like disorders of fruittreesin Italy. 47 plates. Observed by the: Institute of Plant Pathology of Bologna Bologna. June (1962).
Hibino, H., andH. Schneider: Mycoplasmalike bodies in sieve tubes of pear trees affected with pear decline. Phytopathology60, 499–501 (1970).
Posnette, A. F.: Virus diseases of apples and pears, p. 93. Commonwealth Agr. Bureaux, England (1963).
Schneider, H.: Graft transmission and host range of the pear decline causal agent. Phytopathology60, 204–207 (1970).
Soma, K., and H.Schneider: Developmental anatomy of major lateral leaf veins of healthy and pear decline diseased pear trees. Hilgardia. In press (1970).
Author information
Authors and Affiliations
Additional information
Research completed while on leave from the Institute for Plant Virus Research, Chiba, Japan.
Rights and permissions
About this article
Cite this article
Hibino, H., Schneider, H. Virus-like flexuous rods associated with pear vein yellows. Archiv f Virusforschung 33, 347–355 (1971). https://doi.org/10.1007/BF01254691
Received:
Issue Date:
DOI: https://doi.org/10.1007/BF01254691