EurekaMag.com logo
+ Site Statistics
References:
53,869,633
Abstracts:
29,686,251
+ Search Articles
+ Subscribe to Site Feeds
EurekaMag Most Shared ContentMost Shared
EurekaMag PDF Full Text ContentPDF Full Text
+ PDF Full Text
Request PDF Full TextRequest PDF Full Text
+ Follow Us
Follow on FacebookFollow on Facebook
Follow on TwitterFollow on Twitter
Follow on LinkedInFollow on LinkedIn

+ Translate

Investigations on the nature of a graft-transmissible agent in poinsettia



Investigations on the nature of a graft-transmissible agent in poinsettia



Canadian Journal of Botany 71(8): 1097-1101



The free-branching poinsettia (Euphorbia pulcherrima) cultivar Annette Hegg Brilliant Diamond contains a free-branching agent that is graft-transmissible to the restricted-branching cultivar Eckespoint C-1 Red. Transmission electron microscopy failed to reveal evidence of bacteria, fungi, or mycoplasma-like organisms in either 'Brilliant Diamond' or 'C-1 Red' plants. Treatment of both cultivars with tetracycline-hydrochloride produced no differences in branching pattern or leaf morphology in either cultivar, indicating that the agent may not be a mycoplasma-like organism. Scions of a poinsettia mosaic virus indicator species (Euphorbia cyathophora) grafted onto 'Brilliant Diamond' and 'C-1 Red' stocks exhibited the mottling symptoms characteristic of poinsettia mosaic virus, while self-grafted E. cyathophora scions showed no mottling, indicating that poinsettia mosaic virus was not die agent. The agent was not transmitted by pin prick, carborundum, or dodder (Cuscuta sp.), and ribaviran did not eliminate expression of the branching agent from 'Brilliant Diamond' plants. No differences in double-stranded RNA banding patterns were found between extracts of free- and restricted-branching poinsettias by polyacrylamide gel electrophoresis. The double-stranded RNA was attributed to poinsettia mosaic virus and other unknown RNA viruses. Attempts to detect a specific DNA associated with free-branching were inconclusive.

(PDF emailed within 0-6 h: $19.90)

Accession: 002417326

Download citation: RISBibTeXText

DOI: 10.1139/b93-128



Related references

Further characterization of the graft transmissible free branching agent in poinsettia. Hortscience 23(3 SECT 2): 802, 1988

Vegetative and reproductive characteristics of poinsettia altered by a graft-transmissible agent. Journal of the American Society for Horticultural Science 116(2): 307-311, 1991

In vivo characterization of a graft-transmissible, free-branching agent in poinsettia. Journal of the American Society for Horticultural Science 117(6): 972-975, 1992

A graft transmissible disease of poinsettia in Sicily. Tecnica Agricola 33(1/2): 81-91, 1981

A graft-transmissible disease of poinsettia found in Sicily. Tecnica Agricola, Italy 33(1/2): 81-91, 1981

Correlation of poinsettia graft union development with transmission of the free-branching agent. Hortscience 28(5): 214, 1993

The possible nature of the transmissible agent of scrapie. Veterinary Record 80(1): 2-9, 1967

Bud union disorder in navel associated with a graft transmissible agent. Phytopathology 92(6 Supplement): S51, June, 2002

A graft transmissible agent from the non-variegated Pittosporum tobira (Thunb.) Ait. Acta botanica Croatica: 2 25-28, 1973

Transmissible mink encephalopathy: pathogenesis and nature of the aetiological agent. Journal of Clinical Pathology. Supplement 6: 102-109, 1972

A newly recognized disease of Chrysanthemum caused by a graft-transmissible agent. Phytopathology. 59: 8, 1024, 1969

The nature and physical characteristics of a transmissible agent from human sarcoid tissue. Annals of the New York Academy of Sciences 278: 233-248, 1976

Graft-transmissible agent causes bark necrosis and stem pitting in plum trees. California Agriculture 56(3): 108-111, 2002

A graft-transmissible agent associated with bark- and wood-grooving disease of peach and nectarine. Phytopathology 66(6): 729-730, 1976

Segregation of a viroid complex from a graft transmissible dwarfing agent source for grapefruit trees. Annals of Applied Biology 115(3): 515-520, 1989