Previous View
APSnet Home
Phytopathology Home


Mycoplasmalike Bodies Found in Phloem of Black Locust Affected with Witches’-Broom. Carl E. Seliskar, Principal Plant Pathologist, Northeastern Forest Experiment Station, Forest Service, USDA, Delaware, Ohio 43015; Charles L. Wilson(2), and Carol E. Bourne(3). (2)Plant Pathologist, Plant Science Division, ARS, USDA, Delaware, Ohio; (3)Biological Laboratory Technician, Northeastern Forest Experiment Station, Delaware, Ohio. Phytopathology 63:30-34. Accepted for publication 12 July 1972. DOI: 10.1094/Phyto-63-30.

Pleomorphic bodies resembling mycoplasmas were found in the phloem tissues of black locust trees (Robinia pseudoacacia) affected with witches’-broom. These bodies ranged in size from 90 to 1,000 nm. They contained ribosomelike bodies and strands typical of mycoplasma DNA. They were delimited by a trilaminar membrane. No mycoplasmalike bodies were observed in the phloem tissues of healthy black locust.

Additional keywords: tree virus, yellows disease.