Nucleic acid extracts from citrons (Citrus medica cv. Etrog) displaying mild and moderate
symptoms associated with the exocortis disease were analysed by sequential and denaturing …

… and cellulose columns characteristic of a double-stranded (ds) structure displayed no
resistance to RNase or formaldehyde (Semancik and Weathers, 1970a). The presence of bot,ha …

Recovery of highly purified citrus cachexia viroid (CCaV) was accomplished by serial elution
following CF-11 cellulose chromatography of a 2 m-LiCl-soluble nucleic acid preparation. …

… Infectious preparations were obtained as previously reported by Semancik and Weathers",
and involved extraction of fresh tissue in phenol. High molecular weight single stranded …

Variants of avocado sunblotch viroid (ASBVd) of between 247 and 250 nucleotides in length
have been recovered from diseased avocado tissues. The sunblotch syndrome covers a …

Analysis by polyacrylamide gel electrophoresis of nucleic acid preparations, obtained from
several varieties of grapevine by a procedure designed to isolate and purify viroids, revealed …

Citrus viroids, CVd-la, CVd-IIa, and CVd-IIIb, representative of three distinct Citrus Viroid
Groups, resulted in a statistically significant reduction of 20-50% in tree size of Valencia orange, …

Evidence of post-transcriptional gene silencing (PTGS) in avocado infected by Avocado
sunblotch viroid (ASBVd), the type species of family Avsunviroidae, was suggested by detection …

Purification of the pathogenic RNA (viroid) from exocortis disease has been accomplished.
Composition analysis indicates the absence of any DNA or protein and a molar nucleotide …

Citrus viroid (CVd) group II is comprised of hop stunt viroid (HSVd)-related variants of 295 to
302 nucleotides. Included in this group are the cachexia-inducing agents citrus cachexia …