Infection of tobacco and some Chenopodium species by the cucumber virus 4 (and 3) and by its nucleic acid
1962; Elsevier BV; Volume: 16; Issue: 2 Linguagem: Inglês
10.1016/0042-6822(62)90285-4
ISSN1096-0341
AutoresJ. Brčák, Marie Ulrychová, M. Čech,
Tópico(s)Plant Disease Resistance and Genetics
ResumoCucumber virus 4 (CV4) was mechanically transmitted to Nicotiana tabacum var. Samsun and to N. tabacum var. Xanthi-nc and induced identical chlorotic local lesions on both; no systemic infection occurred. The transmission succeeded by inoculation with nucleic acid (CV4-NA), by the purified whole virus, or by crude sap from infected cucumber plants. After passage through local lesions on tobacco a change of CV4 symptoms occurred. All attempts to infect Nicotiana glutinosa failed. CV4 produced primary chlorotic lesions on Chenopodium glaucum; C. murale mechanically inoculated by CV3 and CV4 showed a marked systemic infection. The incubation period of CV3 and CV4 in the new hosts was many times longer than that of tobacco mosaic virus (TMV). No differences were observed between plants infected by CV4-NA or by the whole virus. In chlorotic lesions induced by CV4-NA typical rod-shaped particles were found. Leaves of N. tabacum var. Samsun infected by CV4 were not protected against infection by TMV. Primary infection of N. tabacum var. Xanthi-nc by CV4 did not prevent the formation of TMV necrotic lesions, but their development was slightly retarded. No protective effect by CV3 or CV4 systemic infection against TMV was observed in C. murale in as much as TMV necrotic lesions developed on leaves systemically infected by CV3 or CV4. The indicated biological behavior of CV3 and CV4 on the new hosts gives evidence that CV3 and CV4 are not strains of TMV.
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