Abstract
The virus replication capacity (determined by density gradient centrifugation and spectrophotometric virus assay) and severity of symptoms were compared in ten cucumber(Cucumis sativus L.) cultivars infected by cucumber virus 4. Except the expected resistant susceptible and symptomless virus carrier plants a new paradoxial group of cultivars was found. This group is characterized by low virus reproduction rate but simultaneously associated with severe symptoms and is responsible for difficulties in the virus transmission and purification. It is concluded that the critical evaluation of the resistance against viruses of TMV-group must include symptomatic and quantitative virus assays, as there need not be a direct relationship between virus symptoms and the virus increase.
Abstract
V deseti kultivarech okurky(Gucumis sativus L.) infikovanych virem zelenoskvrnité mozaiky okurky (CV 4, Knight) se porovnával maximálni obsah viru (stanoveny spektrofotometricky pro centrifugaci v huatotnim gradientu) s intenzitou priznaků. Vedle rezistentnich, náchylnych kultivarů a bezpfiznakych nosioů viru byla nalezena nova paradoxni skupina, vyznacujici se nizkou reprodukci viru a velmi silnymi pfiznaky. V této skupině lze obtizně pfenáSet i cistit virus. Z pokusů vyplyvá, ze ke kritickému posouzeni rezistenoe vůěi virům ze skupiny viru tabákové mozaiky je nutné doplnit sledováni priznaků kvantitativni analyzou obsahu viru, protoze mezi pfiznaky a reprodukci viru v roatlině nemusi byt pfimy vztah.
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Čech, M., Branišová, H. Nonrelatedness between symptoms and cucumber virus 4 content in different cucumber cultivars. Biol Plant 18, 58–62 (1976). https://doi.org/10.1007/BF02922336
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DOI: https://doi.org/10.1007/BF02922336