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narcissus late season yellows virus and vallota speciosa virus found infecting domestic and wild populations of narcissus species in australia.isolates of narcissus late season yellows virus (nlsyv) were identified from domestic and wild narcissus populations at incidences of 66 and 49%, respectively. nlsyv was also detected in one plant of clivea miniata. comparisons of nucleotide and amino acid sequences of the coat protein genes of nlsyv isolates showed that they formed three distinct phylogenetic groups, including one not seen before. vallota speciosa virus was detected in one domestic population of narcissus sp. where it infected ...201020480194
alkaloids from cyrtanthus elatus.the alcoholic extract of the fresh bulbs of cyrtanthus elatus yielded zephyranthine (1) and 1,2-o-diacetylzephyranthine (2), together with three other known alkaloids. complete assignment of 1h and 13c nmr spectra of compounds 1 and 2 was done by employment of two-dimensional nmr techniques.200111395276
complete genome sequences of seven carlavirus and potyvirus isolates from narcissus and hippeastrum plants in australia, and proposals to clarify their naming.complete genome sequences were obtained from two isolates of the carlavirus nerine latent virus from hippeastrum and narcissus plants, two isolates of the potyvirus hippeastrum mosaic virus from a hippeastrum plant, and one isolate each of the potyviruses narcissus degeneration virus, narcissus yellow stripe virus and vallota speciosa virus from narcissus plants. proposals are made to clarify the current confusion surrounding the naming of some of these viruses.201222569885
the first complete genome sequence of iris severe mosaic virus.the first complete genome sequence of ismv was determined by deep sequencing of a small rna library constructed from ismv-infected samples and rapid amplification of cdna ends (race) pcr. the ismv genome consists of 10,403 nucleotides excluding the poly(a) tail and contains a large open reading frame encoding a polyprotein of 3316 amino acids. putative proteolytic cleavage sites were identified by blast analysis. the ismv polyprotein showed highest amino acid sequence identity to that encoded by ...201626729478
evolutionary rates and genetic diversities of mixed potyviruses in narcissus.there is no attempt to evaluate evolutionary rates, timescales and diversities of viruses collected from mixedly infected hosts in nature. plants of the genus narcissus are a monocotyledon and are susceptible to several viruses. in this study, narcissus plants (narcissus tazetta var. chinensis) showing mosaic or striping leaves were collected in japan, and these were investigated for potyvirus infections using potyvirus-specific primers. individual narcissus plants were found frequently to be mi ...201627590715
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