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Molecular cloning of Indian tomato leaf curl virus genome following a simple method of concentrating the supercoiled replicative form of viral DNA.

Abstract：

:DNA-A and DNA-B components of the genome of a whitefly transmitted virus causing yellowing and leaf curl in tomato (ITLCV) were cloned following a simple procedure for isolation of the double stranded replicative form of viral DNA from infected tomato plants. The method is based on extraction of total DNA from infected plants followed by concentration of the double stranded replicative form of viral DNA by an alkaline denaturation procedure identical to that used for isolation of plasmid DNA from Escherichia coli. The attempted cloning of DNA showed that 95% of the transformants contained plasmids with an insert of either DNA-A (2.75 kb) or DNA-B (2.55 kb). Cloned DNA-A and DNA-B when used as probes could detect DNA-A/DNA-B in total nucleic acid obtained from fresh diseased tissue. Both DNA-A and DNA-B are needed for infection and they have a common region of 166 bases with about 94% nucleotide sequence homology, a characteristic of all bipartite geminiviruses. Comparison of the amino acid sequence of the putative coat protein product of ITLCV with some other mono- and bipartite geminiviruses revealed a maximum of 86% homology with Indian cassava mosaic virus.

journal_name

J Virol Methods

journal_title

Journal of virological methods

authors

Srivastava KM,Hallan V,Raizada RK,Chandra G,Singh BP,Sane PV

doi

10.1016/0166-0934(94)00122-w

subject

Has Abstract

pub_date

1995-02-01 00:00:00

pages

297-304

issue

2-3

eissn

0166-0934

issn

1879-0984

pii

0166-0934(94)00122-W

journal_volume

51

pub_type

杂志文章

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