Relationship between plant virus concentration and infectivity: a 'growth curve' model.

Abstract:

:A logistic ('growth curve') model is formulated and applied to the relationship between numbers of infections (local lesions) produced by a virus on inoculated plants and the concentration of the virus in the inoculum. This model has the advantages of being simple, data-based and therefore not founded on limiting postulates, and of being applicable to a wide range of infection-dilution series, including those obtained from multicomponent viruses. Here, it is applied to common tobacco mosaic virus. Examples of infection-dilution series taken from the literature are fitted more closely and more objectively than they were fitted by the original authors. A limiting number for lesions is estimated by minimizing chi 2 values for differences between observed lesion numbers and those calculated from the logistic equation. The complete fitting procedure can be programmed on a hand-held calculator.

journal_name

J Virol Methods

authors

Gokhale DV,Bald JG

doi

10.1016/0166-0934(87)90084-x

subject

Has Abstract

pub_date

1987-12-01 00:00:00

pages

225-32

issue

4

eissn

0166-0934

issn

1879-0984

pii

0166-0934(87)90084-X

journal_volume

18

pub_type

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