Mindblown: a blog about philosophy.
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Dilution end-point
The stage of a serial dilution of cells or virus preparations at which growth or infection from a standard sample of the suspension no longer occurs.
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Differential host
A host that elicits discerning responses between race-specific isolates of a pathogen, such as rust.
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Dieback
The process of shoot necrosis, which commences at the uppermost point or apex and gradually advances downwards towards the primary stem, is a phenomenon that warrants our attention.
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Dependent transmission
The act of transmitting a virus through a vector is only possible when a second virus, known as the helper virus, is present. In cases where the virus is incapable of being transmitted independently, it is classified as the dependent virus.
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Cytokinin
Chemicals which, regardless of their other activities, promote cell division in cells of various plant origins usually when grown as callus in aseptic culture. For the most part endogenous cytokinins are all N6 substituted adenine derivatives, for example zeatin from Zea mays and N6 (yy-dimethlallyl amino) purine from cultures of Corynebacterium fascians. A number of…
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Cryptogram
A descriptive code summarizing some of the main properties of a virus.
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Cross absorption test
A test of serological affinities of two antigens, e.g. viruses. This involves testing dilutions of an antiserum against the antigen used in its preparation after previously incubating the antiserum with an excess of dissimilar antigen.
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Blue stain
A deep-seated discoloration of wood resulting from fungus attack; predominantly bluish but sometimes having a grey or brown tint; confined almost exclusively to sapwood.
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Blight
In the 17th century, a term was coined to refer to any elusive malevolent force, but later it was used to describe a condition that afflicts plants, whose origin is not yet fully understood and believed to be caused by the atmosphere. This condition is commonly associated with the browning and discoloration of leaves and…
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Biotrophic
The state of being entirely reliant on another living being for sustenance is a characteristic observed in certain organisms, such as mycorrhizal fungi and obligate parasites. This term is commonly referred to as “dependency.”
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