Plants provide protection from fungal disease by producing |
|||||||
a) |
Protoxins |
b) |
Prolectins |
c) |
Phytoalexins |
d) |
All of these |
Plants provide protection from fungal disease by producing |
|||||||
a) |
Protoxins |
b) |
Prolectins |
c) |
Phytoalexins |
d) |
All of these |
(c)
Phytoalexins are phenolic compounds, which are not present in healthy plants but are produced upon stimulation of a plant by pathogen or by a mechanical or chemical injury. These are fungitoxic substances and inhibit the growth of microorganisms pathogenic to plants.
Who crystallised and isolated viruses for the first time? |
|||||||
a) |
WM Stanley |
b) |
FC Bawden |
c) |
KM Smith |
d) |
DJ lvanowsky |
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