Use
Mosaic is a leaf symptom in which numerous small areas
of discoloration stand-out against a background of a
different tint. It leads to a clearly defined boundary,
delineated by veins, and a pattern of green angular areas
against a predominantly yellow background.
Alternatively, the areas bounded by the veins may be
chlorotic giving a yellow-on-green mosaic. If discrete
areas of color later coalesce, a mottle symptom may
result.
Most probable number method for estimation of
VAM population
Estimation of VAM (vesicular arbuscular mycorrhizae)
propagule populations in soils can be carried out by two
methods: the most probable number (MPN) method,
and the mycorrhizal soil fertility (MSF) method. These
methods evaluate the number of viable propagules
(number of micro-organisms per gram of soil) based on
the proportion of plants found to be mycorrhizal after
growth in a series of soil dilutions. These methods
eliminate single-spore counts which are very time
consuming and which require several weeks
of plant growth before evaluation of the plant root
colonization.
Mother plant
A plant from which progeny is produced either by seed or
by vegetative propagation is called a mother plant.