Tilletia indica - The Food and Environment Research Agency - Defra

Sample d
(✔ boxes)
T. horrida
T. walkeri
T. indica
Max Size (diam., µm) a Mean size (diam., µm) a
36–45–50+ 24–28 30–31 35–41 Pale yellow to
mostly light
or dark
chestnut-
brown (to
semi-opaque)
Colour b Spines (ornamentation) in surface view b and median profile b,c
Pale yellow to
mostly
reddishbrown
(never
opaque)
Pale orange,
but mostly
dark reddish-
brown to
opaque black
Echinulate; polygonal
scales in surface view;
occasionally
cerebriform ridges or
rarely clumps.
Sharpely pointed,
becoming truncate,
occasionally curved
Coarse; broad,
incompletely cerebriform
ridges (to coralloid), or
thick clumps.
Conical to truncate (gaps
between spines obvious
in profile after
bleaching) c
Dense; echinulate or
closely spaced narrow
ridges (finely cerebriform)
Sharpely pointed to
truncate, occasionally
curved (few or no gaps
between spines after
bleaching) c
Table 3.2. Scheme for morphologically distinguishing teliospores of Tilletia indica, T. walkeri and T. horrida detected in size-selective sieving wash
tests that use 20 µm and 53 µm sieves. a Section II, Table 2.2; b Section II, Table 2.2 and Figures 2.2–2.4; c Section II, Figure 2.5;
d Refer to Diagnostic Scheme in Section II (Figure 2.1) and Decision scheme (Figure 3.8).
, character conforms to species