
TY  - JOUR
A1  - Ellison, PJ 
A1  - Cullis, BR 
A1  - Bambach, RW 
A1  - Kable, PF 
T1  - The effect of temperature on in vitro germination and germ tube growth of urediniospores of <I>Tranzschelia discolor</I>
JF  - Australian Journal of Agricultural Research
JO  - Aust. J.  Agric. Res.
Y1  - 1990
VL  - 41
IS  - 3
SP  - 479
EP  - 488
KW  - 
UR  - https://doi.org/10.1071/AR9900479 
N2  - The effect of temperature on in vitro germination and germ tube growth of urediniospores of Tranzschelia discolor was studied over time under constant temperature conditions. Studies were carried out on 1% water agar in the dark at 3¦C, 5¦C, 8¦C, 10¦C, 15¦C, 20¦C, 25¦C, 28¦C, 30¦C and 32¦C. Germination was observed at all temperatures between 5 and 30'C, and occurred rapidly over most of this range. At 2 h, germination exceeded 80% at temperatures between 10 and 28¦C, and this level was reached at 3 h at 8¦C. Germination at 5 and 30¦C was much reduced and at 7 h reached only 44% and 38% respectively. Germ tube growth occurred most vigorously at 15 and 20¦C, reaching lengths in excess of 500 8m at 9 h. The optimum range was narrower than that for germination, and growth was reduced or poor at 8¦C, 10¦C, 25¦C and 28¦C, which were favourable temperatures for germination. Average germ tube lengths at 9 h at these temperatures were 55, 245, 273 and 62 8m, respectively. Three-dimensional models were derived relating germination and germ tube growth to time and temperature. 
ER  -

