
TY  - JOUR
A1  - Addae, PC 
A1  - Pearson, CJ 
T1  - Thermal requirement for germination and seedling growth of wheat
JF  - Australian Journal of Agricultural Research
JO  - Aust. J.  Agric. Res.
Y1  - 1992
VL  - 43
IS  - 3
SP  - 585
EP  - 594
KW  - temperature;Triticum aestivum;thermal time;imbibition;coleoptile;roots;emergence
UR  - https://doi.org/10.1071/AR9920585 
N2  - Two cultivars of wheat, Hartog (a spring type) and Rosella (winter) were sown at 2, 5, 8, 10, 15, 20 and 25¦C on porous sand medium held at constant soil matric potential. The thermal times required for germination, onset of coleoptile elongation and emergence were similar, 27, 35 and 130¦C days respectively, for the two cultivars over the temperature range of 2-25¦C. By extrapolation, the base temperature for germination and coleoptile elongation was 1¦C and for emergence 0.4¦C. The rate of seedling elongation and emergence of both cultivars increased linearly with temperature between 5 and 25¦C. Final percentage germination, final coleoptile length and total emergence of both cultivars were independent of temperature between 8 and 25¦C but were smaller at 2¦C. Differences between the two cultivars were confined to response to low temperature (2OC) during germination and to high temperature (25¦C) during coleoptile elongation. 
ER  -

