
TY  - JOUR
A1  - King, RW 
T1  - Photoperiodic Time Measurement and Effects of Temperature on Flowering in <I>Chenopodium rubrum</I> L
JF  - Functional Plant Biology
JO  - Functional Plant Biol.
Y1  - 1979
VL  - 6
IS  - 3
SP  - 417
EP  - 422
KW  - 
UR  - https://doi.org/10.1071/PP9790417 
N2  - The critical dark period length (c. 8 h darkness) required for induction of flowering of C. rubrum is insensitive to temperature (Q10 c. 1.0) over the temperature range 10-25&#176;C. However, the period of a rhythm controlling floral induction is shown to be temperature sensitive (Q10 c. 1.4) over the temperature range 9-22&#176;C. The discrepancy in temperature dependence of these two parameters of photoperiodic time-measurement could reflect differences in their rates of adjustment after a temperature shift. By contrast, at least two other species (Pharbitis nil and Hyoscyamus niger) show marked temperature sensitivity of their critical daylength. Thus, there may be more than one time- keeper in the photoperiodic control of flowering. 
ER  -

