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Table 3 The meanings of the parameters in present study

From: Effect of temperature and water potential on the germination of seeds from three different populations of Bidens pilosa as a potential Cd hyperaccumulator

Parameter

Description

Tb

the base temperature

To

the optimal temperature

Tc

the ceiling temperature

tg

the time to a given specific germination percentage g

θT(50)

the thermal time for 50% of seeds to germinate

Tc(50)

the ceiling temperature for 50% of seeds to germinate

θT

the thermal time constant

σθT

the standard deviation of log θT requirements

σTc

the standard deviation of Tc

θH

the hydrotime constant

ψb(50)

the median base water potential

σψb

the standard deviation of ψb(50)

θHT

the hydrothermal time constant