io6 



JIRICATSKY 



% 



WSD 



20 



10 







% 



WSD 



20 



o 



/ o 



o / 

 ° /q o 



o / 



PP o 



o 



/{? 



c? 



10 



Fig. 3 



20 



/o 



20 



Fig. 4 



Figs. 3 and 4. Verification of the water saturation deficit estimation by the disc method 

 and extrapolation in old (Fig. 3) and young (Fig. 4) leaves. Abscissa: WSD values 

 obtained by the disc method; ordinate: WSD values derived from wilting of 

 saturated tissue (see the text). 



