( 226 ) 
-4jo_11.4 
A t ~~4A 
2 .( 
^21 2?!? 05 ^ 
A 8.2 “ 2,5 . 4 10 
Hence the coefficient is here on the average 2.5. If we consider 
the course at every temperature, we find that up to 30° a very 
distinct rise is observable; I attribute this partly to the increase of 
respiration with the advance of the period of germination of the 
plant. This increase was already observed by Rischavi *); I myself 
found at 20° for instance after 4 days’ germination 28 mg., after 5 
days in the same plants 36 mg. 
At 35° the 'Curve is very irregular, while at a higher temperature 
the logarithmic decline again shows itself. 
In this case also the general aspect is the same as that presented 
by Lupinus and Pisum. The difference between the three plants is 
in the temperature at which the rise, the oscillations and the decline 
occur. 
It will be seen that in this respect the three plants form a series. 
1 imagine that this different behaviour is caused by, or is at least 
closely connected with the reserve food which the plant has at its 
disposal. There is found for instance in: *) 
Lupinus 
Pisum 
Triticum 
as reserve food 
protein 37 0/ o 
starch 54°/# 
protein 22% 
starch 74% 
protein 12% 
If follows from these figures that the temperature at whic e 
harmful effect arises, is higher when the starch content is 
and lower in proportion as the protein content is higher. Pro 
there is here an indication that the course of respiration depen s^ ^ 
the presence of proteolytic or diastatic enzymes; the falling-o 
J ) L. Rischavi, Landwirtsch. Versuchsstationen, Bd. 
s ) These data have been taken from Harz, Land 1 
