312 
Jour nal of Agricultural Research 
Vol. XXIX, No. 6 
hours of daylight. Both plants show not so obviously dissimilar show very 
a rather closer agreement with radiation different reactions to variations in 
than with air temperature. radiation and temperature. Such bc- 
-Eia. l.—Hourly rate of growth of green and albino maize seedlings compared with air temperature and 
solar radiation 
It seems rather remarkable that these 
•sister maize plants differing so greatly 
in a major physiological characteristic 
should have such similar growth rates 
when in many other instances plants 
havior shows that the response of the 
plant to air temperature and radiation 
is controlled by inherent factors not 
associated with the production of chlo¬ 
rophyll and photosynthesis. 
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