Killing of Plant Tissue by Low Temperature 



231 



Table 31a. Showing Relative Resistance to Low Tempera- 

 tures OF Apple Roots Kept in Dormant Condition 

 as Compared with Those in a Grow- 

 ing Condition. 



Kind of Root 



Crown cut diameter i% to 



>4 in 



Lower cut diameter J^ to 



1^6 in _ 



Crown cut diameter fe to 



>4 in ,.. 



Lower cut 14 to i\ in. in 



diameter 



Crown cut diameter i\ to 



Min 



Lower cut diameter 34 to 

 3 

 10 



in. 



Crown cut diameter 1^6 to 



k in 



Lower cut diameter 34 to 

 A in 



Crown cut diameter i^g to 

 Kin 



Lower cut diameter 34 to 

 A in 



Outside 



No injury. 



No injury. 



No injury. 



No injury. 



No injury. 



No injury. 



No injury. 



One root 

 brown; other 

 not injured. 



All browned. . . 



All browned. . . 



Greenhouse 



No injury. . . . 



No injury. . . . 



No injury. . . . 



No injury. . . . 



One root very 

 brown; other 

 slightly. 



Both roots 

 brown in cor- 

 tex and cam- 

 bium. 



Stored January 8, 1913. 



