38 



TRANSLOCATION IN PLANTS 



Table 6. — Comparative Effects on the Growth of Defoliated Shoots 

 OF Cutting Phloem Alone, Xylem Alone, and Both Phloem 



AND Xylem 



Plant and date 



Philadelphus 



June 4 to 9, 1925 



Philadelphus 



June 9 to 11, 1925 



Philadelphus 



June 10 to 12, 1925 



Ligustrum 



June 20 to 25, 1925 



Rhus 



Aug. 19 to 27, 1924 



Rhus 



June 23 to 27, 1925 



Rhus 



June 30 to July 6, 

 1925 



Treatment 



Check 



Phloem cut 



Xylem cut 



Phloem and xylem cut 



Check 



Phloem cut 



Xylem cut 



Phloem and xylem cut 



Check 



Phloem cut 



Xylem cut 



Phloem and xylem cut 



Check 



Phloem cut 



Xylem cut 



Check* 



Phloem cut 



Xylem cut 



Phloem and xylem cut 



Check 



Phloem cut - . . 



Xylem cut 



Check 



Phloem cut 



Xylem cut 



No. 

 stems 



10 



10 



18 



Av. growth, mm. 



1st 

 period 



1 day 

 4.9 

 2.7 

 3.3 

 4.4 



1 day 



12.9 



4.6 



9.0 



5.6 



1 day 

 3.4 

 2.0 



4.8 

 2.6 



2 days 

 6.7 

 1.6 

 3.3 



1 day 

 3.0 

 1.8 

 4.2 

 3.8 



1 day 

 3.4 

 1.0 

 4.3 



1 day 

 2.2 

 1.3 

 2.2 



2d 

 period 



2 days 

 14.0 



1.2 

 6.0 

 2.6 



1 day 

 8.3 

 1.2 

 5.6 

 1.4 



1 day 

 9.9 

 3.0 

 9.9 

 2.2 



3 days 

 9.3 

 0.5 

 3.0 



1 day 

 2.8 

 0.8 

 6.0 

 4.7 



1 day 

 6.8 

 1.8 

 4.9 



1 day 

 5.4 

 1.3 

 5.5 



3d period 



2 days 



26.0 



2.6 



6.8 

 1.4 



1 day 



10.0 



1.1 



5.9 



1.7 



1 day 5 days 

 6.0 39.0 

 1.3 20.6 

 6.5 58.0 

 4.7 19.8 



2 days 



11.4 



1.6 



9.3 



3 days 1 day 



47.1 7.6 



8.2 2.5 



29 . 3 5.1 



Total 

 period 



5 days 



45.9 



6.5 



16.1 



8.5 



3 days 



30.2 



6.9 



20.3 



8.7 



2 days 



13.3 



5.0 



14.7 



4.8 



5 days 

 16.0 



2.1 

 6.3 



8 days 

 50.8 

 24.5 

 74.7 

 33.0 



4 days 



21.7 



4.3 



18.5 



6 days 

 62.3 

 13.3 

 42.1 



* The checks in this series were undersized. 



