Table 1 . Growth effects of various phenoxy compounds. 



Substance 



Oat Coleoptile 



lA 



2-NMSeA 

 1-NMSP 

 2-NOA 

 1-NOA 



POA 



( + )POP 



(-)POP 



POiB 



( + )POB 



(-)POB 



( + )POV 



(-)POV 



rPOiV 



( + )POC 



(-)POC 



4-FPOA 



(-f)4-FPOP 



(-)4-FPOP 



2-ClPOA 



3-ClPOA 



4-ClPOA 



( + )4-ClPOP 



(-)4-ClPOP 



4-ClPOiB 



2-BrPOA 



3-BrPOA 



4-BrPOA 



( + )4-BrPOP 



(-)4-BrPOP 



2-1 POA 



(-)2-IPOP 



( + )2-IPOP 



3- 1 POA 



(+)3-IPOP 



(-)3-IPOP 



4- 1 POA 



( + )4-IPOP 



(-)4-IPOP 



2,4-l2POA 



2- Me POA 



3-McPOA 



4-McPOA 



( + )4-McPOP 



(-)4-McPOP 



4-EtPOA 



4-iPPOA 



4-tHPOA 



2-M(OPOA 



3-M(OI'OA 



4-M(OPOA 



2-NiPOA 



3-NiPOA 



4-\iPC)A 



pC; 



20% 



6.3t 

 4.7t 

 6. of 



5.5t 



I 



5.0 



4.7 



4.9 

 4.9 

 4.1 

 5.0 

 4.1 

 <4 



5.6 



5.3 



I 



6.0 

 6. Of 

 5.6t 



6.5 

 I 



6.5 

 5.1 



5. It 



5. Of 

 6. Of 



6.6 



6.2 



6.2 



5.6 



4.7 



6. Of 



5.8 



5.3t 



4.9 



4.9 



3.5 



5.0 



4.5 



(I) 



(I) 



3.7 



pCs 



40% 



6.8 



4.1 

 R 



S 

 5.5 



5.6 

 R 



5.4 

 5.4 



3.6 

 5.0 

 5.6 



5.9 



(R) 

 3.1 

 5.6 

 4.8 

 5.3 



S 

 5.4 



(R) 

 5.5 

 6.3 



R 



R 



S 



(R) 

 (R) 

 3.7 



S 



R 

 3.5 



(R) 



3.8 

 S 



(S) 

 4.3 



Wheat Root 



pCs 



20% 



7.7 



5.9 



S 



6.3 



5.4 



S 

 5.8 



S 



4.9 



5.1 

 5.1 



5.1 



S 

 6.0 



S 



6.5 

 6.7 



S 



S 



S 



7.0 



S 



S 

 7.6 

 6.4 

 6.8 



S 

 7.3 



6.0 



5.8 



S 



5.8 



4.9 



pC, 



50% 



7.7 

 4.8 



3.2 

 4.9 



3.3 

 5.1 



4.2 

 4.9 

 3.4 

 4.0 

 4.6 

 5.4 

 5.4 



4.5 

 4.8 

 5.0 

 5.2 



5.2 

 5.8 



4.0 



4.7 



5.3 

 5.0 



4.5 



Flax Root 



pC/ 

 50% 



8.2 



4.7t 

 - t 

 7.1 

 4.2 



3.4 

 5.9 

 4.0 



.5t 

 9 



6. 

 6. 

 4. 

 4. 

 4. 

 6. 



4.1 

 5.3 



3.6 



6.1 

 6.0 

 4. Of 

 5.0 

 6.0 



8 



5 



4 



3t 



5 



4 

 6.4 

 6.6 

 4.5t 

 4.2 

 6.0 

 5.0 

 6.5 



4 



It 

 1 



2 



- t 

 5.1 

 5.4 

 4.7 

 5.2 

 5.9 



- t 

 4.5 



3.7t 



- t 

 3.1 

 4.8 

 5.4 



Effect of 

 1-NMSP 



4.2 

 3.5 



+ + 



+ + + 

 



+ 

 + + + 



+ + + 

 + + 



+ + 

 + + + 



+ + + 



+ + 

 + + + 

 + + + 



+ + + 



+ + 



+ + + 



+ + + 



(+) 



+ + + 



+ 



+ + 



+ + + 



+ 



+ 

 + + + 



( + ) 

 + + + 



+ + 

 + + + 

 + + + 



+ 



+ + 

 + + + 



Effect on 

 2,4-D 



+ + + 

 + + + 



+ + + 



+ 



+ 



+ + 



+§ 

 



+ + 

 + + 

 + + 

 + + 





 



(+) 

 +++ 



+ + 

 + + 



+ 

 ++ + 



++ + 

 + 







+ 

 + 



+ + 



++ 



+++ 



+++ 



+ 





 



+ + 







+++ 



Type of Activity 



Auxin 



+ + + 

 

 



+ + 

 (+) 



+ 

 + + 





 



+ + 







+ 





 

 

 



+ + 

 + + 







+ 



+ + 

 +++ 



+ + + 







(+) 

 + 



+ + 

 + + 

 + + 







+ 



++ 

 (+) 

 + + 

 + + + 

 (+) 

 (+) 



+ 







(+) 

 + 

 + 



+ 







(+) 





 

 



+ 

 + 







+ + 







Anti- 

 au.xin 







+ + + 

 + + + 



+ 

 + + + 



+ + 







+ 



+ + + 







+ 



(+) 

 + + 



+ 



+ + 

 + + 





 



+ 



+ 



+ 



(+) 







+ 



+ + + 



(+) 



(+) 



+ 



+ 

 + + 







+ 



(+) 



(+) 



+ 

 ++ + 



+ 

 + + + 



+ 



(+) 



+ 



+ 



+ 



+ + 



+ + 



+++ 



+ + + 



+ 



+ 



+ 

 + + 



+ 

 ++ 



[ 220 J 



