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Comparative Effects and Concentration of Picloram, 2,4,5‐T and Dicamba in Tissue Culture
Author(s) -
DIAZCOLON J. D.,
BOVEY R. W.,
DAVIS F. S.,
BAUR J. R.
Publication year - 1972
Publication title -
physiologia plantarum
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.351
H-Index - 146
eISSN - 1399-3054
pISSN - 0031-9317
DOI - 10.1111/j.1399-3054.1972.tb01137.x
Subject(s) - dicamba , picloram , chemistry , biology , toxicology , botany , agronomy , weed control
In nutrient agar comparative concentrations (10 −3 to 10 −5 M ) of (2,4,5‐trichlorophenoxy)acetic acid (2,4,5‐T) were generally more inhibitory to the growth of tissue cultures of soybean ( Glycine max (L.) Merrill cv. Acme) and cottonwood ( Populus deltoides Marsh.) than were either 4‐amino‐3,5,6‐trichloropicolinic acid (picloram) or 3,6‐dichloro‐o‐anisic acid (dicamba). Compared to untreated tissue dicamba or picloram at 10 −6 M in the nutrient agar resulted in a 200 % increase in the growth of soybean tissue. At 10 −5 and 10 −6 M dicamba also produced an increase in the growth of cottonwood tissue. Greatest absorption of picloram and dicamba by tissue cultures from agar occurred during the first 24 h after treatment. However, absorption remained nearly static thereafter for 14 days. More dicamba was absorbed by soybean and cottonwood tissue cultures than either picloram or 2,4,5‐T.