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Influence of Two Phenoxy Growth Regulators on the Uptake and Accumulation of Naptalam by Bean Plants
Author(s) -
DEVLIN ROBERT M.,
YAKLICH ROBERT W.
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.tb03620.x
Subject(s) - phaseolus , plant growth , growth regulator , dry weight , biology , horticulture , regulator , 2,4 dichlorophenoxyacetic acid , botany , chemistry , biochemistry , gene
Bean plants ( Phaseolus vulgaris L. cv. Black Valentine) treated with 2,4‐dichlorophenoxyacetic acid (2,4‐D) and 4‐chlorophenoxyacetic acid (PCPA) absorb and accumulate considerably more N ‐1‐naphthylphthalamic acid (naptalam) than untreated plants. All concentrations of 2,4‐D from 5 x 10 ‐8 to 5 x 10 ‐4 M were effective, peak stimulation occurring at 3 x 10 ‐5 M . Plants treated with this concentration took up 186% more naptalam than control plants. It was shown that the leaf area (on a per g dry weight basis) was influenced most by growth regulator treatment. The leaf area of plants treated with 5 x 10 ‐5 M 2,4‐D contained 575% more naptalam than the leaf area of untreated plants. The influence of PCPA on naptalam uptake by bean plants was similar to that of 2,4‐D but less effective.