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Inhibition of Lettuce Seed Germination and Root Elongation by Derivatives of Auxin and Reversal by Derivatives of Cycocel
Author(s) -
Khan A. A.,
Tolbert N. E.
Publication year - 1966
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.1399-3054.1966.tb09077.x
Subject(s) - elongation , germination , auxin , chemistry , indole test , horticulture , botany , biology , stereochemistry , biochemistry , materials science , ultimate tensile strength , gene , metallurgy
Lettuce seed germination or lettuce root elongation after germination in water was inhibited by 5.7 × 10 ‐6 M indoleacetic acid (IAA) and designated other IAA derivatives. These IAA‐inhibited growth responses were reversed by 10 ‐5 to 10 ‐6 M Cycocel, (2‐chloroethyl) trimethylammonium chloride, which alone was without effect. Only those Cycocel analogs, which have previously been shown to be active as plant growth retardants, were effective in reversing IAA inhibition of germination or root elongation. These results are consistent with the concept that Cycocel at low concentrations acts as an auxin antagonist. However. Cycocel did not reverse the inhibitory effects from indole‐3‐propionic acid or indole‐3‐butyric acid.