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Studies on plant growth‐regulating substances
Author(s) -
PRICE D. N.,
WAIN R. L.
Publication year - 1976
Publication title -
annals of applied biology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.677
H-Index - 80
eISSN - 1744-7348
pISSN - 0003-4746
DOI - 10.1111/j.1744-7348.1976.tb01700.x
Subject(s) - biology , lemna , benzoic acid , bioassay , ether , nitro , biological activity , metabolism , chemical structure , biochemistry , botany , stereochemistry , organic chemistry , chemistry , in vitro , alkyl , genetics
SUMMARY Nitrophenols structurally similar to 4‐hydroxy‐3‐nitrobenzoic acid and 4‐hydroxy‐3‐nitrobenzaldehyde have been examined for their ability to inhibit chloroplast development in linseed and oat seedlings, and their activity has been estimated quantitatively in specifically designed clover and Lemna bioassays. Twelve compounds were found to be active and activity is considered in relation to chemical structure. A nitro group in the 3‐position and a hydroxyl group or ether linkage in the 4‐position were found to be essential for activity whereas the nature of the functional group in the 1‐position could vary considerably. Possibilities in which activity might arise from metabolism of the applied compound were investigated using excised wheat and pea tissue, and compounds with various groupings in the 1‐position were shown to be converted to the corresponding active benzoic acid derivative.