Section 26
Chapter 25,790

The Fate of 2,4-Dichlorophenoxyacetic Acid in Bean Seedlings. I. Recovery of 2,4-Dichlorophenoxyacetic Acid and Its Breakdown in the Plant

Hay, J.R.; Thimann, K.V.

Plant Physiology 31(5): 382-387


ISSN/ISBN: 0032-0889
PMID: 16654905
DOI: 10.2307/4259075
Accession: 025789608

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A method for the extraction and bioassay of 2, 4-D from treated plants is described. It is shown that recovery from bean seedlings is quantitative but that freely extractable 2, 4-D rapidly disappears in the plant. This loss, presumably breakdown, is considerably faster in light than in darkness but even in the dark three-quarters of the absorbed 2, 4-D disappears in 5 days. The advantages of the method over those based on indirect criteria are discussed. -Harvard Univ., Cambridge 38, Mass.