Metabolism of 2,4-Dichlorophenoxyacetic Acid (2,4-D) in Soybean Root Callus
نویسندگان
چکیده
منابع مشابه
Metabolism of 2,4-dichlorophenoxyacetic Acid in 2,4-dichlorophenoxyacetic Acid-resistant soybean callus tissue.
Three 2,4-dichlorophenoxyacetic acid (2,4-D) -resistant root callus tissue lines of Glycine max L. Merrill var. Acme were derived by culturing callus tissue 2 to 6 months on 40 milligrams per liter 2,4-D and designated 40R, 40B, and 40C. Tissue line 40R had a lower level of 2,4-D uptake in 2-week-old tissue which disappeared in 3.5-week-old tissue and less free 2,4-D following incubation for 24...
متن کاملMetabolism of 2,4-Dichlorophenoxyacetic Acid (2,4-D) in Soybean Root Callus : EVIDENCE FOR THE CONVERSION OF 2,4-D AMINO ACID CONJUGATES TO FREE 2,4-D.
An auxin-requiring soybean root callus metabolized [1-(14)C]-2,4-dichlorophenoxyacetic acid (2,4-D) to diethyl ether-soluble amino acid conjugates and water-soluble metabolites. The uptake in tissue varied with incubation time, concentration, and amount of tissue. Uptake was essentially complete (80%) after a 24-hour incubation and the percentage of free 2,4-D in the tissue fell to its lowest p...
متن کاملEvidence for compartmentalization of conjugates of 2,4-dichlorophenoxyacetic Acid in soybean callus tissue.
Soybean Glycine max L. Merrill var. Amsoy 71 root callus tissue labeled with [1-(14)C]2,4-dichlorophenoxyacetic acid (2,4-D) which was subsequently incubated for 24 hours in the absence of 2,4-D, released considerable amounts of label into the media. These results led to an examination of the efflux of 2,4-D and 2,4-D metabolites during a 6-hour time period. Fifty% of the free 2,4-D was lost in...
متن کاملCallus and Differentiated Soybean Root Cultures
The metabolism of 11-14C12,4-dichlorophenoxyacetic acid (2,4-D) in soybean ( Glycine max IL.1 Merrill var. Amsoy) root callus and in differentiated soybean root cultures was investigated as a function of pesticide concentration and age of tissue. The chronological age of the tissue was found to be correlated with the mitotic index which reached a peak at 2 weeks and then declined. The metabolis...
متن کامل24 Gastrointestinal protein and amino acid metabolism in growing animals
The tissues of the gastrointestinal tract play a major role in the metabolism of protein and amino acids in growing animals. Intestinal tissue has a high rate of protein metabolism, which is directly linked to the high rates of proliferation, protein secretion, cell death and desquamation of various epithelial and lymphoid cells within the mucosa. Because the small intestine is the first tissue...
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ژورنال
عنوان ژورنال: Plant Physiology
سال: 1980
ISSN: 0032-0889,1532-2548
DOI: 10.1104/pp.66.4.537