Premium
Untersuchungen zur Wirknngsweise der Aminosäure‐konjugate der Auxine in waehsenden Geweben
Author(s) -
Kazemie Mirabotalib,
Klämbt Dieter
Publication year - 1969
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.1399-3054.1969.tb07402.x
Subject(s) - auxin , aspartic acid , coleoptile , conjugate , chemistry , hydrolysis , stimulation , amino acid , biochemistry , biology , mathematics , neuroscience , mathematical analysis , gene
Growth effect of auxin‐amino acid‐conjugates in some test tissues. — Three different amino acid conjugates of the auxin naphthalene‐1‐acetic acid (NAA)‐naphthaleue‐1‐acetyl‐L‐aspartic acid, naphlhalene‐1‐acetyl‐D‐aspartic acid, and naphthalene‐1‐acetyl‐L‐glutamic acid — have been prepared and tested for growth stimulation in tobacco callus tissues, sunflower hypocotyls, and wheat coleoptiles. All conjugates show less auxin activities than NAA. The ratios of concentrations for more or less the same growth stimulation are 1:25 to 1:100 and less. Each test tissue grows the least on the D‐aspartic acid conjugate. These results lend to the conclusion that growth stimulation by these conjugates has lo be an indirect one, probably due to their hydrolysis generating free auxins. It is unknown whether the hydrolysis takes place inside or outside the cells.