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Effect of morphactin on certain plant growth substances in bean roots
Author(s) -
PARUPS E. V.
Publication year - 1980
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.1399-3054.1980.tb02664.x
Subject(s) - vermiculite , gibberellin , chemistry , phaseolus , abscisic acid , horticulture , botany , nuclear chemistry , biology , biochemistry , gene
The effect of morphactin (methyl‐2‐chloro‐9‐hydroxyfluorene‐9‐carboxylate) on the content of several plant growth substances in bean roots was determined. Beans ( Phaseolus vulgaris L. cv. Spartan) were soaked in aqueous solutions of morphactin, 1 x 10 ‐4 , 1 x 10 ‐5 , and 1 x 10 ‐6 M and grown in moist vermiculite. As controls were used beans grown in water‐moistened vermiculite either intact or having the root tips removed (decapped). The roots, morphactin‐treated, controls, and the decapped ones were analyzed for indol‐3‐yl acetic acid (IAA), indol‐3‐yl acrylic acid (IAcA), indol‐3‐yl pyruvic acid (IPyA), indol‐3‐yl lactic acid (1LA), abscisic acid (ABA), gibberellins GA 1 , GA 3 , GA 4 , and GA 9 using gas‐liquid chromatographic methods. Morphactin, while affecting the geotropical responses, changed also the growth substance content of roots. IAA, ABA, GA 1 , and GA 9 contents decreased, IPyA, IAeA, GA 3 , and GA 4 contents were not affected and ILA content increased slightly with increasing dosages of morphactin. Growth substance pattern of decapped roots resembled that of the roots treated with the highest dose, 1 x 10 ‐4 M , of morphactin.