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Influence of Naphthaleneacetic Acid and Phosphate Stress on Uterotropic Activity in Trifolium medium L. 1
Author(s) -
Gourley L. M.,
Keim W. F.,
Stob Martin
Publication year - 1969
Publication title -
crop science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.76
H-Index - 147
eISSN - 1435-0653
pISSN - 0011-183X
DOI - 10.2135/cropsci1969.0011183x000900010010x
Subject(s) - dry matter , forage , biology , phosphate , nutrient , zoology , plant growth , botany , agronomy , horticulture , biochemistry , ecology
A single application of naphthaleneacetic acid (NAA) in concentrations of 0.46 or 0.91 × 10 −3 M produced a 20 to 25% increase in the uterotropic activity of forage produced by two genotypes of zigzag clover, Trifolium medium L. An application of 1.37 × 10 −3 M did not raise uterotropic activity over that of the control. The auxin‐treated forage was more lush and had a lower percent dry matter than the untreated plants. Phosphate stresses, created by varying the amounts of phosphate in the nutrient solutions supplied to two genotypes of zigzag clover in sand culture, failed to increase uterotropic activity. A significant increase in yield of dry matter was observed along with a significant decrease in percent dry matter as the level of P was raised from 0 to 16 to 32 ppm.