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THE EFFECT OF GIBBERELLIC ACID ON THE ABSORPTION AND TRANSLOCATION OF PHOSPHORUS‐32 BY BEAN PLANTS
Author(s) -
Linck A. J.,
Sudia Theodore W.
Publication year - 1960
Publication title -
american journal of botany
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.218
H-Index - 151
eISSN - 1537-2197
pISSN - 0002-9122
DOI - 10.1002/j.1537-2197.1960.tb07100.x
Subject(s) - gibberellic acid , phaseolus , biology , phosphorus , apex (geometry) , transpiration , hypocotyl , chromosomal translocation , horticulture , botany , agronomy , germination , photosynthesis , chemistry , biochemistry , organic chemistry , gene
L inck , A. J., and T heodore W. S udia . (U. Minnesota, St. Paul.) The effect of gibberellic acid on the absorption and translocation of phosphorus‐32 by bean plants. Amer. Jour. Bot. 47(2) : 101—105. Illus. 1960.–Plants of Phaseolus vulgaris, variety ‘Black Valentine,‘ treated with 1 p.p.m. gibberellic acid supplied to the roots for 4 hr. were compared with nontreated. plants for phosphorus‐32 uptake. Plants treated with gibberellic acid where transpiration was either rapid or restricted absorbed more phosphorus‐32 than those not treated. More phosphorus‐32 was recovered from plants free to transpire than from plants in high humidity. In plants free to transpire, significantly more phosphorus was present in the treated plants after 28 hr. and significantly more phosphorus‐32 accumulated in treated plants in those parts actively growing, i.e., stem apex, second internode and first trifoliate leaf, and in the roots. For plants in high humidity atmosphere significantly more phosphorus‐32 was absorbed by the treated plants at the end of 4 hr. than in the non‐treated plants and this difference was maintained throughout all times of harvest. For plants in high humidity atmosphere, significantly more phosphorus‐32 accumulated in the lower portions, i.e., roots, hypocotyl, first internode and primary leaves, of treated plants than of non‐treated plants, while the differences for the second internode, the first trifoliate leaf and the stem apex were not significant between treated and non‐treated plants.