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Effects of 2,3,5‐Triiodobenzoic Acid on the Morphology and Anatomy of Glycine max (L.) Merrill 1
Author(s) -
Ghorashy S. R.,
Colville W. L.,
Ashworth D. L.
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/cropsci1969.0011183x000900040001x
Subject(s) - petiole (insect anatomy) , vascular bundle , biology , cambium , glycine , morphology (biology) , vascular cambium , botany , spongy tissue , vascular tissue , anatomy , horticulture , xylem , amino acid , palisade cell , biochemistry , hymenoptera , genetics
A foliar application of 75 g/ha of 2,3,5‐triiodobenzoic acid (TIBA) on soybeans at the six‐trifoliolate‐leaf stage modified the morphology and anatomy of the stem, leaf, and petiole. Plants treated with TIBA had a greater number of branches and were shorter than untreated plants. Leaves differentiated after TIBA treatment were smaller, darker green and showed interveinal puckering. Leaves located at nodes 17 and/or 18 exhibited considerable proliferation of vascular bundles. Histological examination of these leaves indicated continuous procambium activity, disorganization of mesophyll tissues and reduced cell size in the laminae. Tetrafoliolate leaves were frequently developed at nodes 17 and 18 on plants receiving TIBA treatments. Petioles developed after TIBA treatment were longer, twisted and in some cases showed tissue abnormalities. Application of TIBA did not increase stem diameter, but altered the pattern of cambium activity throughout the length of the stem.