biologia plantarum

Biologia plantarum 5:68, 1963 | DOI: 10.1007/BF02933668

Use of 2,3,5-triiodobenzoic acid in studies on the growth correlation differences between epigeous and hypogeous seedlings (Linum andPisum)

Rudolf Dostál¹

¹ Department of Botany, College of Agriculture, Brno, ČSSR

Decapitated seedlings ofLinum andPisum treated with TIBA paste either above or below the cotyledons, showed different morphogenetic changes especially on the epicotyl stumps, due to the differences in the correlations of their epigeous and hypogeous cotyledons respectively, these being also primarily responsible for the differing dominance of their shoot primordia.
At the earliest phases of germination, an antagonism between TIBA and IAA can be demonstrated on the first internode inLinum, which is usually very short, as well as on the petioles of thePisum cotyledons. The former could be enlarged only by treatingLinum seeds, even when ripening on the plant, with TIBA paste and the latter, if retained by soaking seeds ofPisum in a TIBA solution could be promoted by exogenous IAA. This, on the contrary, reversed the morphogenetic effects of TIBA uponLinum seeds.

Received: January 20, 1962; Published: March 1, 1963  Show citation