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PROMOTION OF ROOT INITIATION BY GIBBERELLIC ACID IN LEAF DISCS OF TOMATO ( LYCOPERSICON ESCULENTUM ) CULTURED IN VITRO
Author(s) -
COLEMAN WARREN K.,
GREYSON RICHARD I.
Publication year - 1977
Publication title -
new phytologist
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 3.742
H-Index - 244
eISSN - 1469-8137
pISSN - 0028-646X
DOI - 10.1111/j.1469-8137.1977.tb01541.x
Subject(s) - gibberellic acid , lycopersicon , kinetin , darkness , biology , botany , solanaceae , gibberellin , in vitro , horticulture , tissue culture , germination , biochemistry , gene
SUMMARY Gibberellic acid (GA 3 ) stimulated the rooting of tomato leaf discs cultured on a defined nutrient medium in continuous darkness. In the presence of 2 × 10 −4 M tryptamine, GA 3 significantly enhanced root initiation over the concentration range of 1 × 10 −8 M to 1 × 10 −4 M. GA 3 could be replaced by GA 4/7 but not by kinetin. Indole‐3‐lactic acid was a highly active indole derivative in the induction of rooting in the tomato leaf discs. This effect was significantly enhanced by GA 3 . Possible reasons for this observation are discussed.