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EFFECTS OF GIBBERELLIC ACID ON STEM APICES OF VERNALIZABLE GRASSES
Author(s) -
Roller D.,
Highkin H. R.,
Caso O. H.
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.tb10622.x
Subject(s) - primordium , gibberellic acid , biology , secale , meristem , botany , hordeum vulgare , shoot , poaceae , germination , gene , biochemistry
K oller , D. (Hebrew U., Jerusalem, Israel), H. R. H ighkin , and O. H. C aso . Effects of gibberellic acid on stem apices of vernalizable grasses. Amer. Jour. Bot. 47(6) : 518–524. Illus. 1960.—Gibberellic acid was found to have distinct morphogenic effects on the stem apices of 3 vernalizable but unvernalized grasses: Hordeum vulgare var. ‘Kentucky,’ Hordeum bulbosum and Secale cereale var. ‘Winter Petkus.’ In these 3 species, GA caused the activation of lateral meristems on the embryonic nodes of the stem apices, under both short‐ and long‐day conditions. These lateral meristems differentiated into either flower primordia or vegetative shoots. The flower primordia developed almost invariably in Hordeum, while in Secale they seldom did, the apical meristem usually resuming normal vegetative growth after treatment. Despite the occurrence of flowering, it is concluded that the role of GA in this phenomenon is restricted to the activation of lateral meristems in the apex.