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Abscisic Acid and Gibberellin‐in Three Ungrafted Apple ( Malus sylvestris ) Rootstock Clones
Author(s) -
YADAVA U. L.,
LOCKARD R. G.
Publication year - 1977
Publication title -
physiologia plantarum
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.351
H-Index - 146
eISSN - 1399-3054
pISSN - 0031-9317
DOI - 10.1111/j.1399-3054.1977.tb04062.x
Subject(s) - dwarfing , rootstock , gibberellin , abscisic acid , shoot , botany , gibberellic acid , malus , biology , horticulture , chemistry , germination , gene , biochemistry
ABA and gibberellin‐like substances were extracted from roots, shoots, and leaves of most dwarfing M9, semi‐dwarfing MM 106, and least dwarfing MM111 apple rootstock plants. Among tissues, the roots contained the largest and the shoots the smallest amounts of all the phytohormones studied. Plants of M9 contained the highest and MM111 the lowest ABA‐like substances in all tissues tested. Gibberellin 4+7 ‐like compounds were at the highest levels in the roots of MM111 and lowest in the roots of M9, whereas GA 3 ‐like substance was in the reverse order. All three gibberellin‐like compounds were highest in the shoots and leaves of MM111 and lowest in the respective tissues of M9 clone. Role of these phytohormones in the dwarfing mechanism is discussed.