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GIBBERELLIN EFFECTS WITHIN HAZEL (CORYLUS AVELLANA L.) SEEDS DURING THE BREAKING OF DORMANCY I. A DIRECT EFFECT OF GIBBERELLIN ON THE EMBRYONIC AXIS
Author(s) -
ARVIS B. C. J.,
WILSON D.
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.tb04844.x
Subject(s) - gibberellin , gibberellic acid , cotyledon , dormancy , botany , biology , seed dormancy , chemistry , germination
SUMMARY Gibberellin Ai breaks the dormancy of hazel seed. Both GA 1 and GA 3 are transported more readily from embryonic axis to cotyledon than in the reverse direction. Since both gibberellins stimulate axis growth more rapidly when applied directly to it than when applied to the cotyledon, it seems likely that gibberellins directly affect the axis. This is confirmed by a rapid response of excised axes to gibberellic acid in liquid culture.