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The periodic induction of dormancy during the rhythmic growth of Gnetum africanum
Author(s) -
Mialoundama F.,
Lauzac M.,
Paulet P.
Publication year - 1984
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.1399-3054.1984.tb06332.x
Subject(s) - epicotyl , dormancy , apical dominance , abscisic acid , biology , auxin , botany , endogeny , germination , biochemistry , shoot , gene
The rhythmic growth of Gnetum africanum Welw. has an endogenous origin. Correlations between the apical bud and young leaves located at the top of the epicotyl can explain this kind of growth. Young leaves inhibit the apical bud and a prolonged inhibition leads to bud dormancy. The period of inhibition coincides with the growth of these leaves. When growth stops, dormancy is induced. Moreover a removal of young leaves suppresses inhibition which prevents dormancy induction; here again a continous suppresses inhibition which prevents dormancy induction; here again a continuous growth results. A prolonged exogenous treatment of the apical bud with abscisic acid and auxin shows that these two growth substances can play a part in the induction of dormancy after removal of the young leaves.