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L'induction du rythme endogène de sporulation chez Aspergillus niger: Rõles du rapport glucose/potassium et de micro‐éléments
Author(s) -
JEREBZOFF S.,
JEREBZOFFQUINTIN S.,
LAMBERT E.
Publication year - 1976
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.1399-3054.1976.tb04428.x
Subject(s) - aspergillus niger , potassium , rhythm , spore , chemistry , endogeny , biology , botany , biochemistry , physics , organic chemistry , acoustics
In Aspergillus niger Van Tieghem cultivated on a synthetic medium, the induction of an endogenous rhythm of sporulation and its perpetuation depend on the glucose K + balance in the medium, an excess of one of them suppressing the oscillations. In its inducing effect on the rhythm K + is partially replaced by Rb + , but not by Na + , Li + or Cs + . While the glucose K + balance is favourable for the manifestation of the rhythm, the addition of increasing levels of Na + , Li + or Cs + do not modify the period length. Nevertheless, at 0.3 M of Na + or Li + and 0.03 M of Cs + rhythm disappears. The amplitude of oscillations depends on the level of the micro‐elements furnished, especially on Mn 2+ . EDTA (1 × 10 −3 M ) inhibits the rhythm.