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Changes in ATP in relation to floral induction and initiation in Pharbitis nil
Author(s) -
Thigpen Stephen P.,
Sachs Roy M.
Publication year - 1985
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.1399-3054.1985.tb02375.x
Subject(s) - pharbitis nil , adenosine , adenylate kinase , biology , botany , adenosine triphosphate , biochemistry , biophysics , enzyme
No changes in metabolism of adenosine phosphates as a function of short day induction were detected in cotyledons of Pharbitis nil Chois strain Violet. A gradual increase in ATP level was detected throughout the dark period in plumules. A rapid decline of ATP pool size was observed in induced plumules shortly after floral induction. The decline occurred close to the 14th hour of the dark period, 1 to 1.5 h after the dark period length required for a 90% flowering response, which is thought to be the minimum time required for transport of the floral stimulus (and assimilates) from the induced cotyledons to the plumule. Transport of the major adenylates from the cotyledons was verified using [ 14 C]‐adenine. Estimates of the amount, and rate, of adenylate transport suggest that the cotyledons could be an important source of adenylates to re‐establish the ATP pool size in evoked plumules.