The roles of light and the nucleus in the regulation of reproductive onset in Acetabularia acetabulum

Planta ◽  
1999 ◽  
Vol 209 (4) ◽  
pp. 503-512 ◽  
Author(s):  
René F. Kratz ◽  
Dina F. Mandoli
Keyword(s):  
Acetabularia Acetabulum ◽  
Reproductive Onset

Coordination of cellular events that precede reproductive onset in Acetabularia acetabulum: evidence for a ‘loop’ in development

Development ◽  
1996 ◽  
Vol 122 (4) ◽  
pp. 1187-1194
Author(s):  
L.L. Runft ◽  
D.F. Mandoli
Keyword(s):  
Reproductive Structure ◽  
Acetabularia Acetabulum ◽  
Cellular Events ◽  
Cellular Volume ◽  
Adult Growth ◽  
Cell Age ◽  
Developmental Age ◽  
Reproductive Differentiation ◽  
Reproductive Onset ◽  
Adult Phase

Amputated apices from vegetative wildtype cells of the uninucleate green alga Acetabularia acetabulum can differentiate a reproductive structure of ‘cap’ in the absence of the nucleus (Hammerling, J. (1932) Biologisches Zentralblatt 52, 42–61). To define the limits of the ability of wildtype cells to control reproductive differentiation, we determined when during development apices from wildtype cells first acquired the ability to make a cap in the absence of the nucleus and, conversely, when cells with a nucleus lost the ability to recover from the loss of their apices. To see when the apex acquired the ability to make a cap without the nucleus, we removed apices from cells varying either the developmental age of the cells or the cellular volume left with the apex. Cells must have attained the adult phase of development before the enucleate apex could survive amputation and make a cap. Apices removed from cells early in adult growth required more cell volume to make a cap without the nucleus than did apices removed from cells late in adult growth. To define the limits of the cell to recapitulate development when reproduction falters, we analyzed development in cells whose caps either had been amputated or had spontaneously aborted. After loss of the first cap, cells repeated part of vegetative growth and then made a second cap. The ability to make a second cap after amputation of the first one was lost 15–20 days after cap initiation. Our data suggest that internal cues, cell age and size, are used to regulate reproductive onset in Acetabularia acetabulum and add to our understanding of how reproduction is coordinated in this giant cell.

scholarly journals A vacuolar H+-pyrophosphatase in Acetabularia acetabulum: molecular cloning and comparison with higher plants and a bacterium

1999 ◽  
Vol 50 (330) ◽  
pp. 139-140
Author(s):  
M. Ikeda ◽  
H. Rahman ◽  
C. Moritani ◽  
K. Umami ◽  
Y. Tanimura ◽  
...  
Keyword(s):  
Molecular Cloning ◽  
Higher Plants ◽  
Acetabularia Acetabulum

scholarly journals Alcohol Dependence and Reproductive Onset: Findings in Two Australian Twin Cohorts

2008 ◽  
Author(s):  
Mary Waldron ◽  
Andrew C. Heath ◽  
Kathleen K. Bucholz ◽  
Pamela A. F. Madden ◽  
Nicholas G. Martin
Keyword(s):  
Alcohol Dependence ◽  
Reproductive Onset

scholarly journals Diurnal Changes in Plasma Melatonin and the Timing of Reproductive Onset in Anestrous Sheep Fed Melatonin.

1991 ◽  
Vol 53 (3) ◽  
pp. 457-461 ◽  
Author(s):  
Naohito KUSAKARI ◽  
Yuko TAJIMA ◽  
Shunsuke ITOH ◽  
Kazuhiro SEN-NA ◽  
Shin SERIKAWA ◽  
...  
Keyword(s):  
Diurnal Changes ◽  
Plasma Melatonin ◽  
Reproductive Onset

MULTIMINERAL CALCAREOUS DEPOSITS IN THE MARINE ALGA ACETABULARIA ACETABULUM (CHLOROPHYTA; DASYCLADACEAE)

2003 ◽  
Vol 39 (5) ◽  
pp. 937-947 ◽  
Author(s):  
Roni J. Kingsley ◽  
Rachel Van Gilder ◽  
Racquel Z. LeGeros ◽  
Norimitsu Watabe
Keyword(s):  
Marine Alga ◽  
Acetabularia Acetabulum ◽  
Calcareous Deposits
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